Fact Check

Fact-check an article or a claim

Verifies factual claims against APITube’s live news corpus (retrieval-augmented). Accepts an article id (loaded from the corpus), raw article text, or a single claim. Returns per-claim verdicts on an 8-level scale with calibrated confidence, an explanation, and the supporting/refuting evidence articles.

post/v1/fact-check

Request

  • Base URL: https://api.apitube.io
  • URL: https://api.apitube.io/v1/fact-check
  • Auth: one of:
    • API key in header X-API-Key
    • API key in query parameter api_key

Request body

idinteger

APITube article id to fact-check. The article is loaded from the corpus and its claims are extracted and verified. Takes priority over text and claim.

textstring

Raw article text (title + body), 100–10000 characters. Claims are extracted automatically.

claimstring

A single factual statement to verify directly (5–500 characters).

max_claimsinteger

Maximum number of claims to extract and verify (capped server-side).

evidence_per_claiminteger

Maximum number of evidence articles to retrieve per claim (capped server-side).

Example request

{
  "id": 123456789,
  "claim": "OpenAI released GPT-5 in 2024",
  "max_claims": 5,
  "evidence_per_claim": 5
}

Response

Fact-check result

status'ok'
request_idstring nullable

Changes

No recorded changes to this operation across all 1 revision of this API.