Market Data · x402 · early usage

Web extraction for AI agents: URL to clean Markdown + metadata, automatic JS rendering,…

Web extraction for AI agents: URL to clean Markdown + metadata, automatic JS rendering, robots.txt respected. No API key.

by mart402.com · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls13

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

Web extraction for AI agents: URL to clean Markdown + metadata, automatic JS rendering, robots.txt respected. No API key.

Tags: bazaar · offer-receipt

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "mode": "auto",
  "url": "https://mart402.com/samples/assets/article.html"
}

Output example

{
  "author": "Mart",
  "cache_hit": false,
  "date": "2026-09-26",
  "extract_ms": 24,
  "fetch_ms": 242,
  "final_url": "https://mart402.com/samples/assets/article.html",
  "lang": null,
  "markdown": "# How an AI agent pays for an API call with x402\n\nThis page is a sample asset. It exists so that the example requests in our documentation work exactly as written: an agent that copies the example and pays for it gets real, useful content back instead of an error.\n\n## The four steps\n\nFirst, the agent sends an ordinary HTTP request to a paid endpoint without any payment. The server answers with HTTP 402 Payment Required and a machine-readable body that states the price, the asset (USDC), the network (Base) and the recipient address. Nothing has been charged at this point, so inspecting the term\n... (truncated in sample; full text returned on paid calls)",
  "method": "fast",
  "note": "SAMPLE RESPONSE recorded from a real run of the production engine on the self-hosted sample asset (deterministic product: same input gives this output). Served free at /samples/{product}. No payment was taken.",
  "ok": true,
  "reason": "",
  "receipt_id": "rcpt_... (issued on every paid call; re-fetch free at GET /v1/receipts/{id})",
  "sample": true,
  "sample_input": {
    "mode": "fast",
    "url": "https://mart402.com/samples/assets/article.html"
  },
  "status": 200,
  "text_len": 1654,
  "title": "How an AI agent pays for an API call with x402",
  "url": "https://mart402.com/samples/assets/article.html"
}

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/31242.json for the price and payment options.
Pay. Call GET https://mart402.com/v1/extract. 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: $0.0025 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 13 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	$0.0025	0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2500",
    "amountUsd": 0.0025,
    "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://mart402.com/v1/extract"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://mart402.com/v1/extract");
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://mart402.com/v1/extract")
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: mart402.com
Endpoint: https://mart402.com/v1/extract
Machine-readable: /resources/31242.json