L402 API Registry
A curated directory of APIs powered by Lightning Network micropayments.
No API keys. No subscriptions. Just pay per request.
Our APIs
Fortune API
Get a random fortune cookie message
https://lightningfaucet.com/api/l402/fortune
curl -s https://lightningfaucet.com/api/l402/fortune
Joke API
Get a random joke
https://lightningfaucet.com/api/l402/joke
curl -s https://lightningfaucet.com/api/l402/joke
Quote API
Get an inspirational quote
https://lightningfaucet.com/api/l402/quote
curl -s https://lightningfaucet.com/api/l402/quote
These are a few of our 25 L402 endpoints — Bitcoin data, AI utilities, content generation, and more.
Community Directory
https://stock.l402.org/ticker/{SYMBOL}
Real-time stock data (price, P/E, revenue)
Auth: Bearer {user_id} from /signup
Requires pre-registration. Not a pure L402 flow.
Maximum Sats AI
https://maximumsats.com/api/dvm
AI text generation endpoint. 1 free query per IP per 24 hours, then 21 sats via Lightning (L402).
Auth: None
Maximum Sats AI Image Generator
https://maximumsats.com/api/imagegen
AI image generation powered by FLUX.1 Schnell (12B). Send a text prompt, pay 100 sats via Lightning, get a PNG image. No API keys required.
Auth: L402 (none required - pay per request)
Nostr Web of Trust Scoring API
https://wot.klabo.world/score?pubkey={hex}
Nostr trust scoring API backed by a 51k+ pubkey graph. Query /score for a 0-100 trust score and use /pricing for the full endpoint matrix and costs.
Auth: L402 (pay-per-request, no API key)
List Your L402 API
Have an L402-enabled API? Get discovered by AI agents and developers worldwide.
What is L402?
L402 (formerly LSAT) is a protocol that enables APIs to charge per-request using Bitcoin's Lightning Network. When you call an L402-protected endpoint:
- 1 Server returns
HTTP 402 Payment Requiredwith a Lightning invoice - 2 Client pays the invoice (~milliseconds)
- 3 Client retries request with proof of payment
- 4 Server returns the requested data
Our AI Agent Wallet MCP handles this automatically — just call pay_l402_api().