Verified Catalog Lookup
Verified catalog reliability lookup: x402 endpoints for a task at or under a price, with our own paid receipts and known-answer pass/fail. $0.02 USDC on Base per call.
TradingLiveeip155:8453Exactvia facilitator:payAI
x402ReliabilityReceiptsCatalogAgents
Settlements · 30d
15↑ 67%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$1.24
Verified settled volume
15 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x37cfCC8a29e9ff9458902B29E31E42dc7B718674The 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.
{
"asset": "USDC on Base (eip155:8453)",
"error": "Payment required: $0.02 USDC on Base per lookup via x402.",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x37cfCC8a29e9ff9458902B29E31E42dc7B718674",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://verified-catalog-lookup.withgrokbot.workers.dev/v1/lookup/paid",
"tags": [
"x402",
"reliability",
"receipts",
"catalog",
"agents"
],
"mimeType": "application/json",
"description": "Verified catalog reliability lookup: x402 endpoints for a task at or under a price, with our own paid receipts and known-answer pass/fail. $0.02 USDC on Base per call.",
"serviceName": "Verified Catalog Lookup"
},
"price_usd": "0.02",
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"n": "5",
"task": "web-search",
"max_price": "0.01"
}
},
"output": {
"type": "json",
"example": {
"query": {
"n": 5,
"task": "web-search",
"limit": 10,
"endpoint": null,
"max_price_usd": 0.01
},
"access": {
"tx": "0x...",
"tier": "paid",
"charged_usd": "0.02"
},
"matched": 1,
"results": [
{
"id": "example-search",
"stale": false,
"endpoint": "https://example.com/search",
"receipts": [
{
"tx": "0x...",
"time": "2026-10-02T18:48:42Z",
"quality": "pass",
"delivered": true,
"charged_usd": "0.01"
}
],
"pass_rate": 1,
"price_usd": "0.01"
}
],
"facts_only": [],
"payment_policy": "Payment buys query access only. It never changes results, sort order, listings, check results or known-answer outcomes: free, paid and exempt lookups run the same code on the same data and get identical results."
}
}
},
"schema": {
"type": "object",
"$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"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"queryParams": {
"type": "object",
"properties": {
"n": {
"type": "string",
"description": "paid receipts per service, 1-20 (default 5)"
},
"ref": {
"type": "string",
"description": "where you found this lookup (optional, attribution only)"
},
"task": {
"type": "string",
"description": "task name, e.g. web-search (see /v1/tasks); task or endpoint is required"
},
"limit": {
"type": "string",
"description": "services returned, 1-20 (default 10)"
},
"payer": {
"type": "string",
"description": "your 0x wallet (optional)"
},
"client": {
"type": "string",
"description": "your agent or app name (optional)"
},
"endpoint": {
"type": "string",
"description": "a service id or endpoint URL instead of a task"
},
"max_price": {
"type": "string",
"description": "maximum listed price per call, USD, e.g. 0.01"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"how_to_pay": "Retry the same request with a PAYMENT-SIGNATURE header (x402 v2; X-PAYMENT is also accepted) holding a signed USDC EIP-3009 authorization for the amount and payTo above. Bad parameters get a 400 before anything is settled.",
"x402Version": 2,
"payment_policy": "Payment buys query access only. It never changes results, sort order, listings, check results or known-answer outcomes: free, paid and exempt lookups run the same code on the same data and get identical results.",
"free_alternative": "The same lookup is free for 5 calls per client per UTC day at /v1/lookup and via the free MCP server at /mcp. Payment never changes results."
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x37cf…18674. The signed payment is good for 5 minutes.
- Paid to
- 0x37cf…18674
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x37cfCC8a29e9ff9458902B29E31E42dc7B718674",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"n": "5",
"task": "web-search",
"max_price": "0.01"
}
},
"output": {
"type": "json",
"example": {
"query": {
"n": 5,
"task": "web-search",
"limit": 10,
"endpoint": null,
"max_price_usd": 0.01
},
"access": {
"tx": "0x...",
"tier": "paid",
"charged_usd": "0.02"
},
"matched": 1,
"results": [
{
"id": "example-search",
"stale": false,
"endpoint": "https://example.com/search",
"receipts": [
{
"tx": "0x...",
"time": "2026-10-02T18:48:42Z",
"quality": "pass",
"delivered": true,
"charged_usd": "0.01"
}
],
"pass_rate": 1,
"price_usd": "0.01"
}
],
"facts_only": [],
"payment_policy": "Payment buys query access only. It never changes results, sort order, listings, check results or known-answer outcomes: free, paid and exempt lookups run the same code on the same data and get identical results."
}
}
},
"schema": {
"type": "object",
"$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"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"queryParams": {
"type": "object",
"properties": {
"n": {
"type": "string",
"description": "paid receipts per service, 1-20 (default 5)"
},
"ref": {
"type": "string",
"description": "where you found this lookup (optional, attribution only)"
},
"task": {
"type": "string",
"description": "task name, e.g. web-search (see /v1/tasks); task or endpoint is required"
},
"limit": {
"type": "string",
"description": "services returned, 1-20 (default 10)"
},
"payer": {
"type": "string",
"description": "your 0x wallet (optional)"
},
"client": {
"type": "string",
"description": "your agent or app name (optional)"
},
"endpoint": {
"type": "string",
"description": "a service id or endpoint URL instead of a task"
},
"max_price": {
"type": "string",
"description": "maximum listed price per call, USD, e.g. 0.01"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-17 02:18Z
- Last indexed by Roundhouse
- 2026-10-26 13:46Z
- Last enriched (probe, favicon, geo)
- 2026-10-04 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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Verified Catalog Lookup 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=Verified%20Catalog%20Lookup' 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://verified-catalog-lookup.withgrokbot.workers.dev/v1/lookup/paid, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.