x402.cambrian.org
Cambrian is the financial intelligence layer for the age of digital assets. Fast, comprehensive, and verifiable onchain data for agents, institutions, and protocols.
InfraLiveeip155:8453Exactvia facilitator:payAI
Settlements · 30d
28↑ 433%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$16.65
Verified settled volume
334 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x4c3b0b1cab290300bd5a36ad5f33a607acbd7ac3The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4c3b0b1cab290300bd5a36ad5f33a607acbd7ac3",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
],
"resource": {
"url": "https://x402.cambrian.org/x402/api/v1/evm/aero/v2/pools",
"mimeType": "application/json",
"description": "V2 - List Pools"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain_id": 8453
}
},
"output": {
"type": "array"
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "integer",
"default": 100,
"maximum": 10000,
"minimum": 1,
"description": "Limit the number of results."
},
"offset": {
"type": "integer",
"default": 0,
"maximum": 100000000,
"minimum": 0,
"description": "Offset the results, allows you to skip a number of rows before starting to return rows."
},
"chain_id": {
"enum": [
8453
],
"type": "integer",
"default": 8453,
"example": 8453,
"description": "EVM chain ID."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "array",
"items": {
"type": "object",
"items": {},
"properties": {
"data": {
"type": "array",
"items": {
"type": "array",
"items": {
"oneOf": [
{
"type": "string"
},
{
"type": "number"
},
{
"type": "boolean"
},
{
"type": "array"
},
{
"type": "integer"
}
]
}
},
"description": "Data rows"
},
"rows": {
"type": "integer",
"description": "Number of rows returned"
},
"columns": {
"type": "array",
"items": {
"type": "object",
"required": [
"name",
"type"
],
"properties": {
"name": {
"type": "string",
"description": "Name of the column"
},
"type": {
"type": "string",
"description": "Data type of the column"
}
}
},
"description": "Column metadata"
}
},
"description": "Block of tabular data"
},
"description": "Array of Table objects"
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.05USDC≈ $0.05 USD
on Base · exact scheme
Pay 0.05 USDC on Base to 0x4c3b…d7ac3. The signed payment is good for 10 minutes.
- Paid to
- 0x4c3b…d7ac3
- USD Coin contract
- 0x8335…02913
- Payment window
- 10 minutes
- As published
- 50000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4c3b0b1cab290300bd5a36ad5f33a607acbd7ac3",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain_id": "8453"
}
},
"output": {
"type": "array"
}
},
"schema": {
"type": "object",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"properties": {
"queryParams": {
"type": "object",
"additionalProperties": true
}
}
},
"output": {
"type": "object",
"properties": {
"example": {
"type": "array"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-19 16:01Z
- Last indexed by Roundhouse
- 2026-09-24 11:45Z
- Last enriched (probe, favicon, geo)
- 2026-09-19 17:15Z
- x402 version
- 2
- Max timeout
- 600s
- 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 x402.cambrian.org 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=x402.cambrian.org' 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://x402.cambrian.org/x402/api/v1/evm/aero/v2/pools, 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.