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Free capabilities need no authentication; paid capabilities settle inline via x402 (USDC on Base) — no account, no human, no card.","publisher":{"name":"LedgerProof","url":"https://ledgerproofhq.io"},"homepage":"https://ledgerproofhq.io/.well-known/capabilities.json","repository":null,"version":"1.0.0","license":null,"protocols":["a2a","mcp"],"tags":["provenance","verification","free","receipt","evidence","public-record","x402","graph","capability","discovery","mission","settlement","status","proof-gated-settlement","anchored-receipt","usdc","base","agent-commerce","web-search","sanctions-screening","cve","dns","rdap","sec-edgar","fda","gleif","wikidata"],"pricing":null,"endpoints":[{"url":"https://ledgerproofhq.io/api/lain/mcp","type":"mcp_streamable_http","auth":null,"probeable":true}],"skills":[{"id":"verify","name":"Verify a receipt","tags":["provenance","verification","free"],"description":"Independently verify any LedgerProof receipt against the public anchored log — content hash, Ed25519 signature, and anchor. 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