{"id":216015,"name":"SYNTHORA x402 Registry Watch","description":"Real-time x402 endpoint discovery and M2M market-data feed for router agents: live service listings, payTo address changes, x402 registry diff and index deltas. Every response is Ed25519-signed with per-row and whole-response provenance receipts. 0.02 USDC per call via x402 on Base; first 5 calls FREE per unique Base wallet via X-WALLET header. 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No accounts, no signup.","capabilities":{"streaming":false,"pushNotifications":false},"registrations":["eip155:8453:0x8004a169fb4a3325136eb29fa0ceb6d2e539a432/56572","eip155:8453:0x8004a169fb4a3325136eb29fa0ceb6d2e539a432/56577"],"protocolVersion":"0.3.0","documentationUrl":"https://regwatch.hergertsynthora.com/openapi.json","defaultInputModes":["application/json"],"defaultOutputModes":["application/json"]},"signature_status":"unsigned","signature_detail":"No card signature supplied","signature_key_url":null,"signature_checked_at":"2026-10-19T03:46:45.980818+00:00","domain_claimed_at":null,"domain_proof_checked_at":null,"source_name":"Agent Tools Catalog","source_url":"https://agent-tools.cloud","last_check":{"checked_at":"2026-10-19T03:46:45.980818+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"also_published_at":[],"history_urls":["https://regwatch.hergertsynthora.com/.well-known/agent.json"],"also_observed_in":[{"source_name":"Agent Tools Catalog","source_url":"https://agent-tools.cloud","last_seen":"2026-10-18T18:36:25.906877+00:00"}],"skills":[{"skill_id":"registryFeed","name":"x402 Registry Delta Feed","description":"POST JSON {since, slug?, limit<=200} -> signed delta feed of the live x402/M2M market (new endpoints, payTo changes, listings, prices) plus Ed25519 attestation receipt. 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