# Engedi Fact-Check API

> Engedi Fact-Check API is a paid API for AI agents from engedi.digi-life17.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Verifies a given claim against trusted sources and returns a confidence score with source attribution

## Facts

- Endpoint: GET https://engedi.digi-life17.workers.dev/api/fact-check
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/engedi-fact-check-api-b9c17fd7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_J00kgDW7Qv9bH1rl5bV9o

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 engedi-fact-check-api-b9c17fd7
```

Example prompt: Can you fact-check this claim for me: 'The Great Wall of China is visible from space with the naked eye'? I want to know if it's true and how confident the source is.

## When to prefer this

Use this endpoint when you need to programmatically verify factual claims against trusted sources with a confidence score attached — especially useful in workflows that flag misinformation, validate user-submitted content, or fact-check statements before publishing. Prefer this over a generic web search when you need a structured confidence-scored result rather than raw search hits.

## Known failure modes

- Missing 'claim' query parameter returns an error
- Claim is ambiguous or too vague for verification, low confidence score returned
- External trusted sources unavailable, resulting in a failed or uncached response
- Very niche or obscure claims may yield low-confidence results with limited sourcing
- Rate limiting or payment failure results in 402 or 429 response

## How this service works

51 REST endpoints for AI agents. Weather, news, crypto, stocks, products, courses, real estate, and 42 more. Pay per call in USDC/USDT via x402.

## Output

Returns a data object with the verification result, a boolean success flag, a confidence score (0-1), the source used to verify the claim, whether the result was cached, and a last_updated timestamp indicating freshness of the source data.

## Response schema (JSON Schema)

```json
{}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/engedi-fact-check-api-b9c17fd7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from engedi.digi-life17.workers.dev](https://www.zero.xyz/host/engedi.digi-life17.workers.dev/llms.txt)