> For the complete documentation index, see [llms.txt](https://docs.lightning.engineering/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lightning.engineering/the-lightning-network/l402/implementations-and-links.md).
# Implementations and Links
Not listed? [Fill out this form!](https://docs.google.com/forms/d/e/1FAIpQLSdT6kP3oUzd6xWytkDcflU9byHcp8nP9IyYntm_6wa9Cw6qqg/viewform)
## L402 implementations and libraries
* [Aperture: A gRPC/HTTP authentication reverse proxy using L402](https://github.com/lightninglabs/aperture)
* [lsat-js: A utility library for working with L402](https://github.com/Tierion/lsat-js)
* [boltwall: Nodejs middleware-based authentication using L402](https://github.com/tierion/boltwall)
* [now-boltwall: The Boltwall deployment toolkit](https://github.com/tierion/now-boltwall)
* [Aperture Dynamic Pricing Demo](https://github.com/ellemouton/aperture-demo)
## Projects using L402
* [Satring](https://satring.com/), a repository for L402 endpoints
* [WoT Scoring](https://wot.klabo.world/), an L402-gated way to discover Nostr networks of trust
* [Lightning Pool](/lightning-network-tools/pool.md)
* [Lightning Loop](/lightning-network-tools/loop.md)
* [L402 Playground](https://lsat-playground.bucko.now.sh/)
## Further reading
* [Tierion: Pseudonymous Authentication using Bitcoin Lightning Payments](https://medium.com/tierion/lsats-pseudonymous-authentication-using-bitcoin-lightning-payments-459e209b4b36)
* [Macaroons: Cookies with Contextual Caveats](https://research.google/pubs/pub41892/)\
the 2014 paper published on Google Scholar.
* [HTTP/1.1 RFC, Section 6.5.2: 402 Payment Required](https://tools.ietf.org/html/rfc7231#section-6.5.2)
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