APITube Fact Check API
Verify factual claims against the live news corpus (retrieval-augmented). Returns per-claim verdicts on an 8-level scale with confidence, explanation, and supporting evidence.
Work with this as data
Every API here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for apis
7 MCP tools reach this
find_apisBrowse and filter every API in the catalog.get_api_artifactsOne API's artifacts, grouped by type.get_openapiThe primary OpenAPI for this API.find_similar_apisAPIs that look like this one.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This API
curl "https://apis.io/api/v1/apis/apitube-fact-check-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"Discovery needs no key. Ratings and market analysis are Pro.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.
OpenAPI Specification
openapi: 3.2.0
info:
title: APITube News Fact Check API
version: 1.0.0
summary: Search and filter news articles from thousands of sources worldwide.
description: 'APITube News API provides programmatic access to a comprehensive, real-time news database aggregated from thousands of sources worldwide. Use it to search, filter, and retrieve news articles with advanced query capabilities.
## Key Endpoints
- **Everything** (`/v1/news/everything`) — full-text search across all indexed articles with filters by title, date range, language, country, source, sentiment, category, topic, industry, and named entities (people, organizations, locations, brands, etc.).
- **Top Headlines** (`/v1/news/top-headlines`) — breaking and trending news from high-authority sources ranked by OPR score.
- **Story** (`/v1/news/story/{articleId}`) — retrieve related articles for a given story.
- **Article** (`/v1/news/article`) — fetch one or more articles by ID.
- **Dictionaries** — list available categories, topics, industries, and entities.
- **Trends** — discover trending topics and entities over time.
- **Stream** (`/v1/news/stream`) — real-time Server-Sent Events (SSE) stream of new articles.
- **Webhooks** — subscribe to push notifications for new articles matching your filters.
## Export Formats
JSON (default), CSV, TSV, XML, RSS, XLSX, Parquet, JSONL, and NDJSON.
## Authentication
All requests require an API key passed via the `X-API-Key` header or the `api_key` query parameter.'
contact:
name: APITube Support
url: https://apitube.io
email: support@apitube.io
termsOfService: https://apitube.io/terms/terms-of-service
servers:
- url: https://api.apitube.io
security:
- ApiKeyHeader: []
- ApiKeyQuery: []
tags:
- name: Fact Check
description: Verify factual claims against the live news corpus (retrieval-augmented). Returns per-claim verdicts on an 8-level scale with confidence, explanation, and supporting evidence.
paths:
/v1/fact-check:
post:
summary: Fact-check an article or a claim
tags:
- Fact Check
description: 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.
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
id:
type: integer
description: 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`.
example: 123456789
text:
type: string
description: Raw article text (title + body), 100–10000 characters. Claims are extracted automatically.
minLength: 100
maxLength: 10000
claim:
type: string
description: A single factual statement to verify directly (5–500 characters).
minLength: 5
maxLength: 500
example: OpenAI released GPT-5 in 2024
max_claims:
type: integer
description: Maximum number of claims to extract and verify (capped server-side).
example: 5
evidence_per_claim:
type: integer
description: Maximum number of evidence articles to retrieve per claim (capped server-side).
example: 5
responses:
'200':
description: Fact-check result
content:
application/json:
schema:
description: Fact-check result
type: object
properties:
status:
type: string
enum:
- ok
request_id:
type:
- string
- 'null'
input:
type: object
properties:
type:
type: string
enum:
- id
- text
- claim
language:
type: string
summary:
type: object
properties:
overall_verdict:
type: string
enum:
- 'true'
- mostly_true
- mixed
- misleading
- mostly_false
- 'false'
- unverified
- outdated
overall_confidence:
type: number
claims_total:
type: integer
claims_checked:
type: integer
verdict_breakdown:
type: object
additionalProperties:
type: integer
claims:
type: array
items:
type: object
properties:
claim:
type: string
normalized_claim:
type: string
checkworthy:
type: boolean
verdict:
type: string
enum:
- 'true'
- mostly_true
- mixed
- misleading
- mostly_false
- 'false'
- unverified
- outdated
confidence:
type: number
description: Calibrated confidence in the verdict (0..1)
as_of:
type: string
description: Date the verdict is valid as of (YYYY-MM-DD)
explanation:
type: string
evidence:
type: array
items:
type: object
properties:
article_id:
type: integer
description: APITube article id of the evidence
title:
type: string
url:
type: string
source:
type: string
description: Source domain
source_authority:
type: integer
description: Source authority/OPR rank (higher = more authoritative)
published_at:
type:
- string
- 'null'
format: date-time
snippet:
type: string
stance:
type: string
enum:
- supports
- refutes
- neutral
relevance:
type: number
description: Relevance of the evidence to the claim (0..1)
'400':
description: Invalid request (no input, or out-of-range text/claim/id)
content:
application/json:
schema:
description: Invalid request (no input, or out-of-range text/claim/id)
type: object
properties:
status:
type: string
enum:
- not_ok
description: Response status
request_id:
type:
- 'null'
- string
description: Unique request identifier
errors:
type: array
items:
type: object
properties:
status:
type: integer
description: HTTP status code
code:
type: string
description: Error code (e.g. ER0201)
message:
type: string
description: Human-readable error message
links:
type: object
properties:
about:
type: string
description: Link to error documentation
timestamp:
type: string
format: date-time
description: Error timestamp
example:
status: not_ok
request_id: req_abc123def456
errors:
- status: 401
code: ER0201
message: Invalid or missing API key.
links:
about: https://docs.apitube.io/platform/news-api/http-response-codes
timestamp: '2026-03-23T14:30:00Z'
'401':
description: Authentication error
content:
application/json:
schema:
description: Authentication error
type: object
properties:
status:
type: string
enum:
- not_ok
description: Response status
request_id:
type:
- 'null'
- string
description: Unique request identifier
errors:
type: array
items:
type: object
properties:
status:
type: integer
description: HTTP status code
code:
type: string
description: Error code (e.g. ER0201)
message:
type: string
description: Human-readable error message
links:
type: object
properties:
about:
type: string
description: Link to error documentation
timestamp:
type: string
format: date-time
description: Error timestamp
example:
status: not_ok
request_id: req_abc123def456
errors:
- status: 401
code: ER0201
message: Invalid or missing API key.
links:
about: https://docs.apitube.io/platform/news-api/http-response-codes
timestamp: '2026-03-23T14:30:00Z'
'402':
description: No points / balance on the account
content:
application/json:
schema:
description: No points / balance on the account
type: object
properties:
status:
type: string
enum:
- not_ok
description: Response status
request_id:
type:
- 'null'
- string
description: Unique request identifier
errors:
type: array
items:
type: object
properties:
status:
type: integer
description: HTTP status code
code:
type: string
description: Error code (e.g. ER0201)
message:
type: string
description: Human-readable error message
links:
type: object
properties:
about:
type: string
description: Link to error documentation
timestamp:
type: string
format: date-time
description: Error timestamp
example:
status: not_ok
request_id: req_abc123def456
errors:
- status: 401
code: ER0201
message: Invalid or missing API key.
links:
about: https://docs.apitube.io/platform/news-api/http-response-codes
timestamp: '2026-03-23T14:30:00Z'
'403':
description: Not available on the free plan, or API key lacks the fact_check scope
content:
application/json:
schema:
description: Not available on the free plan, or API key lacks the fact_check scope
type: object
properties:
status:
type: string
enum:
- not_ok
description: Response status
request_id:
type:
- 'null'
- string
description: Unique request identifier
errors:
type: array
items:
type: object
properties:
status:
type: integer
description: HTTP status code
code:
type: string
description: Error code (e.g. ER0201)
message:
type: string
description: Human-readable error message
links:
type: object
properties:
about:
type: string
description: Link to error documentation
timestamp:
type: string
format: date-time
description: Error timestamp
example:
status: not_ok
request_id: req_abc123def456
errors:
- status: 401
code: ER0201
message: Invalid or missing API key.
links:
about: https://docs.apitube.io/platform/news-api/http-response-codes
timestamp: '2026-03-23T14:30:00Z'
'404':
description: Article with the provided id was not found
content:
application/json:
schema:
description: Article with the provided id was not found
type: object
properties:
status:
type: string
enum:
- not_ok
description: Response status
request_id:
type:
- 'null'
- string
description: Unique request identifier
errors:
type: array
items:
type: object
properties:
status:
type: integer
description: HTTP status code
code:
type: string
description: Error code (e.g. ER0201)
message:
type: string
description: Human-readable error message
links:
type: object
properties:
about:
type: string
description: Link to error documentation
timestamp:
type: string
format: date-time
description: Error timestamp
example:
status: not_ok
request_id: req_abc123def456
errors:
- status: 401
code: ER0201
message: Invalid or missing API key.
links:
about: https://docs.apitube.io/platform/news-api/http-response-codes
timestamp: '2026-03-23T14:30:00Z'
'429':
description: Rate limit exceeded
content:
application/json:
schema:
description: Rate limit exceeded
type: object
properties:
status:
type: string
enum:
- not_ok
description: Response status
request_id:
type:
- 'null'
- string
description: Unique request identifier
errors:
type: array
items:
type: object
properties:
status:
type: integer
description: HTTP status code
code:
type: string
description: Error code (e.g. ER0201)
message:
type: string
description: Human-readable error message
links:
type: object
properties:
about:
type: string
description: Link to error documentation
timestamp:
type: string
format: date-time
description: Error timestamp
example:
status: not_ok
request_id: req_abc123def456
errors:
- status: 401
code: ER0201
message: Invalid or missing API key.
links:
about: https://docs.apitube.io/platform/news-api/http-response-codes
timestamp: '2026-03-23T14:30:00Z'
'502':
description: Fact-check upstream temporarily unavailable
content:
application/json:
schema:
description: Fact-check upstream temporarily unavailable
type: object
properties:
status:
type: string
enum:
- not_ok
description: Response status
request_id:
type:
- 'null'
- string
description: Unique request identifier
errors:
type: array
items:
type: object
properties:
status:
type: integer
description: HTTP status code
code:
type: string
description: Error code (e.g. ER0201)
message:
type: string
description: Human-readable error message
links:
type: object
properties:
about:
type: string
description: Link to error documentation
timestamp:
type: string
format: date-time
description: Error timestamp
example:
status: not_ok
request_id: req_abc123def456
errors:
- status: 401
code: ER0201
message: Invalid or missing API key.
links:
about: https://docs.apitube.io/platform/news-api/http-response-codes
timestamp: '2026-03-23T14:30:00Z'
components:
securitySchemes:
ApiKeyHeader:
type: apiKey
in: header
name: X-API-Key
description: API key passed via X-API-Key header
ApiKeyQuery:
type: apiKey
in: query
name: api_key
description: API key passed as query parameter
externalDocs:
description: APITube News API Documentation
url: https://docs.apitube.io