Alpha Vantage API: Quota Units, Coverage & Use Checklist

Data workflow

Market-data and related financial endpoints; choose the exact endpoint, history and adjustment basis.

Documented quota and access

The support page documents 25 requests/day for its standard free service; particular premium endpoints and regulated quote access remain separate.

Use and display boundaries

A working key does not establish commercial display rights. Review current terms and contact the provider for the intended commercial use.

A practical acceptance task

Check one required historical endpoint, the actual plan entitlement and whether the response contains adjusted or unadjusted values. Record the endpoint and quota unit before coding a refresh loop.

Keep the request context

Record endpoint/version, instrument identity, data frequency, timezone, history range, adjustment flags and the account entitlement. Retain only the response/provenance that the applicable terms permit. A generic provider comparison cannot replace a named dataset specification.

Test semantics before scale

Use a small authorized example and inspect status, response schema and any error object inside a successful HTTP response. Check pagination and row ordering. The local daily inspector accepts an explicitly mapped single-series CSV; it is not a universal provider JSON adapter or a certification of source accuracy.

Primary evidence

Alpha Vantage support and free quota · Alpha Vantage terms — checked 17 October 2026. Numeric limits are omitted where no current primary-source plan value was verified; omitted does not mean unlimited.