Horizon Pulse

Horizon Pulse Web and documents API

Read, call and render the public web.

GitHub OpenAPI

Operations 7

GET /api/fetch Any public URL as clean text or markdown #
GET /api/http Universal HTTP proxy: your method, headers and body #
POST /api/http Universal HTTP proxy: your method, headers and body #
GET /api/extract Page to structured fields, or your own CSS selectors #
POST /api/extract Page to structured fields, or your own CSS selectors #
GET /api/search Web search with the top pages as clean text and sources #
GET /api/pdf PDF URL to text per page plus metadata #

Specifications

⚙
OpenAPI
https://artifacts.apis.io/horizonpulse-dev/openapi/horizonpulse-dev-web-and-documents-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://artifacts.apis.io/horizonpulse-dev/json-schema/horizonpulse-dev-market-search-response-schema.json
📊
JSONSchema
https://artifacts.apis.io/horizonpulse-dev/json-schema/horizonpulse-dev-x402-check-deep-response-schema.json
📊
JSONSchema
https://artifacts.apis.io/horizonpulse-dev/json-schema/horizonpulse-dev-market-quote-response-schema.json
📊
JSONSchema
https://artifacts.apis.io/horizonpulse-dev/json-schema/horizonpulse-dev-bazaar-check-response-schema.json
📊
JSONSchema
https://artifacts.apis.io/horizonpulse-dev/json-schema/horizonpulse-dev-balance-response-schema.json
📊
JSONSchema
https://artifacts.apis.io/horizonpulse-dev/json-schema/horizonpulse-dev-grocery-normalize-response-schema.json

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/horizonpulse-dev:horizonpulse-dev-web-and-documents-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

horizonpulse-dev-web-and-documents-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Horizon Pulse Web and documents API
  version: 1.1.0
  termsOfService: https://horizonpulse.dev/terms/buyer
  summary: Pay-per-call APIs for AI agents, settled in USDC on Base, Solana or Polygon, or RLUSD on the XRP Ledger, with x402.
  description: 'Pay-per-call APIs for AI agents, paid in USDC on Base, Solana or Polygon, or RLUSD on the XRP Ledger, with x402: web search, page fetch and extract, PDF to text, an HTTP proxy, and crypto market data. No signup or API key.


    On Base, you only pay for a successful response; errors are not charged except where an operation says so (for /api/tx-status, a not_found status is a charged answer; poll again after pollAgainSeconds). These no-charge statements are made for USDC on Base. On USDC on Solana, and RLUSD on the XRP Ledger, a refused or failed request may still be charged. charged: false means Horizon Pulse did not settle the payment; on USDC on Solana, and RLUSD on the XRP Ledger, this is not a guarantee that no funds moved. Every paid operation carries `x-payment-info` with the exact price, asset, network and payTo of its Base entry; these match the 402 challenge and https://horizonpulse.dev/.well-known/x402. The 402 challenge also offers the same price in USDC on Solana mainnet (`exact`, network solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, USDC mint EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v, payTo BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz, PayAI facilitator https://facilitator.payai.network), and in native USDC on Polygon PoS mainnet (`exact`, network eip155:137, USDC 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359, payTo 0x5b32c973596078a967562ca652761404f19be0e9, facilitator: Coinbase CDP), and in RLUSD on the XRP Ledger mainnet (`exact`, network xrpl:0, currency RLUSD = 524C555344000000000000000000000000000000, issuer rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De, payTo r3FbirL83RAB2CwnUdxE5pCohMkuo6LQcf, verified on the validated ledger). Recorded example responses (fixed input, dated, informational; not paid operations): GET /api/demo/{route}.


    Agent integration: step-by-step skill at https://horizonpulse.dev/skill.md; guide with MCP setup at https://horizonpulse.dev/agents (hosted MCP at https://horizonpulse.dev/mcp for x402-aware clients, plus a local stdio MCP server in the repo''s mcp/ folder that pays from your own wallet with spend caps).


    Services for API owners (web pages, not API operations; not paid via x402): Bazaar listing fix at https://horizonpulse.dev/listing-fix; agent promotion at https://horizonpulse.dev/agent-promotion.'
  contact:
    name: Horizon Pulse
    email: horizonpulse.co@proton.me
    url: https://horizonpulse.dev
  x-guidance: 'Read PAYMENT-REQUIRED (base64 JSON). Pay exact USDC on Base (CDP), Solana (PayAI feePayer), Polygon, or RLUSD on XRPL at the listed payTo. Unpaid samples: /api/demo/{route}. Skill: /skill.md. Hosted MCP: /mcp (Base USDC only).'
servers:
- url: https://horizonpulse.dev
  description: Production
security:
- x402: []
tags:


# --- truncated at 32 KB (44 KB total) ---
# Full source: https://artifacts.apis.io/horizonpulse-dev/openapi/horizonpulse-dev-web-and-documents-api-openapi.yml