OpenPay
payment-ready until 2026-10-17
Live on-chain data about JPYC (the Japanese yen stablecoin) and curated Japan Web3 directories for AI agents, paid per request in USDC on Base via standard x402 (exact scheme, facilitator: Coinbase CDP).
Call it x402 v2
x402 v2
- Base URL
- https://open-pay.jp
- Payment
- x402 v2, header channel
$ curl -i 'https://open-pay.jp/api/paid/usdc/japan-web3-directory' An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.
Endpoints 9 paid routes on open-pay.jp
GET/api/paid/usdc/japan-web3-directory Base$0.02since 09-14
GET/api/paid/usdc/japan-web3-directory/search Base$0.02since 09-14
GET/api/paid/usdc/jpyc/activity Base$0.01since 09-14
GET/api/paid/usdc/jpyc/balance Base$0.002since 09-14
GET/api/paid/usdc/jpyc/services Base$0.01since 09-14
GET/api/paid/usdc/jpyc/supply Base$0.002since 09-14
GET/api/paid/usdc/jpyc/transfers Base$0.005since 09-14
GET/api/paid/usdc/stablecoin-payments Base$0.01since 09-14
1 more in Example 402 response
Prices as captured in the 402 response: median $0.01 across the 9 endpoints, unchanged since first capture.
Example 402 response
Endpoints and prices
| Method | Path | Description | Price | Network | Asset | 402 channel | Captured |
|---|---|---|---|---|---|---|---|
| GET | / | No description | $0.02 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
| GET | / | No description | $0.02 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
| GET | / | No description | $0.01 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
| GET | / | No description | $0.002 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
| GET | / | No description | $0.01 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
| GET | / | No description | $0.002 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
| GET | / | No description | $0.005 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
| GET | / | No description | $0.01 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
| GET | / | No description | $0.04 | Base | USDC, GatewayWalletBatched | header | since 09-14 |
Payment evidence
402 payload captured at . Check evidence JSON · Measurement methodology.
First of 9 payloads captured by the monitor.
251 lines, scroll inside
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "20000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/japan-web3-directory/search",
"tags": [
"japan",
"web3",
"directory",
"search",
"filter",
"jpyc",
"usdc",
"sourced-data"
],
"mimeType": "application/json",
"description": "Filter the Japan Web3 Directory by category, token, chain or capability — the same sourced, date-stamped records as the full export, without pulling rows your agent doesn't need.",
"serviceName": "Japan Web3 Directory Search"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "polygon",
"limit": "20",
"token": "jpyc",
"category": "exchange"
}
},
"output": {
"type": "json",
"example": {
"items": [
{
"name": "JPYC EX",
"slug": "jpyc-ex",
"facts": {
"tags": [
"Japan",
"issuance",
"redemption"
],
"chains": [
"avalanche",
"ethereum",
"polygon"
],
"tokens": [
"jpyc"
],
"category": "exchange",
"supportsMcp": false,
"supportsJpyc": true,
"supportsUsdc": false,
"supportsX402": false
},
"nameJa": "JPYC EX",
"status": "published",
"sourceOk": true,
"editorial": {
"summaryEn": "The official starting point for JPYC issuance and redemption."
},
"sourceUrl": "https://jpyc.co.jp/",
"sourceType": "official",
"verifiedAt": "2026-07-13",
"sourceCheckedAt": "2026-08-20T01:27:11.803Z"
}
],
"query": {
"limit": 20,
"offset": 0
},
"total": 19,
"generatedAt": "2026-08-21T00:32:38.608Z",
"schemaVersion": "1.0"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"chain": {
"enum": [
"arbitrum",
"avalanche",
"base",
"ethereum",
"kaia",
"optimism",
"polygon"
],
"type": "string"
},
"limit": {
"type": "string",
"description": "1-50 (default 20)"
},
"token": {
"enum": [
"jpyc",
"usdc"
],
"type": "string"
},
"offset": {
"type": "string",
"description": "0-1000 (default 0)"
},
"status": {
"enum": [
"draft",
"review",
"published",
"rejected",
"archived"
],
"type": "string",
"description": "Only published entries can be returned, regardless of this filter."
},
"keyword": {
"type": "string",
"maxLength": 100,
"description": "Free-text match on name/summary"
},
"category": {
"enum": [
"api",
"bridge",
"developer-tool",
"exchange",
"network",
"payment",
"stablecoin",
"wallet"
],
"type": "string"
},
"language": {
"enum": [
"en",
"ja"
],
"type": "string"
},
"supportsMcp": {
"enum": [
"true",
"false"
],
"type": "string"
},
"supportsJpyc": {
"enum": [
"true",
"false"
],
"type": "string"
},
"supportsUsdc": {
"enum": [
"true",
"false"
],
"type": "string"
},
"supportsX402": {
"enum": [
"true",
"false"
],
"type": "string"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
} Other captured 402 responses (8)
Captured payload 2 of 9
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "20000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/japan-web3-directory",
"tags": [
"japan",
"web3",
"directory",
"jpyc",
"usdc",
"sourced-data",
"ai-agent"
],
"mimeType": "application/json",
"description": "Japan Web3 Directory, full export: sourced records on Japan's JPYC/USDC, exchange, wallet and AI-agent services — every row carries an official source URL and last-verified date.",
"serviceName": "Japan Web3 Directory"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "json",
"example": {
"items": [
{
"name": "JPYC EX",
"slug": "jpyc-ex",
"facts": {
"tags": [
"Japan",
"issuance",
"redemption"
],
"chains": [
"avalanche",
"ethereum",
"polygon"
],
"tokens": [
"jpyc"
],
"category": "exchange",
"supportsMcp": false,
"supportsJpyc": true,
"supportsUsdc": false,
"supportsX402": false
},
"nameJa": "JPYC EX",
"status": "published",
"sourceOk": true,
"editorial": {
"summaryEn": "The official starting point for JPYC issuance and redemption."
},
"sourceUrl": "https://jpyc.co.jp/",
"sourceType": "official",
"verifiedAt": "2026-07-13",
"sourceCheckedAt": "2026-08-20T01:27:11.803Z"
}
],
"query": {
"limit": 20,
"offset": 0
},
"total": 19,
"generatedAt": "2026-08-21T00:32:38.608Z",
"schemaVersion": "1.0"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 3 of 9
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "10000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/stablecoin-payments",
"tags": [
"japan",
"stablecoin",
"payments",
"monitoring",
"change-feed",
"weekly"
],
"iconUrl": "https://open-pay.jp/icon-512.png",
"mimeType": "application/json",
"description": "Japan Stablecoin Payment Monitor: weekly change feed for stablecoin payment services in Japan — new launches, pilots, partnerships, fee changes, supported assets and chains, and closures. Each event is dated, categorized and tied to an official source URL. Pass changedSince=YYYY-MM-DD (your last run date) to fetch only new events; an empty changes list explicitly means no change. Without changedSince you get the full dated history back to late 2025.",
"serviceName": "Japan Stablecoin Payment Monitor"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"changedSince": "2026-08-01"
}
},
"output": {
"type": "json",
"example": {
"mode": "delta",
"query": {
"limit": 200,
"changedSince": "2026-08-01"
},
"notice": {
"code": "sourced-facts-only",
"detail": "Events summarize official announcements about stablecoin payment services in Japan; verify with each sourceUrl before relying on a change.",
"termsUrl": "https://open-pay.jp/en/terms"
},
"changes": [
{
"date": "2026-08-10",
"diffs": [
{
"field": "status",
"currentValue": "commercial",
"previousValue": null
}
],
"assets": [
"USDC"
],
"chains": [
"base"
],
"summary": "Digital Garage started commercial rollout of DG Stablecoin Payment Service (API-based merchant integration; initially USDC on Base, first offered to JCB and DGFT).",
"provider": "DG Stablecoin Payment Service",
"sourceUrl": "https://www.garage.co.jp/pr/release/20260810/",
"summaryJa": "デジタルガレージが DG Stablecoin Payment Service の商用展開を開始 (API 接続の加盟店向け・当初は Base 上の USDC・JCB/DGFT へ先行提供)。",
"changeType": "added",
"changeCategory": "service_launch"
}
],
"hasMore": false,
"providers": [
{
"slug": "dg-sps",
"stage": "commercial",
"assets": [
"USDC"
],
"chains": [
"base"
],
"region": "Japan",
"provider": "DG Stablecoin Payment Service",
"sourceUrl": "https://www.garage.co.jp/pr/release/20260810/",
"startedAt": "2026-08-10",
"verifiedAt": "2026-08-27",
"announcedAt": "2026-08-10",
"merchantFee": null,
"integrations": [
"api"
],
"lastEventDate": "2026-08-10",
"plannedPeriod": null,
"posIntegration": null,
"settlementCurrency": null
}
],
"generatedAt": "2026-08-27T02:00:00.000Z",
"totalEvents": 7,
"licenseNotice": "Events summarize what official sources state; they are not availability guarantees or endorsements. Source rights remain with their owners.",
"schemaVersion": "1.0",
"totalProviders": 7,
"nextChangedSince": "2026-08-27"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "string",
"description": "1-200 (default 200). In delta mode the limit is rounded up to a date boundary: a single day is never split, so a day holding more events is returned whole. Continue with nextChangedSince while hasMore is true."
},
"changedSince": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"description": "Return only events on/after this date (YYYY-MM-DD). Set to your last run date. Omit for the full history."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 4 of 9
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "40000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "40000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/stores",
"tags": [
"jpyc",
"japan",
"stablecoin",
"acceptance",
"exchanges",
"dapps",
"directory"
],
"mimeType": "application/json",
"description": "Where JPYC (Japan's yen-pegged stablecoin) is accepted: curated exchanges, DEXes, dApps and bridges as JSON, each with category, supported assets and an official URL.",
"serviceName": "JPYC Acceptance Directory"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "json",
"example": {
"items": [
{
"url": "https://jpyc.co.jp/",
"name": "JPYC EX",
"assets": [
"jpyc"
],
"badges": [
"jp-only"
],
"category": "exchange"
},
{
"url": "https://app.uniswap.org/",
"name": "Uniswap",
"assets": [
"usdc"
],
"badges": [
"global"
],
"category": "dex"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 5 of 9
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "2000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/jpyc/balance",
"tags": [
"jpyc",
"wallet-balance",
"payment-reconciliation",
"treasury",
"onchain-data",
"multi-chain"
],
"iconUrl": "https://open-pay.jp/icon-512.png",
"mimeType": "application/json",
"description": "Read the current on-chain JPYC balance of any EVM address on one or all supported chains (Polygon, Kaia, Avalanche, Ethereum), with the token contract and the block number observed at request time. Use before or after a payment, for treasury checks, wallet monitoring, and payment reconciliation. The result does not prove wallet ownership and is not a transaction-finality certificate.",
"serviceName": "JPYC Wallet Balance"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "polygon",
"address": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81"
}
},
"output": {
"type": "json",
"example": {
"items": [
{
"chain": "polygon",
"status": "ok",
"balance": "1000000000000000000000",
"chainId": 137,
"contract": "0xE7C3D8C9a439feDe00D2600032D5dB0Be71C3c29",
"blockNumber": "92387745",
"balanceFormatted": "1000"
}
],
"token": {
"symbol": "JPYC",
"decimals": 18
},
"notice": "onchain-facts-only",
"address": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"termsUrl": "https://open-pay.jp/en/terms",
"generatedAt": "2026-08-21T04:30:45.340Z",
"schemaVersion": "2.2"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"address"
],
"properties": {
"chain": {
"enum": [
"polygon",
"kaia",
"avalanche",
"ethereum"
],
"type": "string",
"description": "Chain to query. Omit to query all supported chains. Supported values: polygon, kaia, avalanche, ethereum."
},
"address": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "EVM address to read the JPYC balance of."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"schemaVersion",
"token",
"generatedAt",
"notice",
"termsUrl",
"address",
"items"
],
"properties": {
"items": {
"type": "array",
"items": {
"oneOf": [
{
"type": "object",
"required": [
"chain",
"chainId",
"contract",
"status",
"blockNumber",
"balance",
"balanceFormatted"
],
"properties": {
"chain": {
"enum": [
"polygon",
"kaia",
"avalanche",
"ethereum"
],
"type": "string"
},
"status": {
"type": "string",
"const": "ok"
},
"balance": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "Atomic JPYC amount with 18 decimals."
},
"chainId": {
"type": "integer",
"minimum": 1
},
"contract": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"blockNumber": {
"type": "string",
"pattern": "^[0-9]+$"
},
"balanceFormatted": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)?$"
}
},
"additionalProperties": false
},
{
"type": "object",
"required": [
"chain",
"chainId",
"contract",
"status",
"errorCode",
"retryable"
],
"properties": {
"chain": {
"enum": [
"polygon",
"kaia",
"avalanche",
"ethereum"
],
"type": "string"
},
"status": {
"type": "string",
"const": "unavailable"
},
"chainId": {
"type": "integer",
"minimum": 1
},
"contract": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"errorCode": {
"enum": [
"rpc_unavailable",
"contract_read_failed"
],
"type": "string"
},
"retryable": {
"type": "boolean"
}
},
"additionalProperties": false
}
]
}
},
"token": {
"type": "object",
"required": [
"symbol",
"decimals"
],
"properties": {
"symbol": {
"type": "string",
"const": "JPYC"
},
"decimals": {
"type": "integer",
"const": 18
}
},
"additionalProperties": false
},
"notice": {
"type": "string",
"const": "onchain-facts-only",
"description": "On-chain facts read from public RPC endpoints at request time. Informational only — not financial advice, not an offer, quote or solicitation. Full terms at termsUrl."
},
"address": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"termsUrl": {
"type": "string",
"format": "uri"
},
"generatedAt": {
"type": "string",
"format": "date-time"
},
"schemaVersion": {
"type": "string",
"const": "2.2"
}
},
"additionalProperties": false
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 6 of 9
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "5000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/jpyc/transfers",
"tags": [
"jpyc",
"token-transfers",
"wallet-activity",
"payment-reconciliation",
"transaction-monitoring",
"onchain-data"
],
"iconUrl": "https://open-pay.jp/icon-512.png",
"mimeType": "application/json",
"description": "List recent JPYC Transfer events on one supported chain from roughly the last hour of blocks, optionally filtered by address — tx hash, from, to, amount, block. Without a cursor: newest first. With a cursor: only events after that position, oldest first, so each observed event is returned once within the scanned window. Use to confirm a recent JPYC payment or monitor wallet activity. Not for history beyond the window, sanctions screening, identity, or finality proof.",
"serviceName": "Recent JPYC Transfers"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "polygon",
"limit": "20"
}
},
"output": {
"type": "json",
"example": {
"mode": "snapshot",
"chain": "polygon",
"items": [
{
"to": "0xB808AF91bDc577BFb3f9c91470f3286dd076e5C1",
"from": "0x13FE0A65D0aA7641B44D1AF17ECE4b41cEbB1880",
"value": "600000000000000000000000",
"txHash": "0xcae3af66168483e5905709cfc8f7cc0162f5234b9c456905df8ab4917b6f8c39",
"logIndex": 286,
"blockNumber": "92387695",
"valueFormatted": "600000"
}
],
"token": {
"symbol": "JPYC",
"decimals": 18
},
"notice": "onchain-facts-only",
"chainId": 137,
"hasMore": false,
"toBlock": "92387745",
"contract": "0xE7C3D8C9a439feDe00D2600032D5dB0Be71C3c29",
"termsUrl": "https://open-pay.jp/en/terms",
"fromBlock": "92385945",
"truncated": false,
"nextCursor": "92387695:286",
"generatedAt": "2026-08-21T04:30:45.340Z",
"schemaVersion": "2.2"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"chain"
],
"properties": {
"chain": {
"enum": [
"polygon",
"kaia",
"avalanche",
"ethereum"
],
"type": "string",
"description": "Chain to scan. Supported values: polygon, kaia, avalanche, ethereum."
},
"limit": {
"type": "string",
"default": "20",
"pattern": "^(?:[1-9]|[1-9][0-9]|100)$",
"description": "Maximum number of transfer events to return, newest first (1-100). This is not a page number."
},
"cursor": {
"type": "string",
"pattern": "^[0-9]+:(?:-1|[0-9]+)$",
"description": "The nextCursor value from a previous response (\"<block>:<logIndex>\"). Returns only transfers newer than that position, oldest first (mode=delta), so repeated calls pay only for new events and return each observed event once within the scanned window, assuming stable chain history; continue with nextCursor while hasMore is true. A cursor up to 64 blocks beyond the current chain head (normal when a node lags) returns no items and echoes the cursor back; further ahead is rejected with 400 cursor_ahead_of_head."
},
"address": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Only transfers where this address is the sender or the recipient."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"schemaVersion",
"token",
"generatedAt",
"notice",
"termsUrl",
"chain",
"chainId",
"contract",
"fromBlock",
"toBlock",
"mode",
"nextCursor",
"hasMore",
"truncated",
"items"
],
"properties": {
"mode": {
"enum": [
"snapshot",
"delta"
],
"type": "string",
"description": "snapshot = no cursor was supplied; items are newest first. delta = a cursor was supplied; items are the events after that position, oldest first."
},
"chain": {
"enum": [
"polygon",
"kaia",
"avalanche",
"ethereum"
],
"type": "string"
},
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"blockNumber",
"txHash",
"logIndex",
"from",
"to",
"value",
"valueFormatted"
],
"properties": {
"to": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"from": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"value": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "Atomic JPYC amount with 18 decimals."
},
"txHash": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{64}$"
},
"logIndex": {
"type": "integer",
"minimum": 0
},
"blockNumber": {
"type": "string",
"pattern": "^[0-9]+$"
},
"valueFormatted": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)?$"
}
},
"additionalProperties": false
}
},
"token": {
"type": "object",
"required": [
"symbol",
"decimals"
],
"properties": {
"symbol": {
"type": "string",
"const": "JPYC"
},
"decimals": {
"type": "integer",
"const": 18
}
},
"additionalProperties": false
},
"notice": {
"type": "string",
"const": "onchain-facts-only",
"description": "On-chain facts read from public RPC endpoints at request time. Informational only — not financial advice, not an offer, quote or solicitation. Full terms at termsUrl."
},
"chainId": {
"type": "integer",
"minimum": 1
},
"hasMore": {
"type": "boolean",
"description": "delta: more events exist after the returned ones — call again with nextCursor to continue. snapshot: older events in the window were omitted and are NOT retrievable via nextCursor (it starts after the newest returned event)."
},
"toBlock": {
"type": "string",
"pattern": "^[0-9]+$"
},
"contract": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"termsUrl": {
"type": "string",
"format": "uri"
},
"fromBlock": {
"type": "string",
"pattern": "^[0-9]+$"
},
"truncated": {
"type": "boolean",
"description": "true when the supplied cursor is older than the scanned block window; events between the cursor and fromBlock were not scanned."
},
"nextCursor": {
"type": "string",
"pattern": "^[0-9]+:(?:-1|[0-9]+)$",
"description": "Pass as the cursor query parameter on the next call to receive only transfers newer than this response (\"<block>:<logIndex>\"). In snapshot mode this is where monitoring starts (after the newest returned event). Never moves backwards relative to the cursor you supplied."
},
"generatedAt": {
"type": "string",
"format": "date-time"
},
"schemaVersion": {
"type": "string",
"const": "2.2"
}
},
"additionalProperties": false
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 7 of 9
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "10000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/jpyc/services",
"tags": [
"jpyc",
"japan",
"web3",
"monitoring",
"change-feed",
"weekly"
],
"iconUrl": "https://open-pay.jp/icon-512.png",
"mimeType": "application/json",
"description": "JPYC Service Monitor: weekly change feed for Japan-related JPYC and Web3 services. Each event is dated, typed (added / updated / removed / verified) and tied to an official source URL. Call with changedSince=YYYY-MM-DD set to your last run date to fetch only what changed; an empty changes list explicitly means no change, so a scheduled agent can report that without guessing. Without changedSince you get the full monitor snapshot.",
"serviceName": "JPYC Service Monitor"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"changedSince": "2026-08-20"
}
},
"output": {
"type": "json",
"example": {
"mode": "delta",
"query": {
"limit": 200,
"changedSince": "2026-05-15"
},
"notice": {
"code": "sourced-facts-only",
"detail": "Change events and rows summarize what official sources state; they are not availability guarantees or endorsements.",
"termsUrl": "https://open-pay.jp/en/terms"
},
"changes": [
{
"date": "2026-05-15",
"slug": "jpyc-ex",
"diffs": [
{
"field": "chains",
"currentValue": [
"avalanche",
"ethereum",
"polygon",
"kaia"
],
"previousValue": [
"avalanche",
"ethereum",
"polygon"
]
},
{
"field": "limit",
"currentValue": "1,000,000 JPY per transaction (issuance)",
"previousValue": "1,000,000 JPY per day (issuance)"
}
],
"summary": "JPYC EX added Kaia support and changed the issuance cap from 1M JPY per day to 1M JPY per transaction.",
"sourceUrl": "https://prtimes.jp/main/html/rd/p/000000315.000054018.html",
"summaryJa": "JPYC EX が Kaia に対応。発行上限を「1日100万円」から「1回100万円」へ変更。",
"changeType": "updated",
"collectedAt": "2026-08-27"
}
],
"hasMore": false,
"services": [
{
"name": "JPYC EX",
"slug": "jpyc-ex",
"chains": [
"avalanche",
"ethereum",
"kaia",
"polygon"
],
"nameJa": "JPYC EX",
"status": "published",
"category": "exchange",
"sourceOk": true,
"sourceUrl": "https://jpyc.co.jp/",
"verifiedAt": "2026-08-27",
"supportsJpyc": true,
"supportsUsdc": false,
"supportsX402": false,
"sourceCheckedAt": "2026-08-27T01:00:00.000Z"
}
],
"attribution": [
"JPYC株式会社"
],
"generatedAt": "2026-08-27T01:23:45.000Z",
"licenseNotice": "Facts summarized from official sources; source rights remain with their owners.",
"schemaVersion": "1.0",
"totalServices": 20,
"nextChangedSince": "2026-08-27"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "string",
"description": "1-200 (default 200). In delta mode the limit is rounded up to a date boundary: a single day is never split, so a day holding more events is returned whole. Continue with nextChangedSince while hasMore is true."
},
"changedSince": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"description": "Return only changes on/after this date (YYYY-MM-DD). Set to your last run date. Omit for the full snapshot."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 8 of 9
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "2000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/jpyc/supply",
"tags": [
"jpyc",
"japanese-yen",
"stablecoin",
"token-supply",
"onchain-data",
"multi-chain"
],
"iconUrl": "https://open-pay.jp/icon-512.png",
"mimeType": "application/json",
"description": "Read the current contract-reported JPYC totalSupply on Polygon, Kaia, Avalanche or Ethereum, with the token contract address and the block number observed at request time. Use for periodic supply monitoring, cross-chain comparison, or verifying a current JPYC supply figure before citing it. Not for market price, reserve backing, circulating-supply analysis, or financial advice.",
"serviceName": "JPYC Supply by Chain"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "polygon"
}
},
"output": {
"type": "json",
"example": {
"items": [
{
"chain": "polygon",
"status": "ok",
"chainId": 137,
"contract": "0xE7C3D8C9a439feDe00D2600032D5dB0Be71C3c29",
"blockNumber": "92387745",
"totalSupply": "1234567890000000000000000",
"totalSupplyFormatted": "1234567.89"
}
],
"token": {
"symbol": "JPYC",
"decimals": 18
},
"notice": "onchain-facts-only",
"termsUrl": "https://open-pay.jp/en/terms",
"generatedAt": "2026-08-21T04:30:45.340Z",
"schemaVersion": "2.2"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"chain": {
"enum": [
"polygon",
"kaia",
"avalanche",
"ethereum"
],
"type": "string",
"description": "Chain to query. Omit to query all supported chains. Supported values: polygon, kaia, avalanche, ethereum."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"schemaVersion",
"token",
"generatedAt",
"notice",
"termsUrl",
"items"
],
"properties": {
"items": {
"type": "array",
"items": {
"oneOf": [
{
"type": "object",
"required": [
"chain",
"chainId",
"contract",
"status",
"blockNumber",
"totalSupply",
"totalSupplyFormatted"
],
"properties": {
"chain": {
"enum": [
"polygon",
"kaia",
"avalanche",
"ethereum"
],
"type": "string"
},
"status": {
"type": "string",
"const": "ok"
},
"chainId": {
"type": "integer",
"minimum": 1
},
"contract": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"blockNumber": {
"type": "string",
"pattern": "^[0-9]+$"
},
"totalSupply": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "Atomic JPYC amount with 18 decimals."
},
"totalSupplyFormatted": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)?$"
}
},
"additionalProperties": false
},
{
"type": "object",
"required": [
"chain",
"chainId",
"contract",
"status",
"errorCode",
"retryable"
],
"properties": {
"chain": {
"enum": [
"polygon",
"kaia",
"avalanche",
"ethereum"
],
"type": "string"
},
"status": {
"type": "string",
"const": "unavailable"
},
"chainId": {
"type": "integer",
"minimum": 1
},
"contract": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"errorCode": {
"enum": [
"rpc_unavailable",
"contract_read_failed"
],
"type": "string"
},
"retryable": {
"type": "boolean"
}
},
"additionalProperties": false
}
]
}
},
"token": {
"type": "object",
"required": [
"symbol",
"decimals"
],
"properties": {
"symbol": {
"type": "string",
"const": "JPYC"
},
"decimals": {
"type": "integer",
"const": 18
}
},
"additionalProperties": false
},
"notice": {
"type": "string",
"const": "onchain-facts-only",
"description": "On-chain facts read from public RPC endpoints at request time. Informational only — not financial advice, not an offer, quote or solicitation. Full terms at termsUrl."
},
"termsUrl": {
"type": "string",
"format": "uri"
},
"generatedAt": {
"type": "string",
"format": "date-time"
},
"schemaVersion": {
"type": "string",
"const": "2.2"
}
},
"additionalProperties": false
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 9 of 9
{
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE"
},
"payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
"amount": "10000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://open-pay.jp/api/paid/usdc/jpyc/activity",
"tags": [
"jpyc",
"network-activity",
"token-transfers",
"polygon",
"onchain-data"
],
"iconUrl": "https://open-pay.jp/icon-512.png",
"mimeType": "application/json",
"description": "JPYC transfer metrics computed hourly from finalized Polygon blocks: event count, unique senders and receivers, volume, median and top receivers. Covers approximately 24 hours ending at the newest finalized hourly bucket; exact block and time range are in the response. Use for current JPYC usage metrics; not for wallet balances, price, news, supply or financial advice.",
"serviceName": "JPYC Network Activity"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "polygon",
"window": "24h"
}
},
"output": {
"type": "json",
"example": {
"chain": "polygon",
"token": {
"symbol": "JPYC",
"decimals": 18
},
"notice": "onchain-facts-only",
"volume": "1000000000000000000",
"window": "24h",
"chainId": 137,
"toBlock": "92386799",
"contract": "0xE7C3D8C9a439feDe00D2600032D5dB0Be71C3c29",
"termsUrl": "https://open-pay.jp/en/terms",
"expiresAt": "2026-09-08T06:59:58.000Z",
"fromBlock": "92343600",
"observedAt": "2026-09-08T02:59:58.000Z",
"definitions": {
"median": "floored atomic average for even counts",
"eligible": "positive-value transfers with distinct sender and receiver, excluding the zero address",
"countUnit": "events"
},
"generatedAt": "2026-09-08T03:20:00.000Z",
"toTimestamp": "2026-09-08T02:59:58.000Z",
"topReceivers": [
{
"count": 1,
"volume": "1000000000000000000",
"address": "0x52d4901142e2b5680027da5eb47c86cb02a3ca81",
"volumeFormatted": "1"
}
],
"fromTimestamp": "2026-09-07T03:00:00.000Z",
"schemaVersion": "2.2",
"transferCount": 1,
"uniqueSenders": 1,
"medianTransfer": "1000000000000000000",
"uniqueReceivers": 1,
"volumeFormatted": "1",
"medianTransferFormatted": "1"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"chain"
],
"properties": {
"chain": {
"enum": [
"polygon"
],
"type": "string",
"description": "Polygon mainnet only."
},
"window": {
"enum": [
"24h"
],
"type": "string",
"default": "24h",
"description": "Approximately 24 hours in whole finalized hourly buckets."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"schemaVersion",
"token",
"generatedAt",
"notice",
"termsUrl",
"chain",
"chainId",
"contract",
"window",
"fromBlock",
"toBlock",
"fromTimestamp",
"toTimestamp",
"transferCount",
"uniqueSenders",
"uniqueReceivers",
"volume",
"volumeFormatted",
"medianTransfer",
"medianTransferFormatted",
"topReceivers",
"definitions",
"observedAt",
"expiresAt"
],
"properties": {
"chain": {
"type": "string",
"const": "polygon"
},
"token": {
"type": "object",
"required": [
"symbol",
"decimals"
],
"properties": {
"symbol": {
"type": "string",
"const": "JPYC"
},
"decimals": {
"type": "integer",
"const": 18
}
},
"additionalProperties": false
},
"notice": {
"type": "string",
"const": "onchain-facts-only",
"description": "On-chain facts computed hourly from finalized Polygon blocks. Informational only; not financial advice. Full terms at termsUrl."
},
"volume": {
"type": "string",
"pattern": "^[0-9]+$"
},
"window": {
"type": "string",
"const": "24h"
},
"chainId": {
"type": "integer",
"const": 137
},
"toBlock": {
"type": "string",
"pattern": "^[0-9]+$"
},
"contract": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"termsUrl": {
"type": "string",
"format": "uri"
},
"expiresAt": {
"type": "string",
"format": "date-time"
},
"fromBlock": {
"type": "string",
"pattern": "^[0-9]+$"
},
"observedAt": {
"type": "string",
"format": "date-time"
},
"definitions": {
"type": "object",
"required": [
"eligible",
"countUnit",
"median"
],
"properties": {
"median": {
"type": "string",
"const": "floored atomic average for even counts"
},
"eligible": {
"type": "string",
"const": "positive-value transfers with distinct sender and receiver, excluding the zero address"
},
"countUnit": {
"type": "string",
"const": "events"
}
},
"additionalProperties": false
},
"generatedAt": {
"type": "string",
"format": "date-time"
},
"toTimestamp": {
"type": "string",
"format": "date-time"
},
"topReceivers": {
"type": "array",
"items": {
"type": "object",
"required": [
"address",
"count",
"volume",
"volumeFormatted"
],
"properties": {
"count": {
"type": "integer",
"minimum": 1
},
"volume": {
"type": "string",
"pattern": "^[0-9]+$"
},
"address": {
"type": "string",
"pattern": "^0x[a-f0-9]{40}$"
},
"volumeFormatted": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)?$"
}
},
"additionalProperties": false
},
"maxItems": 5
},
"fromTimestamp": {
"type": "string",
"format": "date-time"
},
"schemaVersion": {
"type": "string",
"const": "2.2"
},
"transferCount": {
"type": "integer",
"minimum": 0
},
"uniqueSenders": {
"type": "integer",
"minimum": 0
},
"medianTransfer": {
"type": "string",
"pattern": "^[0-9]+$"
},
"uniqueReceivers": {
"type": "integer",
"minimum": 0
},
"volumeFormatted": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)?$"
},
"medianTransferFormatted": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)?$"
}
},
"additionalProperties": false
}
}
}
}
}
}
},
"x402Version": 2
}Can I trust it score from our own monitoring
score from our own monitoring
87/100 Solid
#71 of 362 in Data. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.
- Reliability
- 100% uptime since 09-14
- Compliance
- A 14/14 checks pass
- Price
- $0.002 to $0.04 p25 in Data
- Risk
- clean no risk flag
- Traction
- $0.18 30d 9 buyers, top buyer 37% (address, not entity)
- Last change
- schema changed 23d ago 1 in 30d
14/14 compliance checks
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
402 terms unchanged since 2026-09-17. Last up 2026-10-10.
── Site signals
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
How the score works
What the score read on this service: status online, 100% uptime 30d, 416ms response p95, x402 compliance 14 of 14, $0.002 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.
The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.
Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.
It is a score inside Data, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 362 listings, this one among them: the same 362 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.
Settled via coinbase ($0.18, 27 tx). Traction is a conservative undercount; first settlement seen 2026-07-18.
All measured facts
What it does
Live on-chain data about JPYC (the Japanese yen stablecoin) and curated Japan Web3 directories for AI agents, paid per request in USDC on Base via standard x402 (exact scheme, facilitator: Coinbase CDP). Endpoints: JPYC supply by chain, wallet balance, recent transfers, 24-hour network activity, weekly change feeds for JPYC services and Japanese stablecoin payment providers, and sourced directories of Japan Web3 services and JPYC-accepting stores. Facts only, no advice; every directory row has an official source URL and last-verified date.
OpenPay is a listed x402 Data API. Captured payment terms name Base. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.
Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.
Page rendered at . This response time is separate from the observation and computation times attached to each measurement.
Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.
Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.
Observed daily coverage: 2026-09-11 to 2026-10-10 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Latest settlement in the assessment: . Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.
Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.
x402 List home · Services · Data
- uptime · latest daily rollup
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 416ms
- avg response
- 337ms
- total checks
- 2,312
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
- price (min)
- $0.002
- price (max)
- $0.04
- category percentile (min)
- p25 in Data
- category percentile (max)
- p51 in Data
- endpoints / prices
- 9 / 5
- model
- tiered
- stability
- 100%
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- -
- registrar
- -
- hosting
- custom
- domain created
- ---
Identity facts, not a risk score.
- assessment volume 30d
- $0.18
- exact assessment volume 30d (USD)
- 0.181
- assessment recorded at (UTC)
- 2026-10-10T12:13:06.615Z
- buyers 30d
- 9
- settlements 30d
- 27
- measured since
- 2026-07-18 (start of our harvest window)
- last settlement
- 2026-10-09
- top buyer share
- 37% of 30d volume (address, not entity)
- top 3 buyers share
- -
- concentrated volume
- no
- trend 7d vs 30d
- 2.15x the 30d daily rate
- networks
- eip155:8453
- volume all-time
- $0.71
- settlements all-time
- 77
- median settlement 30d
- $0.01
- max settlement 30d
- $0.01
Assessment volume uses the latest 30d assessment. Over time sums daily address snapshots, rounded to cents and refreshed separately. The two sources can differ in timing, precision and shared-address attribution. Amounts use cents for comparison; known sub-cent values keep up to 12 significant digits. The exact stored assessment value is shown above.
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share lowers the on-chain traction part of the ranking score behind this page's verdict and /best, by up to half when one address holds all 30d volume. The Recommended and Highest volume sorts of the services list do not use it; they use the Concentrated volume rule instead.
- member since
- 2026-09-14
Recent checks
| Checked at (UTC) | Status | HTTP | Response | Endpoints |
|---|---|---|---|---|
| Online | 402 | 295ms | 9 | |
| Online | 402 | 242ms | 9 | |
| Online | 402 | 283ms | 9 | |
| Online | 402 | 271ms | 9 | |
| Online | 402 | 218ms | 9 | |
| Online | 402 | 164ms | 9 | |
| Online | 402 | 286ms | 9 | |
| Online | 402 | 178ms | 9 | |
| Online | 402 | 163ms | 9 | |
| Online | 402 | 243ms | 9 | |
| Online | 402 | 293ms | 9 | |
| Online | 402 | 186ms | 9 | |
| Online | 402 | 139ms | 9 | |
| Online | 402 | 185ms | 9 | |
| Online | 402 | 226ms | 9 | |
| Online | 402 | 219ms | 9 | |
| Online | 402 | 179ms | 9 | |
| Online | 402 | 182ms | 9 |
Changes1 in 30d
| Observed at (UTC) | Change | Evidence |
|---|---|---|
| schema changed | schema added schema added schema added schema added schema added schema added schema added schema added schema added |
Over time
On-chain volume daily snapshots, USD 30d: $0.18, peak $0.03 on 09-28
volume no data in the payload
Distinct buyers per dayDistinct buyers per day
Uptime 0 of 28 completed days below 100%
- Volume 30d
- $0.18
- Uptime
- 0 of 28 completed days below 100%
More charts
Response time daily average, ms min 179ms, avg 331ms, max 544ms
09-11 to 10-10* UTC
Scores over time
x402 compliance low 14/14, high 14/14
09-11 to 10-10* UTC
Price percentile in Data own low to high; exact values below
09-11 to 10-10* UTC
Site signals present (of 6) own low to high; exact values below
09-11 to 10-10* UTC
Scores: one day per column, 09-11 to 10-10*, on the columns of Response time. The checklist grew from 11 to 14 checks on 2026-07-28, before this window. Pillar lines use their own low and high. Exact dated readings are available in each readout and in Values.
Each series spans only the dates it has data for. Every series is also served as JSON at /api, /scores, /volume and /buyers.
Values
* today so far, partial (UTC).
The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.
Daily snapshot total, 30d: $0.18, peak $0.03 on 09-28. The visible 30d total in Traction comes from the latest assessment. These sources can differ in their window, refresh time, cent rounding and shared-address attribution.
Daily address snapshots: 2026-09-11 to 2026-10-10 UTC; * today so far, partial (UTC). Daily snapshots store cents. A recorded $0.00 with settlements cannot distinguish exact zero from volume rounded away. Lost precision is unavailable here. † marks a recorded $0.00 with settlements.
Settlement volume uses the stored USD valuation of tracked payments; it is distinct from token quantities. USD-pegged assets are valued at 1 USD per token in these rollups. The measured settlement floor does not cover all payments to this service.
Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.
| Day | Volume | Buyers | Settlements | Uptime | Response | Compliance | Price percentile | Site signals |
|---|---|---|---|---|---|---|---|---|
| 2026-09-12 | $0.00 recorded† | 1 | 1 | no data | no data | no data | no data | no data |
| 2026-09-13 | no data | no data | no data | no data | no data | no data | no data | no data |
| 2026-09-14 | $0.01 | 1 | 2 | 100% | 193.94ms | 14/14 | p25 | 5/6 |
| 2026-09-15 | no data | no data | no data | 100% | 179.23ms | 14/14 | p24 | 5/6 |
| 2026-09-16 | no data | no data | no data | 100% | 266.04ms | 14/14 | p25 | 5/6 |
| 2026-09-17 | $0.00 recorded† | 1 | 1 | 100% | 362.63ms | 14/14 | p25 | 5/6 |
| 2026-09-18 | no data | no data | no data | 100% | 375.98ms | 14/14 | p25 | 5/6 |
| 2026-09-19 | no data | no data | no data | 100% | 391.73ms | 14/14 | p25 | 5/6 |
| 2026-09-20 | no data | no data | no data | 100% | 304.06ms | 14/14 | p25 | 5/6 |
| 2026-09-21 | no data | no data | no data | 100% | 488.11ms | 14/14 | p25 | 5/6 |
| 2026-09-22 | no data | no data | no data | 100% | 544.46ms | 14/14 | p25 | 5/6 |
| 2026-09-23 | no data | no data | no data | 100% | 470.54ms | 14/14 | p25 | 5/6 |
| 2026-09-24 | no data | no data | no data | 100% | 371.88ms | 14/14 | p25 | 5/6 |
| 2026-09-25 | no data | no data | no data | 100% | 383.84ms | 14/14 | p25 | 5/6 |
| 2026-09-26 | no data | no data | no data | 100% | 409.51ms | 14/14 | p24 | 5/6 |
| 2026-09-27 | $0.01 | 1 | 1 | 100% | 336.42ms | 14/14 | p24 | 5/6 |
| 2026-09-28 | $0.03 | 2 | 4 | 100% | 382.50ms | 14/14 | p24 | 5/6 |
| 2026-09-29 | $0.02 | 1 | 2 | 100% | 342.52ms | 14/14 | p24 | 5/6 |
| 2026-09-30 | $0.01 | 1 | 1 | 100% | 300.39ms | 14/14 | p24 | 5/6 |
| 2026-10-01 | no data | no data | no data | 100% | 322.92ms | 14/14 | p24 | 5/6 |
| 2026-10-02 | $0.01 | 1 | 1 | 100% | 302.87ms | 14/14 | p24 | 5/6 |
| 2026-10-03 | $0.01 | 1 | 1 | 100% | 377.60ms | 14/14 | p24 | 5/6 |
| 2026-10-04 | $0.01 | 1 | 2 | 100% | 313.02ms | 14/14 | p24 | 5/6 |
| 2026-10-05 | $0.02 | 1 | 2 | 100% | 237.19ms | 14/14 | p25 | 5/6 |
| 2026-10-06 | $0.00 recorded† | 1 | 1 | 100% | 262.63ms | 14/14 | p25 | 5/6 |
| 2026-10-07 | no data | no data | no data | 100% | 240.66ms | 14/14 | p25 | 5/6 |
| 2026-10-08 | $0.03 | 2 | 5 | 100% | 288.34ms | 14/14 | p25 | 5/6 |
| 2026-10-09 | $0.02 | 1 | 3 | 100% | 253.13ms | 14/14 | p25 | 5/6 |
| 2026-10-10* | $0.00 recorded† | 1 | 1 | 100% | 236.41ms | 14/14 | p25 | 5/6 |
Alternatives in Data
5 of 361 other ranked services in Data, ordered by the same measured score.
Own this service?
Keep this listing accurate. Ownership is proven with a domain check and every change is reviewed by hand.
Update this listingEarn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.
Verify this service ($0.25)Embed a badge
HTML
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Delisting
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