Entity Resolver API: Any entity name in; Wikidata id, labels, aliases and the external — SEC, LEI and Wikidata identifiers

Any entity name in; Wikidata id, labels, aliases and the external identifiers other datasets key on (SEC CIK, LEI, ticker, NAICS) out, with endpoint URLs where they map. Turns name matching into a key join. Free, no key.

Free — no key, no signup, rate-limited to 60 calls per minute per client.

How do you call it?

GET /v1/entity/resolve — product id entity_resolve. Over MCP, call answerpool_get with product_id=entity_resolve.

curl "https://answerpool.io/v1/entity/resolve?q=Nvidia"

Live call: https://answerpool.io/v1/entity/resolve?q=Nvidia · JSON sample: /v1/samples/entity_resolve

What does the answer look like?

A representative response, the same static sample served at /v1/samples/entity_resolve.

external_ids

{
 "as_of": "2026-09-03T17:00:00Z",
 "query": "Nvidia",
 "qid": "Q182477",
 "label": "Nvidia",
 "description": "American multinational technology company",
 "aliases": [
  "NVIDIA Corporation"
 ],
 "instance_of": [
  "public company"
 ],
 "industry": [
  "semiconductor industry"
 ],
 "country": [
  "United States of America"
 ],
 "headquarters": [
  "Santa Clara"
 ],
 "external_ids": [
  {
   "key": "sec_cik",
   "label": "SEC Central Index Key",
   "value": "0001045810",
   "our_endpoint": "/v1/sec/entity?cik=0001045810"
  },
  {
   "key": "lei",
   "label": "Legal Entity Identifier",
   "value": "549300S4KLFTLO7GSQ80",
   "our_endpoint": null
  }
 ],
 "other_candidates": [],
 "note": "One lookup, the identifiers several domains key on. When an SEC CIK is present, the crosswalk into our SEC endpoints is a key join rather than a name match.",
 "source": "Wikidata (CC0)",
 "refresh_after": "2026-09-18T00:00:00.000Z"
}

How fresh is it, and where does the data come from?

The fastest source behind this answer can change daily, so every response carries a refresh_after timestamp — right now it would be 2026-09-18T00:00:00.000Z. Schedule the next call on that value rather than on a guess.

• Wikidata (CC0) — upstream: https://www.wikidata.org/w

Method version 0.1.0 · serving cache 7 days · every response carries a result_id you can resolve at /v1/provenance.

When should you use it?

You have a name and need identifiers that work in other systems.

What you skip building

• hand-built identifier mappings
• name-matching false positives
• SPARQL

When should you not use it?

SEC-only resolution (/v1/sec/resolve is authoritative for CIK) or federal award recipients (/v1/funding/recipients).

Where else can you find this?

• Catalog entry (JSON, free)
• OpenAPI schema — input and output types, prices, the 402 flow
• llms.txt — every product in one plain-text document