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POST /metering-services/v1/{mpid}/appoint

Creates a metering service appointment process for one MPAN.

Request​

Method and path:

  • POST /metering-services/v1/{mpid}/appoint

Headers:

  • X-API-KEY (required): string, UUID format.
  • X-IDEMPOTENCY-KEY (required): string.
  • X-TEST-MODE (optional): string ("true" to suppress production comms).

Path parameters:

  • mpid (required): string supplier MPID.

Body schema:

  • MSAppointmentSchemaRequest
{
  "mpan_core": 1234567890123,
  "metering_service_mpid": "MOPX",
  "effective_from": "2026-03-30T00:00:00+00:00",
  "contract_reference": "MSA20260330",
  "appointment_scenario": "COS"
}

Response​

Success:

  • 202 Accepted
  • Body type: SupplierProcessResponseSchema
{
  "request_id": "0f5e0bc6-e9b0-451a-8d5b-15bc01c4d2fd",
  "request_type": "metering-service-appointment",
  "request_status": "Pending",
  "description": "Metering Service Appointment Process",
  "created_at": "2026-03-24T10:35:00+00:00",
  "last_updated_at": "2026-03-24T10:35:00+00:00",
  "mpan_core": 1234567890123
}

Other documented responses:

  • 401 Unauthorized.
  • 409 Conflict.
  • 422 Validation error.
  • 428 Missing X-IDEMPOTENCY-KEY.

Field-level constraints: