Market Data · x402 · early usage

File what you want to buy from an agent-facing API and cannot buy today

by agentdata-api.sander-van-aard.workers.dev · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls5

30d payers3

MethodPOST

Outputjson

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

File what you want to buy from an agent-facing API and cannot buy today. Optional kind is typically one of coin, country, vies_country, monitor_host, sms_service — free-form values possible. The $0.01 fee is there to keep intents honest, not to sell you anything: it is not a purchase of the capability and no promise that it gets built. Optionally add the price per call you would pay and your expected monthly volume. Free alternative: POST /agent/request.

Tags: bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-08

Input example from Bazaar metadata

{
  "expected_calls_per_month": 2000,
  "kind": "country",
  "max_price_usd": 0.05,
  "value": "PT",
  "want": "Portuguese company register lookup by NIPC"
}

Output example

{
  "checked_at": "2026-07-29T08:00:00.000Z",
  "intent_id": "want_a1b2c3d4e5f6",
  "note": "Recorded as a paid intent. The $0.01 fee exists to keep intents honest — it is not a purchase of the capability, not a subscription, and no promise that this gets built. Your intent is counted in the paid /x402/demand-report, aggregated and anonymised: your wallet is stored only as a keyed hash and the text of your intent is never resold verbatim. Coverage identifiers (kind/value) are what make an intent countable, so send them if you can.",
  "query": {
    "expected_calls_per_month": 2000,
    "kind": "country",
    "max_price_usd": 0.05,
    "value": "PT",
    "want": "Portuguese company register lookup by NIPC"
  },
  "recorded": true
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/40078.json for the price and payment options.
Pay. Call GET https://agentdata-api.sander-van-aard.workers.dev/agent/want. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with 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: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 5 calls · 3 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0xb0ae6a9bd7a573ddda58db6c28622417e8ca2099	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xb0ae6a9bd7a573ddda58db6c28622417e8ca2099",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {},
  "type": "string"
}

Examples

curl

curl "https://agentdata-api.sander-van-aard.workers.dev/agent/want"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://agentdata-api.sander-van-aard.workers.dev/agent/want");
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://agentdata-api.sander-van-aard.workers.dev/agent/want")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: agentdata-api.sander-van-aard.workers.dev
Endpoint: https://agentdata-api.sander-van-aard.workers.dev/agent/want
Machine-readable: /resources/40078.json