{
  "name": "SingIt",
  "description": "SingIt: x402 USDC payments for AI agents, with spending limits. MCP server (free tools without a key; paid tools within owner-set key limits) and an OpenAI-compatible x402 API: 220 chat, 54 image, 24 image_edit, 1 embeddings, 14 speech, 3 search, web search, images and speech on Base and Solana. This is a discovery card, not an A2A task endpoint. The interface protocolVersion is the MCP version, 2025-06-18.",
  "version": "1.0.0",
  "supportedInterfaces": [
    {
      "url": "https://app.singitai.app/mcp",
      "protocolBinding": "https://modelcontextprotocol.io/specification/2025-06-18/basic/transports#streamable-http",
      "protocolVersion": "2025-06-18"
    }
  ],
  "provider": {
    "organization": "SingIt",
    "url": "https://singitai.app/"
  },
  "documentationUrl": "https://singitai.app/docs/mcp-key/",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false
  },
  "defaultInputModes": [
    "application/json",
    "text/plain"
  ],
  "defaultOutputModes": [
    "application/json",
    "text/plain"
  ],
  "skills": [
    {
      "id": "key-spending-limits",
      "name": "Key spending limits",
      "description": "get_limits, get_allowance and get_receipts read key limits, what is left before a call and spend. On Solana, SingIt's server checks the daily and per-purchase limits; the chain only caps the total delegated. Caps apply only to calls with that key to SingIt MCP and its /v1 endpoint; they do not limit spending elsewhere or protect an agent\u2019s own wallet.",
      "tags": [
        "limits",
        "receipts"
      ],
      "examples": [
        "Show my daily spending limit and receipts."
      ]
    },
    {
      "id": "free-model-answers",
      "name": "Free model answers",
      "description": "Limited free model answers without a wallet or key.",
      "tags": [
        "llm",
        "free"
      ],
      "examples": [
        "Answer a question for free."
      ]
    },
    {
      "id": "paid-model-answers-x402",
      "name": "Paid model answers over x402",
      "description": "Pay per call in USDC on Base or Solana through the x402 API. Use singit/auto to pick a model by tier.",
      "tags": [
        "llm",
        "x402"
      ],
      "examples": [
        "Choose a model with singit/auto and explain x402."
      ]
    },
    {
      "id": "web-search-and-page-reading",
      "name": "Web search and page reading",
      "description": "Paid calls with a SingIt key and search scope on Base or Solana.",
      "tags": [
        "search",
        "mcp"
      ],
      "examples": [
        "Search the web for recent AI research."
      ]
    },
    {
      "id": "price-lookups",
      "name": "Price lookups",
      "description": "Free crypto, metal and FX price lookups without a key.",
      "tags": [
        "prices",
        "free"
      ],
      "examples": [
        "What is the current ETH price?"
      ]
    }
  ],
  "url": "https://ask.singitai.app",
  "iconUrl": "https://singitai.app/assets/icons/icon-512.png",
  "securitySchemes": {
    "x402": {
      "type": "apiKey",
      "in": "header",
      "name": "PAYMENT-SIGNATURE",
      "description": "x402 v2 payment signature from the 402 response; USDC on Base or Solana."
    },
    "bearer": {
      "type": "http",
      "scheme": "bearer",
      "description": "SingIt API key (sk_singit_...) for the MCP server and app.singitai.app/v1; the owner's limits apply to calls made with it."
    }
  },
  "security": [
    {
      "x402": []
    },
    {
      "bearer": []
    }
  ],
  "links": {
    "llms": "https://ask.singitai.app/llms.txt",
    "llmsFull": "https://ask.singitai.app/llms-full.txt",
    "openapi": "https://ask.singitai.app/openapi.json",
    "x402Manifest": "https://ask.singitai.app/.well-known/x402",
    "skill": "https://ask.singitai.app/SKILL.md",
    "models": "https://ask.singitai.app/v1/models",
    "pricing": "https://ask.singitai.app/pricing.json",
    "mcpKeyDocs": "https://singitai.app/docs/mcp-key/",
    "terms": "https://singitai.app/terms/",
    "privacy": "https://singitai.app/privacy/"
  }
}