Orcpin
Signed four-part audit of one x402 endpoint, by buying from it: the quote (what the 402 asks, and whether the seller's manifest and public catalog agree), real purchases with Orcpin's audit wallet (quoted vs signed vs settled vs chain vs delivered; replay and bad-payment behaviour), the door's inbound books from the chain (settlements, revenue, distinct and repeat payers), and unit cost against priced doors listed. Ed25519-signed and logged; facts, no verdict. No purchase settled, no charge.
TradingLiveeip155:8453Exactvia cdp
Orcpin LedgerAuditx402EndpointSeller
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 snapshots so far.
$158.61
Verified settled volume
137 settlements proven x402 by their on-chain EIP-3009 marker.
$50.00
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-16 04:55Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x8B1CF12e7efe6AEA59cD1124eBbe7709E3Ac6085The 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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"docs": {
"catalog": "https://orcpin.dev/catalog",
"openapi": "https://orcpin.dev/openapi.json",
"methodology": "https://orcpin.dev/methodology"
},
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x8B1CF12e7efe6AEA59cD1124eBbe7709E3Ac6085",
"amount": "50000000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"message": "GET is not supported on /v1/door-audit; this resource is payable over x402 via POST. The price and input schema below are the ones POST /v1/door-audit will charge and expect.",
"resource": {
"url": "https://orcpin.dev/v1/door-audit",
"tags": [
"Orcpin Ledger",
"audit",
"x402",
"endpoint",
"seller"
],
"iconUrl": "https://orcpin.com/orcpin-logo.png",
"mimeType": "application/json",
"description": "Signed four-part audit of one x402 endpoint, by buying from it: the quote (what the 402 asks, and whether the seller's manifest and public catalog agree), real purchases with Orcpin's audit wallet (quoted vs signed vs settled vs chain vs delivered; replay and bad-payment behaviour), the door's inbound books from the chain (settlements, revenue, distinct and repeat payers), and unit cost against priced doors listed. Ed25519-signed and logged; facts, no verdict. No purchase settled, no charge.",
"serviceName": "Orcpin"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://orcpin.dev/v1/endpoint-reliability?url=https://example.com/v1/x",
"purchases": 3
},
"type": "http",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"cost": {
"catalog": {
"median_usd": 0.01,
"doors_priced": 980,
"share_priced_below": 0.31
},
"this_audit": {
"usd_per_delivered_response": 0.01
},
"door_price_usd": 0.01
},
"door": {
"url": "https://orcpin.dev/v1/endpoint-reliability",
"method": "GET",
"pay_to": "0x8b1c…6085",
"seller": "Orcpin",
"price_usd": 0.01
},
"spec": "door-audit",
"books": {
"usd": 4.12,
"payers": 96,
"settlements": 412,
"repeat_payers": 11,
"single_settlement_payers_at_this_price": 70
},
"quote": {
"status": 402,
"latency_ms": 210,
"price_sources": [
{
"usd": 0.01,
"source": "402"
},
{
"usd": 0.01,
"source": "public_catalog",
"agrees_with_402": true
}
],
"price_consistent": true,
"pay_to_consistent": true
},
"signed": true,
"purchase": {
"replay": {
"status": 402,
"delivered": false
},
"paid_usd": 0.03,
"receipts": {
"checked": 3,
"confirmed_on_chain": 3
},
"delivered": 3,
"purchases": 3,
"delivered_usd": 0.03,
"malformed_payment": {
"status": 400,
"delivered": false
},
"quote_matches_charged": true
},
"attention": [],
"signature": {
"alg": "ed25519",
"kid": "…",
"signature": "…128 hex…",
"public_key": "…64 hex…"
},
"schema_version": "door-audit-v1"
}
}
},
"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": [
"url"
],
"properties": {
"url": {
"type": "string",
"description": "The x402 endpoint to audit — a public http(s) URL that answers an unpaid request with a 402 challenge."
},
"body": {
"type": "object",
"description": "JSON body to send to a POST door (the request an agent would actually make). Implies method POST."
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string",
"description": "The door's verb. Default: GET, retried as POST if GET looks like the wrong verb."
},
"purchases": {
"type": "integer",
"description": "Real purchases to make, 1–5. Default 3. Their total must fit the audit's purchase budget."
}
}
},
"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",
"properties": {
"cost": {
"type": "object"
},
"door": {
"type": "object"
},
"books": {
"type": [
"object",
"null"
]
},
"quote": {
"type": "object"
},
"signed": {
"type": "boolean"
},
"purchase": {
"type": "object"
},
"attention": {
"type": "array",
"items": {
"type": "object"
}
},
"signature": {
"type": [
"object",
"null"
]
},
"disclaimer": {
"type": "string"
},
"schema_version": {
"type": "string"
}
}
}
}
}
}
}
}
},
"retry_with": {
"url": "https://orcpin.dev/v1/door-audit",
"body": {
"url": "https://orcpin.dev/v1/endpoint-reliability?url=https://example.com/v1/x",
"purchases": 3
},
"method": "POST",
"content_type": "application/json"
},
"x402Version": 2,
"method_required": "POST"
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
50USDC≈ $50 USD
on Base · exact scheme
Pay 50 USDC on Base to 0x8B1C…c6085. The signed payment is good for 5 minutes.
- Paid to
- 0x8B1C…c6085
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 50000000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x8B1CF12e7efe6AEA59cD1124eBbe7709E3Ac6085",
"amount": "50000000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://orcpin.dev/v1/endpoint-reliability?url=https://example.com/v1/x",
"purchases": 3
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"cost": {
"catalog": {
"median_usd": 0.01,
"doors_priced": 980,
"share_priced_below": 0.31
},
"this_audit": {
"usd_per_delivered_response": 0.01
},
"door_price_usd": 0.01
},
"door": {
"url": "https://orcpin.dev/v1/endpoint-reliability",
"method": "GET",
"pay_to": "0x8b1c…6085",
"seller": "Orcpin",
"price_usd": 0.01
},
"spec": "door-audit",
"books": {
"usd": 4.12,
"payers": 96,
"settlements": 412,
"repeat_payers": 11,
"single_settlement_payers_at_this_price": 70
},
"quote": {
"status": 402,
"latency_ms": 210,
"price_sources": [
{
"usd": 0.01,
"source": "402"
},
{
"usd": 0.01,
"source": "public_catalog",
"agrees_with_402": true
}
],
"price_consistent": true,
"pay_to_consistent": true
},
"signed": true,
"purchase": {
"replay": {
"status": 402,
"delivered": false
},
"paid_usd": 0.03,
"receipts": {
"checked": 3,
"confirmed_on_chain": 3
},
"delivered": 3,
"purchases": 3,
"delivered_usd": 0.03,
"malformed_payment": {
"status": 400,
"delivered": false
},
"quote_matches_charged": true
},
"attention": [],
"signature": {
"alg": "ed25519",
"kid": "…",
"signature": "…128 hex…",
"public_key": "…64 hex…"
},
"schema_version": "door-audit-v1"
}
}
},
"schema": {
"type": "object",
"$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": [
"url"
],
"properties": {
"url": {
"type": "string",
"description": "The x402 endpoint to audit — a public http(s) URL that answers an unpaid request with a 402 challenge."
},
"body": {
"type": "object",
"description": "JSON body to send to a POST door (the request an agent would actually make). Implies method POST."
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string",
"description": "The door's verb. Default: GET, retried as POST if GET looks like the wrong verb."
},
"purchases": {
"type": "integer",
"description": "Real purchases to make, 1–5. Default 3. Their total must fit the audit's purchase budget."
}
}
},
"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",
"properties": {
"cost": {
"type": "object"
},
"door": {
"type": "object"
},
"books": {
"type": [
"object",
"null"
]
},
"quote": {
"type": "object"
},
"signed": {
"type": "boolean"
},
"purchase": {
"type": "object"
},
"attention": {
"type": "array",
"items": {
"type": "object"
}
},
"signature": {
"type": [
"object",
"null"
]
},
"disclaimer": {
"type": "string"
},
"schema_version": {
"type": "string"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-16 04:55Z
- Last indexed by Roundhouse
- 2026-09-24 10:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-16 07:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
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. 9 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 Orcpin 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=Orcpin' 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://orcpin.dev/v1/door-audit, 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.