generated: '2026-07-19'
method: searched
source: https://web.archive.org/web/2024/https://docs.ledgerx.com/reference/action-report-status-codes
docs: https://docs.miaxdx.com/reference/action-report-status-codes
format: proprietary-numeric
note: >-
  MIAXdx (LedgerX) publishes no RFC 9457 problem types and no OpenAPI. REST endpoints use standard
  HTTP status codes (2xx success, 4xx client data error, 5xx server error). The exchange's real
  error/outcome vocabulary lives on the WebSocket action_report message as a numeric status_code
  with optional reason sub-codes; that registry is captured below.
rest:
  style: standard-http
  classes:
  - status: 2xx
    meaning: Successful
  - status: 4xx
    meaning: There was an error with the data provided
  - status: 429
    meaning: Rate limit exceeded; subsequent requests are blocked for a period
  - status: 5xx
    meaning: Server-side error at the exchange
  source: https://web.archive.org/web/2024/https://docs.ledgerx.com/reference/status-codes
envelope:
  transport: websocket action_report message
  field: status_code
  reason_field: status_reason
status_codes:
- code: 200
  meaning: A resting limit order was inserted
  outcome: success
- code: 201
  meaning: A cross (trade) occurred
  outcome: success
  reason_codes:
  - code: 52
    meaning: Full fill
  note: >-
    Two action report instances with status_code 201 are sent for each two-sided trade.
- code: 202
  meaning: A market order was not filled
  outcome: rejected
- code: 203
  meaning: An order was successfully canceled
  outcome: success
  reason_codes:
  - code: 53
    meaning: Canceled by the exchange
- code: 204
  meaning: An order was successfully canceled and replaced
  outcome: success
- code: 300
  meaning: Message acknowledged (returns a ticket ID called mid to track subsequent replies)
  outcome: acknowledgement
- code: 600
  meaning: Contract not found
  outcome: error
  action: Verify the contract_id against GET /trading/contracts.
- code: 601
  meaning: Order ID (mid) not found
  outcome: error
  action: The order may already be filled or canceled; re-check open orders.
- code: 602
  meaning: Invalid order ID (mid)
  outcome: error
  action: Send the mid exactly as returned by the order submission response.
- code: 607
  meaning: Order rejected
  outcome: error
- code: 609
  meaning: Insufficient collateral
  outcome: error
  action: Check account balances before resubmitting.
- code: 610
  meaning: Contract expired
  outcome: error
- code: 613
  meaning: Price threshold exceeded
  outcome: error
- code: 614
  meaning: Contract not active
  outcome: error
- code: 616
  meaning: Invalid block size (block trades)
  outcome: error
- code: 801
  meaning: Exchange is closed
  outcome: error
  action: >-
    Check is_exchange_open on the heartbeat message and the exchange_next_open_ts timestamp
    before retrying.