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SatsAPI is a Bitcoin market intelligence API using the L402 protocol — pay per call in sats, no API key, no subscription, no registration.
8 endpoints: price, mempool, on-chain, derivatives, AI signals and full market summary. Costs from 2 to 200 sats (~$0.001–$0.12).
Designed for developers and autonomous AI agents. Try free: curl https://satsapi.dev/v1/demo
SatsAPI - Bitcoin intelligence APIpay per call in sats, no API key
Alejandro Pérez Vigoleft a comment
Hey PH! Builder here. The idea started from a simple question: why do APIs still use API keys when HTTP has had a 402 status code since 1991? Lightning makes 402 finally usable. The entire auth layer is ~60 lines of Express middleware. No database, no sessions, no credential rotation. The payment hash IS the proof of access. The most interesting use case is AI agents — they can acquire data...
SatsAPI - Bitcoin intelligence APIpay per call in sats, no API key