API Playground
Test verified public APIs in your browser via a security-hardened proxy — only 2,606 allowlisted APIs can be reached. Built for single-endpoint APIs and large surfaces like Plaid or Slack.
Endpoints
1
Lookup
Request
proxy validates path
www.smarty.com· SSRF-safe proxyApplied to this request only — never stored, never sent anywhere but the API you're calling.
query · required — Embedded API key used for authentication.
query · required — The part of the address that has already been typed (max 32 characters).
query · limit — Maximum number of address suggestions to return; range [1,10].
query — Limit results to only the listed cities (and the state after the list).
query — Limit results to only the listed states (or keywords CONTIGUOUS / ALLSTATES).
query — Limit results to only the listed ZIP Codes (cannot be combined with other city/state filters).
query — Exclude the listed states from results (cannot be combined with include_* filters).
query — Boost suggestions from the listed cities to the top of the list.
query — Boost suggestions from the listed states to the top of the list.
query — Boost suggestions from the listed ZIP Codes to the top of the list (cannot be combined with other city/state filters).
query — Percentage of suggestions that should be preferred (0‑100).
query — Determines whether to use the requester's IP to add city/state to preferences; values: empty/string (city), none, city.
query — Used to request a list of secondary numbers for a selected address (up to 100).
query — Include results from alternate data sources; values: all, postal.
Response
Send a request to see the real response here — status, timing, and body.
The playground routes through a security-hardened proxy. Only allowlisted hosts are reachable. Try US Autocomplete to start.