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developer-tools // Protocols
Charge for any HTTP API with Lightning: the L402 protocol and Aperture, Lightning Labs' reverse proxy that enforces it.
Build: Paid APIs
overview
L402 revives HTTP 402 Payment Required. A client calls your API, receives a Lightning invoice plus a macaroon, pays, and retries with proof of payment — no accounts or API keys. Aperture sits in front of your existing service and handles the invoices, macaroons, and pricing, which makes it a natural fit for pay-per-call APIs and AI agents that pay for data.
why // builders
build // with this tool
Move from discovery into Pull’s Learn → Build → Contribute → Prove loop.
projects // suggested
Put Aperture in front of a small API and price each endpoint in sats.
Explore projectsBuild a script or agent that pays L402 invoices to fetch data.
Explore projectsresources
discussion
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