Agent Verification Utility
Verify that supplied x402 payment, resource and delivery records agree before accepting the result.
OtherLiveeip155:8453Exactvia cdp
VerificationJsonSigned-evidenceMcpAgents
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far.
$0.47
Verified settled volume
47 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.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-14 16:08Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x4D7d842536De9Eb491AE2300126B3CDdE7B0aDE3The 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 0x4D7d…0aDE3. The signed payment is good for 5 minutes.
- Paid to
- 0x4D7d…0aDE3
- 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",
"quoteId": "qte_51312c75-6534-4b0a-918c-afaac0bf960b",
"version": "2",
"mockMode": false,
"requestHash": "sha256:f9762330c1c9fadc8f7126e01e3b823c50297329de5736d6c7408a5984c1cf5e",
"bindingDigest": "sha256:0f300c6d596ebf5b3efb2239d84140001b2fb779a41165c872e5789bb3a12e89",
"policyVersion": "agent-economy/precheck-policy/2.0",
"evidenceDigest": "sha256:f0dba6a8aba27d498fd40732f4f804160f2d82aa4247fd2335ef8f33b751dbfb",
"priceCapAtomic": "10000",
"quoteExpiresAt": "2026-09-14T16:13:52.100Z",
"precheckReceiptDigest": "sha256:46dcfeb9495af1fd591447414866007f0915b8f5fdc20137091e4f4dabd80140"
},
"payTo": "0x4D7d842536De9Eb491AE2300126B3CDdE7B0aDE3",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"request": {
"evidence": {
"media_type": "application/json",
"content_base64": "eyJpbnZvaWNlIjp7ImN1cnJlbmN5IjoiVVNEIiwidG90YWwiOjEyNTB9fQ=="
},
"assertions": [
{
"op": "json_pointer_equals",
"path": "/invoice/currency",
"expected": "USD"
}
],
"client_request_id": "agent-example-001"
},
"spend_policy": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"pay_to": "0x4D7d842536De9Eb491AE2300126B3CDdE7B0aDE3",
"network": "eip155:8453",
"policy_version": "agent-economy/precheck-policy/2.0",
"max_amount_atomic": "10000"
},
"precheck_receipt_digest": "sha256:46dcfeb9495af1fd591447414866007f0915b8f5fdc20137091e4f4dabd80140"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"receipt": {
"delivery": "completed",
"cost_basis": "conservative_upper_bound",
"receipt_id": "rcpt_example",
"price_paid_microusd": 10000,
"paid_verification_binding": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"state": "delivered",
"pay_to": "0x4D7d842536De9Eb491AE2300126B3CDdE7B0aDE3",
"network": "eip155:8453",
"quote_id": "qte_example",
"expires_at": "2026-08-08T00:05:00.000Z",
"request_hash": "sha256:f9762330c1c9fadc8f7126e01e3b823c50297329de5736d6c7408a5984c1cf5e",
"binding_digest": "sha256:ba1748b1d09b6425af27aef50ab4dfc485c4126f59747075f8e94320ef42b12e",
"policy_version": "agent-economy/precheck-policy/2.0",
"refusal_reason": null,
"schema_version": "agent-economy/paid-verification-binding/1.0",
"evidence_digest": "sha256:f0dba6a8aba27d498fd40732f4f804160f2d82aa4247fd2335ef8f33b751dbfb",
"paid_receipt_id": "rcpt_example",
"price_cap_atomic": "10000",
"discovery_survived": true,
"quoted_amount_atomic": "10000",
"precheck_receipt_digest": "sha256:46dcfeb9495af1fd591447414866007f0915b8f5fdc20137091e4f4dabd80140"
},
"variable_cost_upper_bound_microusd": 1234,
"contribution_margin_lower_bound_microusd": 8766
},
"evidence": {
"signature": {
"alg": "Ed25519",
"kid": "https://agent-economy.kgninja.dev/agent.json#evidence-key-1",
"value_b64url": "ZXhhbXBsZQ"
},
"evidence_id": "evd_example",
"signed_payload_b64url": "ZXhhbXBsZQ"
},
"quote_id": "qte_example",
"request_hash": "sha256:f9762330c1c9fadc8f7126e01e3b823c50297329de5736d6c7408a5984c1cf5e",
"verification": {
"checks": [
{
"op": "json_pointer_equals",
"index": 0,
"passed": true
}
],
"outcome": "pass",
"executed_at": "2026-08-08T00:00:00.000Z",
"algorithm_version": "det-json-v1"
},
"transaction_id": "txn_example"
}
}
},
"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": {
"type": "object",
"required": [
"request",
"spend_policy",
"precheck_receipt_digest"
],
"properties": {
"request": {
"type": "object",
"required": [
"client_request_id",
"evidence",
"assertions"
],
"properties": {
"evidence": {
"type": "object",
"required": [
"media_type",
"content_base64"
],
"properties": {
"media_type": {
"type": "string",
"const": "application/json"
},
"content_base64": {
"type": "string",
"maxLength": 87384,
"contentEncoding": "base64",
"contentMediaType": "application/json"
}
},
"additionalProperties": false
},
"assertions": {
"type": "array",
"items": {
"oneOf": [
{
"type": "object",
"required": [
"op",
"expected_hex"
],
"properties": {
"op": {
"type": "string",
"const": "sha256_equals"
},
"expected_hex": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
}
},
"additionalProperties": false
},
{
"type": "object",
"required": [
"op",
"path"
],
"properties": {
"op": {
"type": "string",
"const": "json_pointer_exists"
},
"path": {
"type": "string",
"maxLength": 512
}
},
"additionalProperties": false
},
{
"type": "object",
"required": [
"op",
"path",
"expected"
],
"properties": {
"op": {
"type": "string",
"const": "json_pointer_equals"
},
"path": {
"type": "string",
"maxLength": 512
},
"expected": {}
},
"additionalProperties": false
},
{
"type": "object",
"required": [
"op",
"path",
"expected_type"
],
"properties": {
"op": {
"type": "string",
"const": "json_type_is"
},
"path": {
"type": "string",
"maxLength": 512
},
"expected_type": {
"enum": [
"null",
"boolean",
"number",
"string",
"array",
"object"
],
"type": "string"
}
},
"additionalProperties": false
}
]
},
"maxItems": 16,
"minItems": 1
},
"client_request_id": {
"type": "string",
"pattern": "^[A-Za-z0-9._:-]+$",
"maxLength": 64,
"minLength": 1
}
},
"additionalProperties": false
},
"spend_policy": {
"type": "object",
"required": [
"policy_version",
"max_amount_atomic",
"network",
"asset",
"pay_to"
],
"properties": {
"asset": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"pay_to": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$"
},
"network": {
"enum": [
"eip155:84532",
"eip155:8453"
],
"type": "string"
},
"policy_version": {
"type": "string",
"const": "agent-economy/precheck-policy/2.0"
},
"max_amount_atomic": {
"type": "string",
"pattern": "^[1-9][0-9]*$",
"maxLength": 16
}
},
"additionalProperties": false
},
"precheck_receipt_digest": {
"type": "string",
"pattern": "^sha256:[a-f0-9]{64}$"
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"example_usage": {
"synthetic": true,
"instruction": "Synthetic illustration only. Before purchase, POST your actual request and spend_policy to /validate-request, use its precheck_receipt.receipt_digest, and preserve both unchanged. Re-run precheck after any change. Output signatures and IDs are illustrative, not proof of payment.",
"payment_authorized": false
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-14 16:08Z
- Last indexed by Roundhouse
- 2026-09-16 01:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-14 16:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
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. 3 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 Verification Utility 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%20Verification%20Utility' 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-economy.kgninja.dev/verify-evidence, 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.