Lightning Labs Launches L402 Bitcoin Payment Website for AI Agents

ChainCatcher report, according to The Defiant, Lightning Labs—the company behind the Lightning Network’s development tools—launched a dedicated website for the L402 protocol on Wednesday, positioning it as a channel for AI agents to make payments in Bitcoin. The company stated that with L402, agents can pay in Bitcoin and natively authenticate without requiring accounts, intermediaries, or human intervention, describing L402 as the protocol for machine-to-machine commerce on Lightning. According to its disclosure, what was newly added is the website, not the protocol itself. L402, or the Lightning HTTP 402 protocol, has already existed within Lightning Labs’ technology stack; its standard implementation, Aperture, is currently used by the non-custodial exchange service Lightning Loop. The mechanism repurposes the HTTP 402 status code: when a client requests a restricted endpoint, the server responds with a 402 status and an authentication header containing a token and a Lightning invoice. After the client makes payment, it uses the token and payment preimage to access the endpoint; the server can verify the payment without querying a payment database.