{"domain":"royal-feel-x402.fly.dev","count":1,"changes":[{"captured_at":"2026-09-28T19:21:16","card_hash":"27cd24531674f45d679480cc19804e1205d8a35edf3784e71a4ea5dfb05422a3","previous_card_hash":null,"diff":{"skills_added":[{"id":"free-sample-preview","name":"Free sample + schema preview","description":"Points to the free validation surfaces before any payment: GET /sample returns a synthetic findings example, GET /openapi.json carries input/output schemas, GET /pricing.md and GET /llms.txt describe endpoints and prices.","tags":["sample","openapi","free","pricing","preview"],"inputModes":null,"outputModes":null},{"id":"lint-copy-guide","name":"Paid FTC copy lint guide","description":"Explains how to buy POST /api/lint-copy ($2.00 USDC on eip155:8453): body { text }; unpaid POST → decode the 402 PAYMENT-REQUIRED header → sign a USDC EIP-3009 transferWithAuthorization → resend with PAYMENT-SIGNATURE. Returns findings with severity, rule_id, snippet, explanation, and suggested rewrite. POST /api/batch-lint ($5.00) lints up to 10 texts in one paid call.","tags":["ftc","compliance","copy","lint","x402","usdc"],"inputModes":null,"outputModes":null},{"id":"machine-readable-surfaces","name":"Machine-readable discovery surfaces","description":"Guides agents to this wall's free machine surfaces: /pricing.md, /llms.txt, /openapi.json, /about, /health, /readyz, /.well-known/x402.json (live 402 accepts), /.well-known/agent-card.json (this card), POST /a2a (A2A v1 JSON-RPC).","tags":["discovery","openapi","x402","a2a","json"],"inputModes":null,"outputModes":null}],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"name","before":null,"after":"Royal Feel — FTC Compliance Copy Linter (RAEN x402)"},{"field":"description","before":null,"after":"Pay $2.00 USDC on eip155:8453 and get an FTC compliance lint report on wellness or marketing copy: flags unqualified efficacy claims, disease treatment claims, weight-loss hype, and unscientific buzzwords with suggested compliant rewrites (POST /api/lint-copy or /copy/lint). Batch up to 10 texts in one call for $5.00 (POST /api/batch-lint). Pay per call via x402 — no API keys, no subscription. Free surfaces: GET /sample, GET /openapi.json, GET /pricing.md, GET /llms.txt, GET /about, GET /health, GET /.well-known/x402.json."},{"field":"version","before":null,"after":"1.0.0"},{"field":"protocolVersion","before":null,"after":"1.0"},{"field":"url","before":null,"after":"https://royal-feel-x402.fly.dev/a2a"},{"field":"documentationUrl","before":null,"after":"https://royal-feel-x402.fly.dev/pricing.md"},{"field":"preferredTransport","before":null,"after":"JSONRPC"},{"field":"supportedInterfaces","before":null,"after":[{"url":"https://royal-feel-x402.fly.dev/a2a","transport":"JSONRPC","protocolBinding":"JSONRPC","protocolVersion":"1.0"}]},{"field":"securitySchemes","before":null,"after":{}},{"field":"security","before":null,"after":[]},{"field":"capabilities","before":null,"after":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $2.00 per lint and $5.00 per batch call, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x7861db4efc14a1ed5dd8c96c528a3796560f1393. The live 402 challenge is authoritative.","required":false}]}},{"field":"provider","before":null,"after":{"organization":"Royal Agentic Enterprises","url":"https://royal-feel-x402.fly.dev"}}],"other_changed":true,"is_empty":false,"human_summary":"added 3 skills · name ∅ → Royal Feel — FTC Compliance Copy Linter  · description ∅ → Pay $2.00 USDC on eip155:8453 and get an · version ∅ → 1.0.0 · protocolVersion ∅ → 1.0 · url ∅ → https://royal-feel-x402.fly.dev/a2a · documentationUrl ∅ → https://royal-feel-x402.fly.dev/pricing. · preferredTransport ∅ → JSONRPC · supportedInterfaces ∅ → https://royal-feel-x402.fly.dev/a2a (JSO · securitySchemes ∅ →  · security ∅ → [] · capabilities ∅ → extensions, pushNotifications, stateTran · provider ∅ → Royal Agentic Enterprises"}}]}