Blockchain Data · x402
CANTU Buyer Demand Search — Paid machine-readable search for current buyer demand and p…
CANTU Buyer Demand Search — Paid machine-readable search for current buyer demand and procurement opportunities; also verifies a specific official notice ID or URL.
by cantu-radar-flow.base44.app · discovered, not yet claimed by its owner · updated 2026-09-03
Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.
What it does
CANTU Buyer Demand Search — Paid machine-readable search for current buyer demand and procurement opportunities; also verifies a specific official notice ID or URL.
Tags: bazaar · builder-code · eip2612GasSponsoring · erc20ApprovalGasSponsoring
Use with an agent
- Discover. Agents find this listing with
GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP toolsearch_resources, or/discovery/resources. - Inspect. Fetch
/resources/13320.jsonfor the price and payment options. - Pay. Call
GET https://cantu-radar-flow.base44.app/functions/cantuVerifyX402. The provider answers402with its payment requirements. An x402 client signs one of the options below and retries withPAYMENT-SIGNATURE. - Execute. The provider returns
200with the data. Agent Bazaar is not in the request path and never sees your payment.
For humans
You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.
Pricing & payment
- Price
- $0.1 / request
- Protocol
- x402 v2
- Auth
- No account or API key. Pay per request.
- Networks
- Base
- Calls (30d)
- 2 · 1 unique payers (third-party data from the public x402 Bazaar)
x402 payment requirements
| Scheme | Network | Asset | Amount | Pay to | Timeout |
|---|---|---|---|---|---|
| exact | Base eip155:8453 | USDC | $0.1 | 0x43988aa17c017677a1508b5232aad038e482e638 | 300s |
accepts[] (raw JSON)
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x43988aa17c017677a1508b5232aad038e482e638",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "100000",
"amountUsd": 0.1,
"maxTimeoutSeconds": 300
}
]Schemas
Output schema (JSON Schema)
{
"bazaar": {
"info": {
"input": {
"body": {
"query": "industrial fasteners"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"query": "industrial fasteners",
"result_count": 1,
"results": [
{
"actionability_explanation": "Evidence-based score.",
"actionability_score": 0,
"buyer": "Official buyer",
"confidence": 0,
"contact": null,
"deadline": null,
"description": null,
"evidence": "SAM.gov lists an active opportunity.",
"naics": null,
"nsn_or_part_number": null,
"psc": null,
"quantity": null,
"requirement": "Industrial fasteners",
"restrictions": null,
"solicitation_number": "EXAMPLE",
"source_url": "https://sam.gov/"
}
],
"searched_at": "2026-09-03T00:00:00.000Z",
"service": "CANTU Buyer Demand Search"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"anyOf": [
{
"required": [
"query"
]
},
{
"required": [
"notice_id"
]
},
{
"required": [
"url"
]
}
],
"properties": {
"notice_id": {
"description": "Official procurement notice or solicitation identifier",
"type": "string"
},
"query": {
"description": "Topic to search in current SAM.gov opportunity titles",
"maxLength": 120,
"minLength": 2,
"type": "string"
},
"url": {
"description": "Public HTTPS URL for an official procurement notice",
"format": "uri",
"type": "string"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"query": {
"type": "string"
},
"result_count": {
"type": "integer"
},
"results": {
"items": {
"properties": {
"actionability_explanation": {
"type": "string"
},
"actionability_score": {
"type": "integer"
},
"buyer": {
"type": [
"string",
"null"
]
},
"confidence": {
"type": "integer"
},
"contact": {
"type": [
"string",
"null"
]
},
"deadline": {
"type": [
"string",
"null"
]
},
"description": {
"type": [
"string",
"null"
]
},
"evidence": {
"type": [
"string",
"null"
]
},
"naics": {
"type": [
"string",
"null"
]
},
"nsn_or_part_number": {
"type": [
"string",
"null"
]
},
"psc": {
"type": [
"string",
"null"
]
},
"quantity": {
"type": [
"string",
"null"
]
},
"requirement": {
"type": "string"
},
"restrictions": {
"type": [
"string",
"null"
]
},
"solicitation_number": {
"type": [
"string",
"null"
]
},
"source_url": {
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"maxItems": 10,
"type": "array"
},
"searched_at": {
"format": "date-time",
"type": "string"
},
"service": {
"type": "string"
}
},
"required": [
"service",
"query",
"result_count",
"searched_at",
"results"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"s": [
"cdp_sdk_server"
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"a": {
"description": "App builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"s": {
"description": "Service builder codes",
"items": {
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"maxItems": 11,
"type": "array"
},
"w": {
"description": "Wallet builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
}
},
"type": "object"
}
},
"eip2612GasSponsoring": {},
"erc20ApprovalGasSponsoring": {}
}Example shape — generated from the schema, not a captured live response
nullExamples
curl
curl "https://cantu-radar-flow.base44.app/functions/cantuVerifyX402"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paidJavaScript
const res = await fetch("https://cantu-radar-flow.base44.app/functions/cantuVerifyX402");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://cantu-radar-flow.base44.app/functions/cantuVerifyX402")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerDetails
- Provider
- cantu-radar-flow.base44.app
- Endpoint
- https://cantu-radar-flow.base44.app/functions/cantuVerifyX402
- Machine-readable
/resources/13320.json