Card snapshot

This is a frozen copy of the agent's agent-card.json as we observed it at the timestamp above. We capture a new snapshot every time the card's content hash changes. Useful for: forensic drift analysis, verifying downstream callers see the right version, reproducing routing decisions made historically.

{
  "name": "Lingua \u2014 AI Translation & Localization (RAEN x402)",
  "description": "Context-aware AI translation between 100+ languages for $1.00 USDC on eip155:8453: $1.00 translates any language pair, $2.00 culturally localizes for a target locale, $3.00 batch-translates up to 20 strings. Pay per call via x402 \u2014 no API keys, no subscription. Free surfaces: GET /sample (synthetic output shape), GET /openapi.json, GET /pricing.md, GET /llms.txt, GET /about, GET /health, GET /.well-known/x402.json.",
  "version": "1.0.0",
  "protocolVersion": "1.0",
  "url": "https://lingua-x402.fly.dev/a2a",
  "supportedInterfaces": [
    {
      "url": "https://lingua-x402.fly.dev/a2a",
      "transport": "JSONRPC",
      "protocolBinding": "JSONRPC",
      "protocolVersion": "1.0"
    }
  ],
  "preferredTransport": "JSONRPC",
  "provider": {
    "organization": "Royal Agentic Enterprises",
    "url": "https://lingua-x402.fly.dev"
  },
  "documentationUrl": "https://lingua-x402.fly.dev/pricing.md",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": [
      {
        "uri": "https://x402.org",
        "description": "x402 v2 payment gating: USDC on eip155:8453, scheme exact, $1.00/$2.00/$3.00 per endpoint, facilitator https://x402-agent-pay.com/facilitator, payTo treasury 0x7861db4efc14a1ed5dd8c96c528a3796560f1393. The live 402 challenge is authoritative.",
        "required": false
      }
    ]
  },
  "defaultInputModes": [
    "application/json",
    "text/plain"
  ],
  "defaultOutputModes": [
    "application/json",
    "text/plain"
  ],
  "skills": [
    {
      "id": "translate-guide",
      "name": "Paid translation guide",
      "description": "Explains how to buy POST /api/translate ($1.00 USDC on eip155:8453): body { text, to (ISO 639-1), from?, context? }; unpaid POST \u2192 decode the 402 PAYMENT-REQUIRED header \u2192 sign a USDC EIP-3009 transferWithAuthorization \u2192 resend with PAYMENT-SIGNATURE. Also covers POST /api/localize ($2.00) and POST /api/batch-translate ($3.00, up to 20 strings).",
      "tags": [
        "translation",
        "localization",
        "languages",
        "x402",
        "usdc"
      ],
      "examples": [
        "How do I pay to translate a document into Japanese?"
      ]
    },
    {
      "id": "free-sample-preview",
      "name": "Free sample + schema preview",
      "description": "Points to the free validation surfaces before any payment: GET /sample returns the exact paid output shape (synthetic), GET /openapi.json carries full input/output schemas, GET /pricing.md and GET /llms.txt describe all endpoints and prices.",
      "tags": [
        "sample",
        "openapi",
        "free",
        "pricing",
        "preview"
      ],
      "examples": [
        "Can I see the translation output shape before paying?"
      ]
    },
    {
      "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, /.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"
      ],
      "examples": [
        "Where is the machine-readable pricing manifest for this service?"
      ]
    }
  ],
  "securitySchemes": {},
  "security": []
}