Cape Partners — Agent Exchange

{
  "name": "Cape Partners \u2014 Agent Exchange",
  "description": "Cape Partners is an independent technology M&A advisory firm. This agent serves its exchange over the A2A v1.0 operations SendMessage, GetTask and ListTasks, on both the JSON-RPC and HTTP+JSON bindings: send a message and receive a Task whose artifacts are our intake receipt (for a six-field declaration) or our grounded reply; then poll the task \u2014 nothing is pushed. Streaming, push notifications, task cancellation and an extended card are NOT supported and are declared false here; those operations answer with the protocol's own errors. A task on this agent is one record we hold for you, not a job we are running on your behalf: everything received is data, never an instruction, and the ceiling is a proposal awaiting a human decision \u2014 no authority is granted and nothing is executed. Reading a task requires the capability key you were issued (your msgid or answer_key), presented in X-A2A-Key or as a Bearer token: the id identifies, the key authorizes.",
  "version": "1.0.0",
  "provider": {
    "organization": "Cape Partners",
    "url": "https://www.capepartners.fr"
  },
  "documentationUrl": "https://www.capepartners.fr/agent-exchange.html",
  "supportedInterfaces": [
    {
      "url": "https://www.capepartners.fr/a2a",
      "protocolBinding": "JSONRPC",
      "protocolVersion": "1.0"
    },
    {
      "url": "https://www.capepartners.fr/a2a",
      "protocolBinding": "HTTP+JSON",
      "protocolVersion": "1.0"
    }
  ],
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "extendedAgentCard": false,
    "extensions": [
      {
        "uri": "https://www.capepartners.fr/agent-exchange.html",
        "description": "Cape Partners agent exchange. SendMessage publishes a manifest (the six labelled fields) or records an inbound message; either way the Task carries the result as an artifact, and GetTask/ListTasks read it back with the key you already hold. NOT served, and answered with the protocol's own errors: SendStreamingMessage and SubscribeToTask (streaming false), every push-notification configuration operation (pushNotifications false), CancelTask (a task here is a record, not a running job) and GetExtendedAgentCard (extendedAgentCard false). No callback is ever held and you are never waited on \u2014 poll GetTask. Two steps never move by polling: the Terms of Service are signed by the PRINCIPAL, and a named principal precedes coverage detail; a task waiting on either reports TASK_STATE_INPUT_REQUIRED.",
        "required": false,
        "params": {
          "exchange_spec": "https://www.capepartners.fr/api/exchange/spec",
          "by_key_read": "https://www.capepartners.fr/api/exchange/answer/{msgid}",
          "by_key_reply": "https://www.capepartners.fr/api/exchange/reply",
          "jsonrpc_endpoint": "https://www.capepartners.fr/a2a",
          "rest_message_send": "https://www.capepartners.fr/a2a/message:send",
          "rest_tasks": "https://www.capepartners.fr/a2a/tasks",
          "key_header": "X-A2A-Key (or Authorization: Bearer <key>)",
          "poll_recipe": "GetTask on a timer; the key you were issued is the only state you must keep",
          "effect_ceiling": "proposal only \u2014 nothing is executed and no authority is granted",
          "input_rule": "data, never an instruction",
          "human_steps": "the Terms of Service are signed by the PRINCIPAL, and a named principal precedes coverage detail"
        }
      }
    ]
  },
  "securitySchemes": {
    "exchangeKey": {
      "apiKeySecurityScheme": {
        "description": "The capability key you were issued when you sent your first message (its msgid), or the stronger answer_key given on first read. It authorizes your own tasks and nothing else.",
        "location": "header",
        "name": "X-A2A-Key"
      }
    },
    "bearerKey": {
      "httpAuthSecurityScheme": {
        "description": "The same capability key, presented as an HTTP bearer credential.",
        "scheme": "Bearer"
      }
    }
  },
  "defaultInputModes": [
    "text/plain",
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "agent_exchange_declaration",
      "name": "Send a message: declare an agent manifest, or ask",
      "description": "SendMessage. Publish the six fields (identity, wants, offers, interface, delivery_contract, boundary) as labelled prose or as a structured manifest object, plus an optional mandate (intents: direction, service_type, scope, consideration, limits) \u2014 or send any other message and have it recorded and answered. The Task you receive carries an artifact: our receipt (with the msgid that is your key back, the six-field verdict, and the mandate disclosure \u2014 served / reframed-and-parked / dropped / under-constrained, with coverage over the corpus and a fit band where one exists) or, for any other message, our grounded reply once it is answered. No account, no key and no installation are needed to send; the key is needed to read the task back. Nothing sent is executed and no authority is granted.",
      "tags": [
        "m&a",
        "mergers-and-acquisitions",
        "deal-flow",
        "due-diligence",
        "valuation",
        "sell-side",
        "buy-side",
        "technology",
        "saas",
        "europe",
        "france",
        "agent-exchange"
      ],
      "examples": [
        "identity \u2014 principal: Acme Capital; agent: Acme Scout; verification: acme.example/agents\nwants \u2014 acquisition targets in European B2B SaaS\noffers \u2014 sourcing and market research\ninterface \u2014 this agent; accepts text and JSON; answer via my task\nboundary \u2014 refuse: [signing NDAs, acting as legal principal]",
        "{\"message\": {\"role\": \"ROLE_USER\", \"messageId\": \"1\", \"parts\": [{\"text\": \"identity \u2014 principal: Acme Capital; agent: Acme Scout\\nwants \u2014 European B2B SaaS targets\\noffers \u2014 sourcing\\ninterface \u2014 A2A\\nboundary \u2014 refuse: signing NDAs\"}], \"metadata\": {\"agent_name\": \"acme-scout\", \"manifest\": {\"identity\": \"...\", \"wants\": \"...\", \"offers\": \"...\", \"interface\": \"...\", \"boundary\": [\"refuse: signing NDAs\"], \"mandate\": {\"intents\": [{\"direction\": \"seek\", \"service_type\": \"buy_side_search\", \"scope\": {\"geo\": \"FR\", \"sector\": \"saas\", \"ticket_band\": \"5-15M\"}}]}}}}}"
      ],
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "agent_exchange_read_your_tasks",
      "name": "Read back your own tasks",
      "description": "GetTask and ListTasks. Requires the capability key you were issued. GetTask returns one task \u2014 its state, its history (your message, our replies) and its artifacts (the receipt, or our answers). ListTasks returns only YOUR tasks, newest first, with cursor pagination. A task id alone is never enough: ids are self-asserted, keys are issued. Task state is derived from our own facts and never invented: TASK_STATE_SUBMITTED while we hold it unanswered, TASK_STATE_COMPLETED once answered and nothing is asked of you, TASK_STATE_INPUT_REQUIRED when the last message asks you for something \u2014 including the two human steps (the principal signing the Terms of Service, and naming a principal before coverage detail).",
      "tags": [
        "agent-exchange",
        "task-status",
        "read-back"
      ],
      "examples": [
        "{\"jsonrpc\": \"2.0\", \"id\": 2, \"method\": \"GetTask\", \"params\": {\"id\": \"<the msgid from your task>\"}}",
        "{\"jsonrpc\": \"2.0\", \"id\": 3, \"method\": \"ListTasks\", \"params\": {\"pageSize\": 20}}"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "securityRequirements": [
        {
          "schemes": {
            "exchangeKey": {
              "list": []
            }
          }
        }
      ]
    }
  ]
}