1gateway

1gateway X402 API

The X402 API from 1gateway — 4 operation(s) for x402.

GitHub OpenAPI

Operations 4

GET /v1/x402/verify x402 payment verify: did this transaction really pay USDC to this address? #
GET /v1/x402/recommend x402 API finder: ranked paid endpoints for a task, with demand and quality flags #
GET /v1/x402/lint x402 seller linter: grade an x402 endpoint's 402 quote, Bazaar metadata and… #
GET /v1/x402/preflight x402 preflight: ALLOW / WARN / DENY before an agent pays an x402 endpoint #

Specifications

⚙
OpenAPI
https://artifacts.apis.io/1gateway-dev/openapi/1gateway-dev-x402-api-openapi.yml

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OpenAPI Specification

1gateway-dev-x402-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: 1gateway X402 API
  version: 0.1.1
  description: '1gateway lets AI agents buy the data and APIs they need, one call at a time: no signup, no API key, paid per request with USDC on Base or Solana via x402. Coverage: company and compliance checks (sanctions, KYB, SEC filings, Korean companies), Korean real estate, trade and macro data, onchain and market data, and agent utilities such as document-to-Markdown. Every response names its source. Failed calls are never charged.'
  x-guidance: 'Use this API when an agent needs data as English JSON with pay-per-call access and no signup. Common tasks: Korea apartment sale transactions and district price summaries, Korean public holidays, Korea company KYB (company resolve, profile, NTS business status, DART filings, supplier check), Korean HWP/HWPX to Markdown, web page to Markdown (web read), and document extract (PDF, DOCX, HWP/HWPX or web page to structured JSON). Current coverage is South Korea: apartment sale prices (MOLIT), exports/imports and 10-day export flash (Korea Customs), Bank of Korea statistics (ECOS), weather forecast by lat/lon (KMA), holidays (KASI); more APIs and countries are coming. Base onchain reads: token risk, wallet balances, token info, transaction status. Also: document → Markdown conversion for web pages, PDF, DOCX and Korean HWP/HWPX (price by detected type, decided before payment). Every /v1 endpoint is paid: call it, receive HTTP 402 with PAYMENT-REQUIRED, pay with an x402 client (USDC on Base or Solana, same price) and retry. No charge on failure: settlement happens only on 2xx; 4xx/5xx are never charged. Agent guide: https://1gateway.dev/agents.md. Status: https://1gateway.dev/status. MCP (Streamable HTTP) is available at https://1gateway.dev/mcp: initialize and tools/list are free, tools/call is paid via x402 _meta.'
  contact:
    email: contact@1gateway.dev
servers:
- url: https://1gateway.dev
tags:


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# Full source: https://artifacts.apis.io/1gateway-dev/openapi/1gateway-dev-x402-api-openapi.yml