payment-ready until 2026-10-11
Keyless Arc mainnet (chainId 5042) JSON-RPC + early-chain data endpoints for AI agents. Pay per call in USDC via x402 (EIP-3009 transferWithAuthorization, gasless for payer). No API key, no account. Endpoints: /arc (JSON-RPC, 0.002-0.005 USDC/call by tier), /deployments (new contract feed), /alerts (address flow delta feed), /audit (token hygiene report), /whales (flow ranking), /wallet-report, /token-report. Free tier: 50 calls/day per wallet via X-From header.
Pay from $0.003 to $0.05 per request in UNKNOWN, settled onchain via the x402 protocol, no signup, no API key needed.
VERDICT
ranking generation 3solid 78/100 #49 of 63 in Blockchain by measured score
What the score read on this service: status online, 100% uptime, latest daily rollup (no 30d window yet), 315ms response p95, x402 compliance 13 of 14, $0.003 price against the category, no known payTo, so no on-chain traction to read. 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.
It is a score inside Blockchain, 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 63 listings, this one among them. That set is wider than the 63 the position above is counted against, 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.
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.
ALTERNATIVES IN BLOCKCHAIN
Other Blockchain services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).
| SERVICE | BAND | SCORE | UPTIME 30D | VOL 30D |
|---|---|---|---|---|
| Loyal Spark | strong | 96 | 100% | $116.83 |
| OneSource | strong | 96 | 100% | $110.22 |
| true402 | solid | 90 | 99.9% | $0.35 |
| SolSigs | solid | 88 | 100% | $0 |
| GPUOps Blockchain Data MCP | solid | 88 | 100% | $0 |
5 of 62 other ranked services in Blockchain · see the whole category
ASSESSMENT
updated 2h agoThe parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.
reliability 100%
- uptime · latest daily rollup
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 315ms
- avg response
- 315ms
- total checks
- 1
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
compliance C (13/14): EIP-712 domain parameters present on every EVM entry
13 of 14 x402 conformance checks pass; failing: EIP-712 domain parameters present on every EVM entry. Full checklist below.
signability route not signable
At least one EVM route on this service returns its 402 without the EIP-712 domain parameters (extra.name and extra.version), so a standard x402 client cannot build the signature for that route.
Measured on the last 402 envelope captured from this service. It is a fact about the envelope, not a judgement on the service or its operator.
This is the only conformance check that caps the compliance grade, at C.
price $0.003 to $0.05 (p31 in Blockchain)
- price (min)
- $0.003
- price (max)
- $0.05
- category percentile (min)
- p31 in Blockchain
- category percentile (max)
- p62 in Blockchain
- endpoints / prices
- 7 / 5
- model
- tiered
- stability
- 100%
risk clean
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.
traction ---
No settlement address is mapped for this service yet, so on-chain volume cannot be measured. Shown as unmeasured, not zero.
WHAT IT DOES
ai-derivedNo AI synthesis has been produced for this service yet.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| GET | /alerts | Keyless Arc mainnet JSON-RPC (chainId 5042) by Percall. Pay per call in native USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io | $0.005 | UNKNOWN | header | |
| GET | /arc | Keyless Arc mainnet JSON-RPC (chainId 5042) by Percall. Pay per call in native USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io | $0.003 | UNKNOWN | header | |
| GET | /audit | Keyless Arc mainnet JSON-RPC (chainId 5042) by Percall. Pay per call in native USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io | $0.02 | UNKNOWN | header | |
| GET | /deployments | Keyless Arc mainnet JSON-RPC (chainId 5042) by Percall. Pay per call in native USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io | $0.01 | UNKNOWN | header | |
| GET | /token-report | Keyless Arc mainnet JSON-RPC (chainId 5042) by Percall. Pay per call in native USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io | $0.05 | UNKNOWN | header | |
| GET | /wallet-report | Keyless Arc mainnet JSON-RPC (chainId 5042) by Percall. Pay per call in native USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io | $0.05 | UNKNOWN | header | |
| GET | /whales | Keyless Arc mainnet JSON-RPC (chainId 5042) by Percall. Pay per call in native USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io | $0.005 | UNKNOWN | header |
7 endpoints
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /alerts returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
// request
curl -i 'https://api.percall.io/alerts'
// 402 response (captured by monitor) · 7 payloads · click to expand
[
{
"error": "x402 pay-per-call (0.005 USDC)",
"accepts": [
{
"tags": [
"rpc",
"evm",
"jsonrpc",
"arc",
"pay-per-call",
"no-key",
"stablecoin",
"gas-usdc",
"x402",
"mcp",
"ai-agent"
],
"asset": "0x3600000000000000000000000000000000000000",
"payTo": "0x282d1999c5e7f87d603700d11ac1ee931537aa89",
"amount": "5000",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://api.percall.io/alerts",
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/alerts",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.percall.io/alerts",
"mimeType": "application/json",
"description": "Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402"
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/alerts",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "X-PAYMENT required",
"accepts": [
{
"tags": [
"rpc",
"evm",
"jsonrpc",
"arc",
"pay-per-call",
"no-key",
"stablecoin",
"gas-usdc",
"x402",
"mcp",
"ai-agent"
],
"asset": "0x3600000000000000000000000000000000000000",
"payTo": "0x282d1999c5e7f87d603700d11ac1ee931537aa89",
"amount": "3000",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://api.percall.io/arc",
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/arc",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"maxAmountRequired": "3000",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.percall.io/arc",
"mimeType": "application/json",
"description": "Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402"
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/arc",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "x402 pay-per-call (0.01 USDC)",
"accepts": [
{
"tags": [
"rpc",
"evm",
"jsonrpc",
"arc",
"pay-per-call",
"no-key",
"stablecoin",
"gas-usdc",
"x402",
"mcp",
"ai-agent"
],
"asset": "0x3600000000000000000000000000000000000000",
"payTo": "0x282d1999c5e7f87d603700d11ac1ee931537aa89",
"amount": "10000",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://api.percall.io/deployments",
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/deployments",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.percall.io/deployments",
"mimeType": "application/json",
"description": "Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402"
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/deployments",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "x402 pay-per-call (0.02 USDC)",
"accepts": [
{
"tags": [
"rpc",
"evm",
"jsonrpc",
"arc",
"pay-per-call",
"no-key",
"stablecoin",
"gas-usdc",
"x402",
"mcp",
"ai-agent"
],
"asset": "0x3600000000000000000000000000000000000000",
"payTo": "0x282d1999c5e7f87d603700d11ac1ee931537aa89",
"amount": "20000",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://api.percall.io/audit",
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/audit",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.percall.io/audit",
"mimeType": "application/json",
"description": "Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402"
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/audit",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "x402 pay-per-call (0.005 USDC)",
"accepts": [
{
"tags": [
"rpc",
"evm",
"jsonrpc",
"arc",
"pay-per-call",
"no-key",
"stablecoin",
"gas-usdc",
"x402",
"mcp",
"ai-agent"
],
"asset": "0x3600000000000000000000000000000000000000",
"payTo": "0x282d1999c5e7f87d603700d11ac1ee931537aa89",
"amount": "5000",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://api.percall.io/whales",
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/whales",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.percall.io/whales",
"mimeType": "application/json",
"description": "Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402"
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/whales",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "x402 pay-per-call (0.05 USDC)",
"accepts": [
{
"tags": [
"rpc",
"evm",
"jsonrpc",
"arc",
"pay-per-call",
"no-key",
"stablecoin",
"gas-usdc",
"x402",
"mcp",
"ai-agent"
],
"asset": "0x3600000000000000000000000000000000000000",
"payTo": "0x282d1999c5e7f87d603700d11ac1ee931537aa89",
"amount": "50000",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://api.percall.io/wallet-report",
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/wallet-report",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.percall.io/wallet-report",
"mimeType": "application/json",
"description": "Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402"
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/wallet-report",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "x402 pay-per-call (0.05 USDC)",
"accepts": [
{
"tags": [
"rpc",
"evm",
"jsonrpc",
"arc",
"pay-per-call",
"no-key",
"stablecoin",
"gas-usdc",
"x402",
"mcp",
"ai-agent"
],
"asset": "0x3600000000000000000000000000000000000000",
"payTo": "0x282d1999c5e7f87d603700d11ac1ee931537aa89",
"amount": "50000",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://api.percall.io/token-report",
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/token-report",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009. No API key, sub-second finality. Free: 50 calls/day per wallet (X-From). Prepaid credits via /topup. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.percall.io/token-report",
"mimeType": "application/json",
"description": "Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402"
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"rpc",
"evm",
"jsonrpc",
"pay-per-call",
"no-key",
"stablecoin",
"x402",
"mcp"
],
"type": "http",
"resource": "https://api.percall.io/token-report",
"description": "Keyless Arc mainnet (chainId 5042) JSON-RPC by Percall. Pay per call in USDC via EIP-3009, x402 protocol. No API key. Site: https://percall.io",
"service_name": "Percall - Arc agent data (pay per call)",
"routeTemplate": "/arc"
},
"schema": {
"properties": {
"input": {
"properties": {
"body": {
"type": "object",
"required": [
"jsonrpc",
"method"
],
"properties": {
"id": {
"type": "integer",
"example": 1
},
"method": {
"type": "string",
"description": "JSON-RPC method (e.g. eth_blockNumber, eth_call, eth_getLogs)"
},
"params": {
"type": "array",
"description": "JSON-RPC params array"
},
"jsonrpc": {
"type": "string",
"const": "2.0"
}
}
}
}
},
"output": {
"properties": {
"example": {
"type": "object",
"properties": {
"id": {
"type": "integer"
},
"error": {
"type": "object"
},
"result": {
"description": "JSON-RPC result"
},
"jsonrpc": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
}
] OVER TIME
All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/percall-arc-agent-data-pay-per-call/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
UPTIME
30D UPTIME 100%
RESPONSE TIME
AVG RESP 302ms
PRICE (captured 402, USD)
Median across 7 endpoints. Use the selector to isolate one.
SUB-SCORES (uptime + x402 compliance)
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
VOLUME (on-chain settlement, USD)
No settlement address is mapped for this service yet, so on-chain volume cannot be measured. Shown as unmeasured, not zero.
DISTINCT BUYERS
No settlement address is mapped for this service yet, so distinct on-chain buyers cannot be measured. Shown as unmeasured, not zero.
COMPLIANCE
13/14 checks pass · grade C · failing: EIP-712 domain parameters present on every EVM entrylast 402 captured 2026-10-04 · last up 2026-10-04
- 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
SITE PILLARS
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
recent checks (7) live · click to expand
TIME STATUS RESP CAUSE
● OK 260ms
● OK 255ms
● OK 328ms
● OK 230ms
● OK 274ms
● OK 450ms
● OK 315ms
EMBED THIS BADGE
// HTML
<a href="https://x402-list.com/services/percall-arc-agent-data-pay-per-call?utm_source=badge&utm_medium=referral&utm_campaign=embed"> <img src="https://x402-list.com/badge/percall-arc-agent-data-pay-per-call.svg" alt="percall — Arc agent data (pay per call) listed on x402-list" height="28"> </a>
// Markdown
[](https://x402-list.com/services/percall-arc-agent-data-pay-per-call?utm_source=badge&utm_medium=referral&utm_campaign=embed)
// HTML · live uptime variant
<a href="https://x402-list.com/services/percall-arc-agent-data-pay-per-call?utm_source=badge&utm_medium=referral&utm_campaign=embed"> <img src="https://x402-list.com/badge/percall-arc-agent-data-pay-per-call.svg?data=uptime" alt="percall — Arc agent data (pay per call) uptime on x402-list" height="28"> </a>