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The Agent Economy

Infrastructure directory

Listing

L402

Live

L402 is a live listing under Payment rails. HTTP 402 flow that pairs a macaroon with a Lightning invoice. The client pays, then presents the preimage so the server can check payment without a lookup. The listing is open source.

Last verified 2026-10-16

Sources

Status
live
Open source
Yes
Tags
http-402, lightning, macaroons
Last verified
2026-10-16

Adoption: claimed vs measured

Claimed and measured adoption figures
SideMetricFigureChecked
Vendor claimNone publishedNone published2026-10-19
Independent measurementCurated L402 API registry size4 providers, 36 endpoints12026-10-19
  1. Published by Lightning Faucet. Source date 2026-04-01. Checked 2026-10-19. docs: add real L402 API examples from LightningFaucet registry

Figures are quoted from the linked sources and dated. They measure different things and are shown side by side without a conclusion.

How these figures are chosen · Checked 2026-10-19

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Questions

What is L402?
HTTP 402 flow that pairs a macaroon with a Lightning invoice. The client pays, then presents the preimage so the server can check payment without a lookup.
What is the status of L402?
L402 is live in Payment rails.
Is L402 open source?
Yes. The repository URL is one of the links on the listing.
When was L402 last verified?
Last verified 2026-10-16.

Sources