{"protocolVersion":"0.3.0","name":"SYNTHORA x402 Registry Watch","description":"Signed Ed25519 deltas of the live x402/A2A endpoint registry: new and removed endpoints, payTo address changes, price changes and service listings. Pay-per-event feed for router and discovery agents. Every response carries per-row and whole-response provenance receipts.","url":"https://regwatch.hergertsynthora.com/service","preferredTransport":"HTTP+JSON","additionalInterfaces":[{"url":"https://regwatch.hergertsynthora.com/service","transport":"HTTP+JSON"},{"url":"https://regwatch.hergertsynthora.com/a2a","transport":"JSONRPC"}],"version":"1.0.0","documentationUrl":"https://regwatch.hergertsynthora.com/openapi.json","iconUrl":"https://regwatch.hergertsynthora.com/favicon.ico","provider":{"organization":"HERGERT SYNTHORA","url":"https://hergertsynthora.com"},"capabilities":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false},"defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"skills":[{"id":"registry_feed","name":"x402 registry delta feed","description":"Returns signed deltas of the x402/A2A registry since a cursor: endpoint discovery, payTo address changes, new and removed listings, price moves and uptime state. Body: {since, slug, limit<=200}.","tags":["x402","discovery","registry","crypto","onchain","monitoring","payments"],"inputModes":["application/json"],"outputModes":["application/json"],"examples":["POST https://regwatch.hergertsynthora.com/service with body {\"since\":\"2026-07-01\",\"limit\":50}"]}],"securitySchemes":{"x402":{"type":"http","scheme":"x402","description":"HTTP 402 micropayment. 0.002 USDC on Base (eip155:8453). First 5 calls free per unique Base wallet via X-WALLET header."}},"security":[{"x402":[]}],"x402":{"network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","assetSymbol":"USDC","amount":"2000","priceUsd":"0.002","payTo":"0x10800a5a5B9d72251566EC651E862A8b4B427dE0","resource":"https://regwatch.hergertsynthora.com/service","freeTier":{"calls":5,"per":"unique Base wallet","header":"X-WALLET"}}}