generated: '2026-07-20'
method: searched
source:
  - https://docs.moment.com/reference/getting-started-with-your-api
  - https://docs.moment.com/reference/api-errors
  - https://docs.moment.com/docs/getting-started
  - llms/moment-llms.txt
transport:
  rest:
    description: Simple REST API for reference data, pricing, analytics, and order/execution management.
    versioning: uri-path
    version: v1
    base_path_example: /v1/data/instrument/
  realtime:
    description: >-
      WebSocket (RFC 6455) streams complement the REST API for low-latency
      messaging and status updates (Real-time Orders, Real-time Prices,
      Real-time RFQ).
    url_format: wss://moment-api.com/v{X}/...
    message_envelope: '{"msg_type": "<message_type>", "<key>": "<value>", ...}'
    control_message_types: [error, success, subscription, heartbeat]
    keepalive: >-
      Server sends WebSocket ping frames every 10-15 seconds; clients respond
      with pong. Trading streams may also emit application-level
      {"msg_type":"heartbeat"} messages.
authentication:
  style: api-key
  detail: >-
    Requests are made with an authenticated API key; the caller's organization
    is resolved from the API key. Separate Prod Paper (UAT) API keys select the
    sandbox environment. Exact header name is not published in the docs index.
  see: authentication/moment-authentication.yml
identifiers:
  primary: ISIN
  also_accepts: >-
    Many endpoints auto-detect the symbol type (e.g. CUSIP, ticker) and resolve
    it to the underlying ISIN.
pagination:
  style: present-on-list-endpoints
  detail: >-
    List endpoints (e.g. eligible/tradeable universe, advisor accounts, advisor
    codes) are paginated. Cursor/parameter specifics per endpoint in the API
    reference.
error_handling:
  envelope_fields: [error, error_type, error_details]
  programmatic_key: error_type
  see: errors/moment-error-codes.yml
rate_limiting:
  signaled: true
  headers: [X-RateLimit-*, Retry-After]
  error_type: rate_limited
  detail: >-
    When a rate limit is breached the API returns error_type rate_limited with
    X-RateLimit-* and Retry-After response headers indicating why and when to
    retry.
response_formats:
  - application/json
  - application/x-ndjson  # snapshot endpoints emit newline-delimited JSON (NDJSON)
idempotency:
  supported: false
  detail: No idempotency-key mechanism is documented in the public API reference.
notes: >-
  Cross-links: errors/moment-error-codes.yml, authentication/moment-authentication.yml,
  lifecycle/moment-lifecycle.yml, sandbox/moment-sandbox.yml.