List this agent client’s buyer conversations

GET /api/v1/buyer/sessions

{
  "x-response-schema-completeness": "modeled",
  "x-rate-limit": {
    "requests": 300,
    "windowMilliseconds": 60000,
    "key": "request IP",
    "headers": [
      "x-ratelimit-limit",
      "x-ratelimit-remaining",
      "x-ratelimit-reset"
    ]
  },
  "x-idempotency": {
    "policy": "not-generalized",
    "note": "There is no universal Idempotency-Key middleware. Only the documented endpoint mechanisms protect retries."
  }
}

{
  "operationId": "get_api_v1_buyer_sessions",
  "summary": "List this agent client’s buyer conversations",
  "description": "Authenticated and advertiser scoped. Cross-tenant resource access returns 404. Product/channel entitlements also apply.",
  "tags": [
    "Buyer"
  ],
  "security": [
    {
      "bearerAuth": []
    }
  ],
  "parameters": [
    {
      "name": "limit",
      "in": "query",
      "required": false,
      "schema": {
        "type": "integer",
        "minimum": 1,
        "maximum": 100,
        "default": 20
      },
      "style": "form",
      "explode": true
    }
  ],
  "responses": {
    "400": {
      "description": "Invalid request or unsupported fields",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
          }
        }
      }
    },
    "401": {
      "description": "Missing or invalid authentication",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
          }
        }
      }
    },
    "403": {
      "description": "Permission or product scope refused",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
          }
        }
      }
    },
    "404": {
      "description": "Route or tenant-scoped resource not found",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
          }
        }
      }
    },
    "409": {
      "description": "State, revision, approval, funding or idempotency conflict",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
          }
        }
      }
    },
    "422": {
      "description": "Supplier configuration, capability or upstream refusal",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
          }
        }
      }
    },
    "429": {
      "description": "Rate limit reached; wait before retrying",
      "headers": {
        "x-ratelimit-limit": {
          "description": "Maximum requests permitted in the current rate-limit window.",
          "schema": {
            "type": "integer"
          }
        },
        "x-ratelimit-remaining": {
          "description": "Requests remaining in the current window.",
          "schema": {
            "type": "integer"
          }
        },
        "x-ratelimit-reset": {
          "description": "Seconds until the current rate-limit window resets.",
          "schema": {
            "type": "integer"
          }
        },
        "retry-after": {
          "description": "Minimum seconds to wait before retrying.",
          "schema": {
            "type": "integer"
          }
        }
      },
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
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      }
    },
    "500": {
      "description": "Internal error; inspect state before retrying a mutation",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
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        }
      }
    },
    "503": {
      "description": "Dependency or authentication verifier unavailable",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Error"
          }
        }
      }
    },
    "2XX": {
      "description": "Successful response.",
      "headers": {
        "x-ratelimit-limit": {
          "description": "Maximum requests permitted in the current rate-limit window.",
          "schema": {
            "type": "integer"
          }
        },
        "x-ratelimit-remaining": {
          "description": "Requests remaining in the current window.",
          "schema": {
            "type": "integer"
          }
        },
        "x-ratelimit-reset": {
          "description": "Seconds until the current rate-limit window resets.",
          "schema": {
            "type": "integer"
          }
        }
      },
      "content": {
        "application/json": {
          "schema": {
            "type": "object",
            "properties": {
              "sessions": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "id": {
                      "type": "string",
                      "format": "uuid"
                    },
                    "workflow": {
                      "type": "string",
                      "enum": [
                        "brief_to_plan",
                        "creative_direction",
                        "campaign_review",
                        "launch_assistance"
                      ]
                    },
                    "context": {
                      "type": "object",
                      "properties": {
                        "campaignId": {
                          "type": "string",
                          "minLength": 1,
                          "maxLength": 128
                        },
                        "planId": {
                          "type": "string",
                          "minLength": 1,
                          "maxLength": 128
                        },
                        "personaId": {
                          "type": "string",
                          "minLength": 1,
                          "maxLength": 128
                        },
                        "creativeId": {
                          "type": "string",
                          "minLength": 1,
                          "maxLength": 128
                        }
                      },
                      "additionalProperties": false
                    },
                    "revision": {
                      "type": "integer",
                      "exclusiveMinimum": 0
                    },
                    "activeTurnId": {
                      "anyOf": [
                        {
                          "type": "string",
                          "format": "uuid"
                        },
                        {
                          "type": "null"
                        }
                      ]
                    },
                    "status": {
                      "type": "string",
                      "enum": [
                        "running",
                        "idle"
                      ]
                    },
                    "productScope": {
                      "type": "object",
                      "properties": {
                        "product": {
                          "type": "string",
                          "enum": [
                            "adbuymcp",
                            "doohmcp",
                            "ctvmcp"
                          ]
                        },
                        "channels": {
                          "type": "array",
                          "items": {
                            "type": "string",
                            "enum": [
                              "ctv",
                              "audio",
                              "tv",
                              "cinema",
                              "dooh",
                              "search",
                              "social"
                            ]
                          },
                          "minItems": 1,
                          "maxItems": 7
                        }
                      },
                      "required": [
                        "product",
                        "channels"
                      ],
                      "additionalProperties": false
                    },
                    "references": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "kind": {
                            "type": "string",
                            "enum": [
                              "persona",
                              "plan",
                              "campaign",
                              "creative",
                              "asset",
                              "mission",
                              "run"
                            ]
                          },
                          "id": {
                            "type": "string",
                            "minLength": 1,
                            "maxLength": 128
                          }
                        },
                        "required": [
                          "kind",
                          "id"
                        ],
                        "additionalProperties": false
                      },
                      "maxItems": 32
                    },
                    "createdAt": {
                      "type": "string",
                      "format": "date-time"
                    },
                    "updatedAt": {
                      "type": "string",
                      "format": "date-time"
                    }
                  },
                  "required": [
                    "id",
                    "workflow",
                    "context",
                    "revision",
                    "activeTurnId",
                    "status",
                    "productScope",
                    "references",
                    "createdAt",
                    "updatedAt"
                  ],
                  "additionalProperties": false
                }
              }
            },
            "required": [
              "sessions"
            ],
            "additionalProperties": true
          }
        }
      }
    }
  },
  "x-response-schema-completeness": "modeled",
  "x-rate-limit": {
    "requests": 300,
    "windowMilliseconds": 60000,
    "key": "request IP",
    "headers": [
      "x-ratelimit-limit",
      "x-ratelimit-remaining",
      "x-ratelimit-reset"
    ]
  },
  "x-idempotency": {
    "policy": "not-generalized",
    "note": "There is no universal Idempotency-Key middleware. Only the documented endpoint mechanisms protect retries."
  }
}