agent-contract-proof.mattskowronis.workers.dev
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MediaLiveeip155:8453Exactvia cdp
Calls · 30d
3↑ 24%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 25 snapshots so far.
$0.27
Verified settled volume
17 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-14 19:57Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x3a438B911B8E2995a9C855578F95B2889752498FThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0x3a43…2498F. The signed payment is good for 5 minutes.
- Paid to
- 0x3a43…2498F
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3a438B911B8E2995a9C855578F95B2889752498F",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://source-claim-proof.mattskowronis.workers.dev"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"checks": [
{
"id": "price",
"status": "pass",
"expected": "0.01",
"observed": "0.01",
"evidence_url": "https://example.com/v1/tool"
}
],
"verdict": "conforms",
"declared": {
"path": "/v1/tool",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"method": "POST",
"pay_to": "0x0000000000000000000000000000000000000001",
"source": "openapi",
"network": "eip155:8453",
"price_usd": "0.01",
"evidence_url": "https://example.com/openapi.json",
"input_schema_declared": true,
"output_schema_declared": true
},
"observed": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"pay_to": "0x0000000000000000000000000000000000000001",
"scheme": "exact",
"network": "eip155:8453",
"price_usd": "0.01",
"http_status": 402,
"x402_version": 2,
"amount_atomic": "10000",
"challenge_source": "header"
},
"checked_at": "2026-01-01T00:00:00.000Z",
"mismatches": [],
"target_url": "https://example.com/v1/tool",
"contract_hash": "0000000000000000000000000000000000000000000000000000000000000000",
"evidence_urls": [
"https://example.com/openapi.json",
"https://example.com/v1/tool"
],
"target_method": "POST",
"target_status": "verified",
"service_version": "1.0.0"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public HTTP or HTTPS agent/API URL. An origin URL may be resolved through discovery metadata."
},
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE"
],
"type": "string",
"description": "Optional method to probe. If omitted, the advertised method is used, then GET as a fallback."
},
"expected_hash": {
"type": "string",
"pattern": "^[a-fA-F0-9]{64}$",
"description": "Optional previous contract_hash. A mismatch proves the public contract changed."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"verdict",
"target_url",
"target_method",
"target_status",
"declared",
"observed",
"checks",
"mismatches",
"evidence_urls",
"checked_at",
"contract_hash",
"service_version"
],
"properties": {
"checks": {
"type": "array",
"items": {
"type": "object"
}
},
"verdict": {
"enum": [
"conforms",
"mismatch",
"unreachable",
"insufficient_evidence"
],
"type": "string"
},
"declared": {
"type": "object",
"description": "Normalized public Agent Card or OpenAPI declaration."
},
"observed": {
"type": "object",
"description": "Normalized live HTTP/x402 challenge."
},
"checked_at": {
"type": "string"
},
"mismatches": {
"type": "array",
"items": {
"type": "string"
}
},
"target_url": {
"type": "string"
},
"contract_hash": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"evidence_urls": {
"type": "array",
"items": {
"type": "string"
}
},
"target_method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE"
],
"type": "string"
},
"target_status": {
"enum": [
"verified",
"unreachable",
"blocked",
"unsupported",
"insufficient_evidence"
],
"type": "string"
},
"service_version": {
"type": "string"
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-14 19:57Z
- Last indexed by Roundhouse
- 2026-09-24 08:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-22 06:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 404
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 25 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service agent-contract-proof.mattskowronis.workers.dev and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=agent-contract-proof.mattskowronis.workers.dev' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://agent-contract-proof.mattskowronis.workers.dev/v1/verify, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.