generated: '2026-07-22'
method: searched
source: https://www.marketdata.app/docs/api/
modes:
  test_vs_live: >-
    Market Data has no separate sandbox environment; instead, specific demo
    symbols are unlocked on the production API with no authentication token,
    and specific trial symbols are exempt from API-credit consumption.
demo_symbols:
  description: Endpoints usable with NO token (historical data only), no registration required.
  values:
    - endpoint_family: stocks
      symbol: AAPL
    - endpoint_family: options
      symbol: AAPL271217C00250000
      notes: Any AAPL option contract works.
    - endpoint_family: funds
      symbol: VFINX
credit_exempt_symbols:
  description: Free trial symbols that never consume API credits on any plan.
  values:
    - AAPL (stock)
    - AAPL options
    - VIX (index)
    - VFINX (mutual fund)
trial:
  description: >-
    30-day free trial after registering (no credit card required); after the
    trial, accounts keep 100 free requests per day on the Free Forever plan.
  signup: https://www.marketdata.app/signup/
try_it:
  swagger_ui: https://api.marketdata.app/
  postman: https://app.getpostman.com/run-collection/27146376-b1331cd2-4749-4708-96fe-2f1708b02854?action=collection%2Ffork&source=rip_markdown&collection-url=entityId%3D27146376-b1331cd2-4749-4708-96fe-2f1708b02854%26entityType%3Dcollection%26workspaceId%3Dbd65af1d-3c36-4e62-ae64-f71008c154b4