Bounty Engineer · Agent-native paid API · No subscription

Track what changed on the public web

Feed autonomous research agents source changes without rereading the same pages blindly. Compare up to two publicly accessible HTML pages against a private seven-day baseline, with exact text hashes, source URLs and concise excerpts. $0.02 USDC on Base or Solana per successful buyer-authorized x402 request.

Machine product finder · OpenAPI contract · Real, free fetched-source proof · Mock response schema

Agent call

POST https://bounty-engineer-x402-api.onrender.com/v1/agent-evidence-loop
Content-Type: application/json

{"namespace_key":"YOUR_OWN_RANDOM_SECRET_AT_LEAST_24_CHARACTERS","watch_id":"research-notes-v1","sources":["https://example.com/"]}

Make a first authorized call to establish a baseline; invoke the same watch again after at least 10 minutes to detect changes. Each watch keeps snapshots for seven days. Checks are not scheduled or charged automatically: your agent must choose when to call and authorize the payment within its spending budget.

No paid search engine, no crawling paywalls, and no login-only sites. The endpoint proves the origin of the extracted text and a text change, not whether a webpage's claims are true. Full HTML is not stored as a watch snapshot.