# ProofFetch

Evidence-bearing public web extraction for autonomous agents.

- Connect your agent: https://prooffetch.steellantern.com/connect
- Free preflight: POST https://prooffetch.steellantern.com/v1/preflight (or GET https://prooffetch.steellantern.com/v1/preflight?url=https://example.com/)
- Paid cited evidence: POST https://prooffetch.steellantern.com/v1/evidence ($0.01 a page: a 500-page card pack for $5.00, or $0.50 per Stripe MPP card/SPT payment, which returns the page plus an API key (callBundle.apiKey) for 49 more)
- OpenAPI discovery: https://prooffetch.steellantern.com/openapi.json
- MCP: POST https://prooffetch.steellantern.com/mcp
- A2A card: https://prooffetch.steellantern.com/.well-known/agent-card.json
- Support case intake: POST https://prooffetch.steellantern.com/v1/support (non-sensitive technical/payment issues only)
- Status: available

Free request JSON: {"url":"https://example.com","maxChars":30000}
Paid request JSON: {"url":"https://example.com","maxChars":30000,"idempotencyKey":"<22+ random URL-safe characters>"}

The free response contains metadata, hashes, risk indicators and a text preview of about the first 1,000 characters (preview.complete is true when that is the whole page). Paid output adds every paragraph, content text, and a payment receipt. A high-entropy idempotency key enables recovery without a second charge. Support cases return a one-time access token; retain it and do not send secrets or personal contact details. Public resources only; no cookies, credentials, browser actions, or private networks. Risk indicators are warnings, not a safety guarantee. Every error response has a stable error code plus a plain-language message saying what to fix.

Try it free: POST https://prooffetch.steellantern.com/v1/keys/free (no card, no body) returns a free key holding 25 full extractions, shown once. One free key per network per month; a limited number are issued each day. It is used exactly like a paid key, a credit is spent only when an extraction succeeds, and when it runs out the 402 free_credits_exhausted answer links to the paid pack.

No MPP wallet? Buy 500 extractions for $5.00 ($0.01 a page) with a card at https://prooffetch.steellantern.com/#buy. Send the key as Authorization: Bearer <key> to POST https://prooffetch.steellantern.com/v1/evidence, or as an MCP request header to unlock the proof_fetch_evidence tool. Balance: GET https://prooffetch.steellantern.com/v1/credits.