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L402 Protocol

Technical coverage of the L402 protocol — how Lightning-gated HTTP APIs work, the payment-as-authorization model, and what L402 means for building paywall-free but paid services.

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Lightning Labs Agent Toolkit: L402 for Autonomous APIs

Lightning Labs’ agent toolkit turns L402 into deployable agent infrastructure, but the wider 402-payments market is still splitting across incompatible stacks.

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Dark technical illustration of an AI agent using Lightning-based L402 payment authorization to access paid APIs, with a 402 challenge, payment receipt flow, and parallel machine-payment standards shown as separate lanes.

Web3 Builder7 min read

Lightning Labs Agent Toolkit: L402 for Autonomous APIs

Lightning Labs’ agent toolkit turns L402 into deployable agent infrastructure, but the wider 402-payments market is still splitting across incompatible stacks.

Marcus Bishop

Mar 28, 2026