# Wikidata Entity Brief Synthesizer

> Wikidata Entity Brief Synthesizer is a paid API for AI agents from api.fadeandco.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Extracts up to 3 capitalized named entities from a statement and returns their Wikidata ID, label, description, and URL — confirming existence without fact-checking the claim.

## Facts

- Endpoint: POST https://api.fadeandco.workers.dev/api/agent-intel/fact-brief-synthesizer?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wikidata-entity-brief-synthesizer-70bb9872
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FjdBSsj5p0Nrus0TVhriv

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability wikidata-entity-brief-synthesizer-70bb9872 -d '<json body>'
```

Example prompt: Can you pull out the named entities from this sentence and look them up in Wikidata: 'Albert Einstein developed the theory of relativity at the University of Zurich.'?

## When to prefer this

Choose this endpoint when you need to identify and resolve named entities (people, organizations, places, concepts) from a short statement into Wikidata knowledge graph entries, especially when you want structured entity metadata (ID, label, description, URL) without needing claim verification or fact-checking. It is ideal for enriching text with knowledge graph anchors or confirming that mentioned names are real, recognized entities. Prefer alternatives if you need full fact-checking, date/number extraction, or entity resolution from sources other than Wikidata.

## Known failure modes

- No capitalized names found in statement — returns empty entities array
- Capitalized term not in Wikidata — appears in unmatched array
- Statement shorter than 10 or longer than 1000 characters — likely rejected
- Ambiguous or generic capitalized words (e.g. 'The') may not resolve to meaningful entities
- Wikidata API unavailable — upstream dependency failure
- Numbers and dates in the statement are deliberately ignored

## How this service works

Entity brief for a statement: finds up to 3 capitalised names or phrases in it and looks each up in Wikidata (public knowledge graph), returning the Wikidata ID, label, short description and link. It confirms the entities exist; it does NOT judge whether the claim is true, and it finds no numbers or dates.

## Output

A JSON object containing: the original statement, a timestamp, up to 3 matched entities each with their Wikidata ID (e.g. Q7186), canonical label, short description, mention text, and direct Wikidata URL, plus an unmatched array for any capitalized terms not found. A note clarifies that entity existence is confirmed but the truth of the claim is not evaluated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "statement": {
   "type": "string",
   "description": "Sentence or short text, 10 to 1000 characters"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Entities only: Wikidata confirms these names exist. The truth of the statement is not checked.",
  "source": "https://www.wikidata.org/w/api.php",
  "entities": [
   {
    "url": "https://www.wikidata.org/wiki/Q7186",
    "label": "Marie Curie",
    "mention": "Marie Curie",
    "wikidataId": "Q7186",
    "description": "Polish-born French physicist and chemist (1867–1934)"
   },
   {
    "url": "https://www.wikidata.org/wiki/Q7191",
    "label": "Nobel Prize",
    "mention": "Nobel Prize",
    "wikidataId": "Q7191",
    "description": "set of annual international awards, primarily 5 established in 1895 by Alfred Nobel"
   }
  ],
  "checkedAt": "2026-10-23T09:35:16.430Z",
  "statement": "Marie Curie won the Nobel Prize in 1903.",
  "unmatched": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wikidata-entity-brief-synthesizer-70bb9872/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fadeandco.workers.dev](https://www.zero.xyz/host/api.fadeandco.workers.dev/llms.txt)