Ambr

{
  "name": "Ambr",
  "description": "The liability record for autonomous agents. Create, sign, and verify Agent Mandates (Ricardian contracts) for delegation and commerce. Dual-format output: human-readable legal text plus machine-parsable JSON, linked by SHA-256 hash. Legible by construction.",
  "url": "https://getamber.dev/api/a2a",
  "version": "1.0.0",
  "apiVersion": "1.0.0",
  "platformVersion": "0.3.4",
  "releasedAt": "2026-04-20T00:00:00Z",
  "documentationUrl": "https://ambr.run/llms.txt",
  "provider": {
    "organization": "Ambr",
    "url": "https://ambr.run"
  },
  "supported_interfaces": [
    {
      "url": "https://getamber.dev/api/a2a",
      "protocol_binding": "jsonrpc/http",
      "protocol_version": "1.0.0"
    }
  ],
  "additionalInterfaces": [
    {
      "url": "https://getamber.dev/api/mcp",
      "kind": "mcp",
      "protocolVersion": "2026-07-28",
      "description": "Model Context Protocol (Streamable HTTP, stateless JSON mode)."
    },
    {
      "url": "https://getamber.dev/api/health",
      "kind": "health",
      "description": "Public health endpoint \u2014 readiness probe for dependencies."
    }
  ],
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extendedAgentCard": false
  },
  "pricing": {
    "source": "https://getamber.dev/api/v1/pricing",
    "currency": "USD",
    "unit": "per contract",
    "freeTier": {
      "creditsPerKey": 500,
      "unit": "cent",
      "renews": false,
      "requires": [
        "verified_email"
      ]
    },
    "note": "Canonical live pricing lives at the source URL. Do not hardcode prices from this card."
  },
  "compliesWith": [
    "urn:ambr:ricardian-v1"
  ],
  "implementsSpec": "https://ambr.run/spec/ricardian-v1",
  "skills": [
    {
      "id": "create_contract",
      "name": "Create Ricardian Contract",
      "description": "Generate a legally-structured dual-format Ricardian Contract from a template. Requires template slug, parameters, and principal declaration. Burns the template price in credits (1 credit = 1 US cent). Output is dual-format by construction and replayable to the original SHA-256 hash \u2014 the basis of Ambr's legibility guarantee.",
      "tags": [
        "legal",
        "contracts",
        "delegation",
        "commerce",
        "ricardian",
        "ai-agents"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "examples": [
        "Create a delegation contract authorizing agent X to make purchases up to $500",
        "Generate an API access agreement for compute services between Company A and Agent B",
        "Draft a task execution contract with a 30-day duration and $1000 spending cap"
      ]
    },
    {
      "id": "list_templates",
      "name": "Browse Contract Templates",
      "description": "List available contract templates with parameter schemas. Categories: delegation (d1-d3), commerce (c1-c3), and consumer (a1-a3). Use this before create_contract so your request conforms to the template schema \u2014 which is itself part of the legibility guarantee.",
      "tags": [
        "templates",
        "catalog",
        "browse"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "examples": [
        "What contract templates are available?",
        "Show me delegation contract templates"
      ]
    },
    {
      "id": "get_contract",
      "name": "Get Contract Details",
      "description": "Retrieve a contract by ID (amb-YYYY-NNNN), SHA-256 hash, or UUID. Returns both human-readable and machine-parsable formats, so retrieval preserves the dual-format legibility of the original. Output is dual-format by construction and replayable to the original SHA-256 hash \u2014 the basis of Ambr's legibility guarantee.",
      "tags": [
        "contracts",
        "retrieval",
        "verification"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "examples": [
        "Get contract amb-2026-0042",
        "Retrieve the contract with hash abc123..."
      ]
    },
    {
      "id": "verify_hash",
      "name": "Verify Contract Integrity",
      "description": "Verify a contract's SHA-256 hash to confirm it hasn't been tampered with. Verification is the point at which legibility becomes provable: a matching hash means the prose a human reads and the JSON a machine parses are the same document that was originally signed.",
      "tags": [
        "verification",
        "integrity",
        "hash",
        "security"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "examples": [
        "Verify that hash abc123... matches a valid contract"
      ]
    },
    {
      "id": "get_status",
      "name": "Check Contract Status",
      "description": "Check contract lifecycle status (draft/active/terminated/etc) and amendment chain. Amendments are bilateral and themselves dual-format \u2014 the chain stays legible from original through every revision.",
      "tags": [
        "status",
        "lifecycle",
        "amendments"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "examples": [
        "What is the status of contract amb-2026-0042?",
        "Check if contract abc123... is still active"
      ]
    },
    {
      "id": "agent_handshake",
      "name": "Agent Handshake",
      "description": "Initiate a handshake on a contract on behalf of the delegating principal. Requires API key with registered delegation. Principal must approve separately. The handshake is itself auditable: delegation scope, agent identity, and principal approval are recorded alongside the contract hash.",
      "tags": [
        "delegation",
        "handshake",
        "agent",
        "intent"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "examples": [
        "Accept contract amb-2026-0042 on behalf of my principal",
        "Handshake contract abc123... with intent to accept",
        "Reject contract amb-2026-0015 and request changes"
      ]
    }
  ],
  "securitySchemes": {
    "apiKey": {
      "type": "apiKey",
      "in": "header",
      "name": "X-API-Key",
      "description": "Pre-registered API key for businesses with credit-based access"
    },
    "x402": {
      "type": "http",
      "scheme": "x402",
      "description": "Pay-per-contract with the x402 v2 protocol (USDC on Base, CAIP-2 network eip155:8453). An unauthenticated request gets 402 with a PAYMENT-REQUIRED header; retry with a PAYMENT-SIGNATURE header from a standard x402 client. Facilitator discovery: {facilitator}/discovery/resources."
    }
  },
  "security_schemes": {
    "apiKey": {
      "type": "apiKey",
      "in": "header",
      "name": "X-API-Key",
      "description": "Pre-registered API key for businesses with credit-based access"
    },
    "x402": {
      "type": "http",
      "scheme": "x402",
      "description": "Pay-per-contract with the x402 v2 protocol (USDC on Base, CAIP-2 network eip155:8453). An unauthenticated request gets 402 with a PAYMENT-REQUIRED header; retry with a PAYMENT-SIGNATURE header from a standard x402 client. Facilitator discovery: {facilitator}/discovery/resources."
    }
  },
  "security": [
    {
      "apiKey": []
    },
    {
      "x402": []
    }
  ],
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "default_input_modes": [
    "application/json"
  ],
  "default_output_modes": [
    "application/json"
  ],
  "extensions": {
    "io.ambr.governance": {
      "principle": "Legibility by construction",
      "summary": "Every action facilitated by Ambr produces a dual-format Ricardian Contract \u2014 the same agreement expressed as human-readable legal prose and machine-parsable JSON, bound by SHA-256. Legible actions can be audited, defended, and amended. Agents grounded in dual-format contracts stay defensible as governance standards harden \u2014 for their principals, their counterparties, and the platforms that host them. Ambr provides that grounding so agents you deploy today are still defensible tomorrow.",
      "basisFor": [
        "audit-trail",
        "bilateral-amendment",
        "delegation-authority",
        "dispute-resolution"
      ],
      "spec": "https://ambr.run/spec/ricardian-v1",
      "urn": "urn:ambr:ricardian-v1"
    }
  },
  "stats": {
    "total_contracts_served": 31,
    "active_contracts": 18,
    "skills_count": 6
  }
}