US Autocomplete
US Autocomplete — free tier with API key
US Autocomplete exposes a free-tier JSON API. Register for an API key if required; we verified a public or demo endpoint.
We probe without your API key. A 401/403 auth wall means the server is up — not a full health pass. Open provider docs ↗
On our probe schedule. Uptime charts appear after the first check lands.
GET https://us-autocomplete-pro.api.smarty.com/lookup?key=YOUR+EMBEDDED+KEY+HERE\u0026search=123+mai\u0026include_only_cities=chicago%2Cil\u0026include_only_states=mi\u0026prefer_states=il
{
"errors": [
{
"id": 1611079217,
"message": "Authentication required (1611079217)"
}
]
}curl "https://us-autocomplete-pro.api.smarty.com/lookup?key=YOUR+EMBEDDED+KEY+HERE\u0026search=123+mai\u0026include_only_cities=chicago%2Cil\u0026include_only_states=mi\u0026prefer_states=il"const res = await fetch("https://us-autocomplete-pro.api.smarty.com/lookup?key=YOUR+EMBEDDED+KEY+HERE\u0026search=123+mai\u0026include_only_cities=chicago%2Cil\u0026include_only_states=mi\u0026prefer_states=il");
const data = await res.json();
console.log(data);import requests
res = requests.get("https://us-autocomplete-pro.api.smarty.com/lookup?key=YOUR+EMBEDDED+KEY+HERE\u0026search=123+mai\u0026include_only_cities=chicago%2Cil\u0026include_only_states=mi\u0026prefer_states=il")
print(res.json())/lookup?key=YOUR+EMBEDDED+KEY+HERE\u0026search=123+mai\u0026include_only_cities=chicago%2Cil\u0026include_only_states=mi\u0026prefer_states=ilPROBEDUS Autocomplete — free tier with API key
/lookup?limit=5Lookup — documented GET route.
/lookup?page=1Lookup — documented GET route.
We probe without your API key. A 401/403 auth wall means the server is up — not a full health pass. Export includes every documented route below.
Not tracked yet. Shape-change history starts once this API joins our probe schedule.
US Autocomplete: common questions
Is US Autocomplete free to use?
Yes — US Autocomplete is a free developer tools API. Free tier: Free tier — API key required. Whether the free tier allows commercial use is unclear — check the provider docs.
Does US Autocomplete need an API key?
Yes — US Autocomplete needs a free API key, which you pass on each request. Rate limits: Unpublished.
Can I call US Autocomplete from the browser?
Yes — US Autocomplete returns CORS headers over HTTPS, so front-end code can fetch it directly with no backend proxy. Use the fetch snippet on this page, or hit "Run live" to try it now.
Is US Autocomplete up right now?
US Autocomplete is catalogued but not yet on our probe schedule, so we don't publish a live status for it. Check the provider's own status page or docs for its current state.