L402 (Lightning HTTP 402)

The neutral micropayment router for autonomous agents. A single HTTP client that intercepts '402 Payment Required', routes across x402, L402, and MPP, persists credentials as recoverable assets, enforces per-envelope budgets, and emits a structured trace.

540 security tests for AI agent systems — MCP, A2A, x402/L402, decision governance, benchmark integrity, skill supply chain. AIUC-1 pre-cert, NIST AI 800-2 aligned, MCP tool-poisoning reproduction. v4.9.1

A neutral landscape analysis of AI agent payment protocols (x402, MPP, L402, Google AP2, Visa TAP + ICC, Mastercard Agent Pay, Amex ACE, Google/Shopify UCP, OpenAI ACP, and others). Maintained by Genesis Software Group, Copenhagen. Updated April 2026. CC BY 4.0.

MCP Server for Lightning Faucet - Give your AI agent a Bitcoin wallet

Give your AI agents a fetch() that pays. Multi-protocol, multi-chain, open source.

MCP server for 402 Index: discover 15,000+ paid API endpoints across L402, x402, and MPP

Sovereign oracle protocol — cryptographically signed data over Lightning sats (L402) and USDC on Base (x402). 11 feeds, 9 exchanges, DLC attestations, MCP server. No API keys, no accounts, no trust.

Any API becomes a Lightning toll booth in one line. L402 middleware for Express, Hono, Deno, Bun, and Workers.

Enable AI agents to access paid APIs across multiple protocols and chains with automated payment and data retrieval in one call.

Announce HTTP 402 services on Nostr for decentralised discovery. Kind 31402 parameterised replaceable events.

Buyer-side HTTP 402 runtime and surface inspector for autonomous agents: inspect, pay, recover, verify, and trace across L402, x402, and MPP.

402 client MCP - AI agents discover, pay for, and consume L402 + x402 APIs

Lightning-paid AI inference - monetise any OpenAI-compatible endpoint in 30 seconds

JavaScript client library for L402 (HTTP 402 Payment Required with Lightning Network) - pay-per-request APIs

Go client library for L402 (HTTP 402 Payment Required with Lightning Network) - pay-per-request APIs

This contradiction card documents Coinbase’s orchestration inflation via HTTP status code rebranding, wallet-based identity simulation, and semantic laundering. It proves that X402, L402, MCP, and EVMAUTH are post-filing simulation artifacts—not prior art.

Universal payment SDK for AI agents, MCP servers, and automated pipelines. Bridges L402 (Lightning) and x402 (USDC) transparently.

MCP server for 402 Index — search 15,000+ paid API endpoints across L402, x402, and MPP protocols with real-time health monitoring

Cross-protocol payment router for AI agents. Handles x402 (USDC), L402 (Lightning), and Solana SPL payments transparently.

Mycelia Signal sovereign price oracle plugin for ElizaOS — cryptographically signed price attestations via Lightning (L402) or USDC on Base (x402)