Agent Service · x402 · early usage

Web page to structured fields

by horizonpulse.dev · discovered, not yet claimed by its owner · updated 2026-10-09

30d calls3

30d payers1

MethodGET

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 page to structured fields. Use when you need specific data from a page, not its full text. GET with required url, or POST JSON {url or html, fields}. Returns JSON: title, description, canonical, language, links, images, headings, jsonLd, textSample, and with fields (map of name to CSS selector, max 20) the matched values with fieldErrors. Caps: 200KB HTML, 8s; private targets blocked. If no requested field matches it returns 422 and is not charged. Errors are not charged.

Tags: web · extract · structured-data · css-selectors · json-ld · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-09

Input example from Bazaar metadata

{
  "url": "https://horizonpulse.dev"
}

Output example

{
  "description": "Pay-per-call APIs for AI agents via x402 on Base: web fetch, HTTP proxy, page extract, and crypto market data.",
  "elapsedMs": 120,
  "fieldErrors": {},
  "fields": {
    "heading": "Pay-per-call APIsbuilt for agents.",
    "links": [
      "https://horizonpulse.dev/",
      "https://horizonpulse.dev/#catalog",
      "https://horizonpulse.dev/#how"
    ]
  },
  "finalUrl": "https://horizonpulse.dev/",
  "headings": [
    {
      "level": 1,
      "text": "Pay-per-call APIs built for agents."
    },
    {
      "level": 2,
      "text": "Thirteen routes. One protocol."
    }
  ],
  "language": "en",
  "links": [
    {
      "href": "https://horizonpulse.dev/",
      "text": "Horizon Pulse"
    },
    {
      "href": "https://horizonpulse.dev/#catalog",
      "text": "Catalog"
    }
  ],
  "matchedFields": 2,
  "ok": true,
  "requestedFields": 2,
  "textSample": "# Horizon Pulse\n\nLive on Base · x402 v2\n# Pay-per-call APIs\n built for agents.\n\n13 routes for market data, the web and d…",
  "title": "Horizon Pulse",
  "url": "https://horizonpulse.dev/"
}

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/33236.json for the price and payment options.
Pay. Call GET https://horizonpulse.dev/api/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, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.015 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana
Demand: 3 calls · 1 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.015	0x5b32c973596078a967562ca652761404f19be0e9	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.015	BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x5b32c973596078a967562ca652761404f19be0e9",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "15000",
    "amountUsd": 0.015,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "15000",
    "amountUsd": 0.015,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "description": "Horizon Pulse structured HTML extract result. The example is a trimmed real response recorded from GET /api/demo/extract at 2026-10-01T14:36Z UTC; live values differ on every call.",
      "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://horizonpulse.dev/api/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://horizonpulse.dev/api/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://horizonpulse.dev/api/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: horizonpulse.dev
Endpoint: https://horizonpulse.dev/api/extract
Machine-readable: /resources/33236.json