x402 API list: live, keyless endpoints you can call now
Looking for x402 APIs to actually call? 2s is a directory of hundreds of live, keyless, pay-per-call endpoints that return real data — not demos. Every one uses the same x402 flow.
Browse the full catalog
The complete, always-current list lives on the directory pages. Each endpoint has its own page with parameters, response schema, pricing, and copy-paste samples:
Human directory: the /discover catalog, grouped by category.
Machine directory: /api/directory (JSON) and /openapi.json (OpenAPI 3.1).
LLM manifest: /llms.txt — a plain-text summary built for crawlers and agents.
A taste of what is available
The catalog spans public records, finance, crypto and web3, security and CVEs, legal, medical, weather, geo, and B2B/EDI. A few examples:
weather — US National Weather Service forecasts by ZIP or coordinate.
patents — USPTO patent search.
law — OFAC sanctions screening and US trademark search.
finance — SEC EDGAR filings and 13F institutional holdings.
security — CVE lookup across NVD, CISA KEV, and EPSS.
geocode — address ↔ coordinate, backed by OpenStreetMap.
Call one right now
No signup required — try any endpoint free with a trial call:
cURL — free trialbash
# Free trial call — real data, no payment, no signup (1/endpoint/hour):
curl "https://2s.io/api/weather/zip?zip=94103&trial=1"
The 2s directory at /discover (human) and /api/directory (JSON) lists hundreds of live x402 endpoints, each with its own page, schema, and code samples. The catalog grows continuously.
Are these x402 APIs really keyless?
Yes. There is no signup and no API key — payment via x402 replaces authentication. Fund a wallet with USDC and call any endpoint.
What kinds of data can I get?
Public records, finance and SEC data, crypto/web3, security and CVEs, legal, medical, weather, geocoding, and B2B/EDI — all returning real, authoritative data.
Is there a machine-readable index for agents?
Yes: /api/directory and /openapi.json for structured discovery, plus /llms.txt as a plain-text manifest and /.well-known/x402 as the service descriptor.
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