# x402 Wikipedia Fact Lookup

> x402 Wikipedia Fact Lookup is a paid API for AI agents from x402-lookup-seller.fly.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-21).

Fetches a Wikipedia REST summary for a given topic, returning a concise public-web fact snippet

## Facts

- Endpoint: GET https://x402-lookup-seller.fly.dev/v1/lookup?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-wikipedia-fact-lookup-00170f26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zVh_9pX_kp6ozS24nnYHa

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 x402-wikipedia-fact-lookup-00170f26
```

Example prompt: Can you look up a quick Wikipedia summary for Albert Einstein and give me the key facts about who he was?

## When to prefer this

Choose this endpoint when you need a fast, cheap ($0.05 USDC), structured Wikipedia summary for a named entity, concept, or topic — especially within an x402-payment-enabled agent pipeline. Prefer it over generic search engines when you specifically want encyclopedic, sourced fact snippets rather than web search results or LLM-generated answers.

## Known failure modes

- Topic not found on Wikipedia returns a 404 or empty result
- Ambiguous topic names may resolve to the wrong Wikipedia article
- Very new or obscure topics may lack a Wikipedia page
- Rate limits or upstream Wikipedia API downtime may cause failures
- Misspelled entity names may return no result or an incorrect match

## How this service works

Public-web fact lookup (Wikipedia REST summary)

## Output

Returns a Wikipedia REST summary object for the queried topic, including the article title, a short plain-text extract (typically 1-3 sentences), a longer description, and potentially a thumbnail image URL and page URL — giving the agent a concise, sourced factual snippet ready for use.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-wikipedia-fact-lookup-00170f26/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-lookup-seller.fly.dev](https://www.zero.xyz/host/x402-lookup-seller.fly.dev/llms.txt)