ChainWard
payment-ready until 2026-10-12
On-chain risk checks an agent pays for per call: a counterparty report for a Base or BNB Chain address ($0.05), where an x402 seller's buyers get their USDC ($0.10), and the datasets behind published investigations ($10).
Call it x402 v2
x402 v2
- Base URL
- https://api.chainward.ai
- Payment
- x402 v2, header channel
$ curl -i 'https://api.chainward.ai/api/paid/termix-wallets/file' An unpaid request returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
Endpoints 3 paid routes on api.chainward.ai
Prices as captured in the 402 response: median $0.10 across the 3 endpoints, unchanged since first capture.
Example 402 response
Endpoints and prices
| Method | Path | Description | Price | Network | Asset | 402 channel | Captured |
|---|---|---|---|---|---|---|---|
| GET | / | No description | $10.00 | Base | USDC | header | since 10-05 |
| GET | / | No description | $0.10 | Base | USDC | header | since 10-05 |
| GET | / | No description | $0.05 | Base | USDC | header | since 10-05 |
Payment evidence
402 payload captured at . Check evidence JSON · Measurement methodology.
First of 3 payloads captured by the monitor.
147 lines, scroll inside
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xf7Ee65130Fb2B3bb42Cc5cbFED085d7D482667cD",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.chainward.ai/api/risk/x402",
"tags": [
"base",
"risk",
"counterparty",
"agents",
"eas",
"attestation"
],
"mimeType": "application/json",
"description": "Fresh on-chain risk report for a Base or BNB Chain (?chain=bsc) address before you pay it: neutral signal band, every flag with its evidence and source, what was not assessed, and the EAS attestation if one exists. Never a safety verdict.",
"serviceName": "ChainWard counterparty check"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"address": "0x4baadba26c3c0bdef9e8faf173925d463aa53bb2"
}
},
"output": {
"type": "json",
"example": {
"data": {
"report": {
"band": "high-signal",
"chain": "base",
"flags": [
{
"id": "stranded_value",
"title": "USDC balance held in a dormant wallet",
"source": "https://base.blockscout.com/address/0x4baadba26c3c0bdef9e8faf173925d463aa53bb2",
"evidence": "Holds 5451.386272 USDC while classified dormant",
"severity": "high"
}
],
"address": "0x4baadba26c3c0bdef9e8faf173925d463aa53bb2",
"freshness": {
"ttl_state": "fresh",
"as_of_block": 51846337,
"generated_at": "2026-09-27T04:07:05.375Z"
},
"disclaimer": "Risk flags from on-chain behavior only. ChainWard cannot see social engineering, off-chain agreements, or intent. Absence of flags is not a guarantee of safety.",
"attestation": {
"uid": "0xda5dc4ca34777d908c3f16fc9eb10a75325d2c83683adb7539c8bc4ade6f6560",
"explorer_url": "https://base.easscan.org/attestation/view/0xda5dc4ca34777d908c3f16fc9eb10a75325d2c83683adb7539c8bc4ade6f6560"
},
"not_assessed": [
"Contract bytecode or source auditing",
"Social-engineering or off-chain reputation"
]
},
"status": "ready"
},
"success": true
}
}
},
"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": [
"base",
"bsc"
],
"type": "string",
"default": "base",
"description": "Chain the address is on. Payment is USDC on Base either way."
},
"address": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Address to check"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
} Other captured 402 responses (2)
Captured payload 2 of 3
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xf7Ee65130Fb2B3bb42Cc5cbFED085d7D482667cD",
"amount": "100000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.chainward.ai/api/risk/seller-demand",
"tags": [
"base",
"bsc",
"x402",
"seller",
"demand",
"wash",
"counterparty",
"agents"
],
"mimeType": "application/json",
"description": "Where a seller's buyers get their stablecoins, on Base or BNB Chain (?chain=bsc): how much of its top buyers' money traces back to the seller, how much it pays back, and whether one wallet funds most buyers. Describes money flows, never intent.",
"serviceName": "ChainWard x402 seller check"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"address": "0x68396bd35874695ad86cd29410bd80a550991a2b"
}
},
"output": {
"type": "json",
"example": {
"data": {
"sample": {
"buyers": 500,
"capped": true,
"inflow_transfers": 1000
},
"address": "0x68396bd35874695ad86cd29410bd80a550991a2b",
"signals": [
{
"id": "buyers_funded_by_seller",
"title": "Most checked buyers' USDC traces back to this address",
"evidence": "30 of 30 top buyers reach this address within 3 hops of their largest funders (100% of their volume)."
},
{
"id": "common_funder",
"title": "One wallet funds most checked buyers",
"evidence": "0x82b551e820efc3503a3a27fc450e07e328daf91c is the largest funder of 50% of the top buyers checked."
}
],
"disclaimer": "Describes where stablecoins moved on this chain, not why. A common funder can be a legitimate faucet, exchange or custodian. Not a safety verdict.",
"walk_stops": {},
"window_days": 30,
"seller_funded": {
"hops": {
"3": 30
},
"buyers": 30,
"volume_share": 1
},
"buyers_checked": 30,
"paid_back_share": 0,
"top_buyer_share": 0.037,
"common_first_funder": {
"address": "0x82b551e820efc3503a3a27fc450e07e328daf91c",
"buyer_share": 0.5
},
"via_intermediary_share": 0
},
"success": true
}
}
},
"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": [
"base",
"bsc"
],
"type": "string",
"default": "base",
"description": "Chain the address is on. Payment is USDC on Base either way."
},
"address": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Address to check"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 3 of 3
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xf7Ee65130Fb2B3bb42Cc5cbFED085d7D482667cD",
"amount": "10000000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.chainward.ai/api/paid/termix-wallets/file",
"tags": [
"base",
"dataset",
"sybil",
"airdrop",
"points",
"agents"
],
"mimeType": "application/json",
"description": "The full dataset behind a published ChainWard decode (e.g. every wallet in an incentive-farming audit, tiered, with the transactions behind each one). CSV.",
"serviceName": "ChainWard dataset"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"pathParams": {
"slug": "termix-wallets"
},
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"contentType": "text/csv"
}
}
},
"schema": {
"type": "object",
"$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"
},
"pathParams": {
"type": "object",
"required": [
"slug"
],
"properties": {
"slug": {
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{0,59}$",
"description": "File slug from GET /api/paid"
}
}
},
"queryParams": {
"type": "object",
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
},
"routeTemplate": "/api/paid/:slug/file"
}
},
"x402Version": 2
}Can I trust it score from our own monitoring
score from our own monitoring
#48 of 122 in Verification. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.
- Reliability
- 100% uptime 30d
- Compliance
- A 14/14 checks pass
- Price
- $0.05 to $10.00 p80 in Verification
- Risk
- clean no risk flag
- Traction
- $0.00 assessment 30d 0 buyers
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 2026-10-05. Last up 2026-10-05.
── 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, latest daily rollup (no 30d window yet), 239ms response p95, x402 compliance 14 of 14, $0.05 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 Verification, 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 122 listings, this one among them: the same 122 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.
Traction is a conservative undercount.
All measured facts
What it does
On-chain risk checks an agent pays for per call: a counterparty report for a Base or BNB Chain address ($0.05), where an x402 seller's buyers get their USDC ($0.10), and the datasets behind published investigations ($10). Paid in USDC on Base; a check that fails is never charged. Reports that flag behavior are EAS attestations on Base.
ChainWard is a listed x402 Verification 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: 2026-10-05 to 2026-10-05 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. 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 · Verification
- uptime · latest daily rollup
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 239ms
- avg response
- 239ms
- total checks
- 1
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
- price (min)
- $0.05
- price (max)
- $10.00
- category percentile (min)
- p80 in Verification
- category percentile (max)
- p97 in Verification
- endpoints / prices
- 3 / 3
- 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
- 216d
- registrar
- Cloudflare, Inc
- hosting
- custom
- domain created
- 2026-03-02
Identity facts, not a risk score.
- assessment volume 30d
- $0.00
- exact assessment volume 30d (USD)
- 0
- assessment recorded at (UTC)
- 2026-10-05T08:03:05.248Z
- buyers 30d
- 0
- settlements 30d
- 0
- measured since
- --- (start of our harvest window)
- last settlement
- ---
- top buyer share
- -
- trend 7d vs 30d
- -
- networks
- eip155:8453
- volume all-time
- $0
- settlements all-time
- 0
- median settlement 30d
- -
- max settlement 30d
- -
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 is part of the ranking score: a higher share lowers the traction part of the score, by up to half when one address holds all 30d volume.
- member since
- 2026-10-05
Recent checks
| Checked at (UTC) | Status | HTTP | Response | Endpoints |
|---|---|---|---|---|
| Online | 402 | 212ms | 3 | |
| Online | 402 | 563ms | 3 | |
| Online | 402 | 204ms | 3 | |
| Online | 402 | 627ms | 3 | |
| Online | 402 | 317ms | 3 | |
| Online | 402 | 239ms | 3 |
Over time
- Snapshots 7d
- $0.00
- Uptime
- no completed-day data
More charts
10-05* UTC
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, no volume data in the last 7d. 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: 2026-10-05 to 2026-10-05 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.
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 |
|---|---|---|---|---|---|---|---|---|
| 2026-10-05* | no data | no data | no data | 100% | 390.00ms | 14/14 | p80 | 3/6 |
Alternatives in Verification
5 of 121 other ranked services in Verification, 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.
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Delisting
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