# WorldData402 Wikipedia Summary Lookup

> WorldData402 Wikipedia Summary Lookup is a paid API for AI agents from worlddata402.worlddata402.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).

Fetches a concise Wikipedia article summary for a given title in a specified language, paid per-call via x402 (USDC on Base mainnet).

## Facts

- Endpoint: POST https://worlddata402.worlddata402.workers.dev/v1/wiki/summary/%7Blang%7D/%7Btitle%7D?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/worlddata402-wikipedia-summary-lookup-7d50bc9b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-E-NzX7NEcmFmL2X3w6ji

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 worlddata402-wikipedia-summary-lookup-7d50bc9b -d '<json body>'
```

Example prompt: Can you pull the Wikipedia summary for 'European Central Bank' in English so I have a quick factual overview of what it is and does?

## When to prefer this

Choose this endpoint when you need a quick, structured Wikipedia summary for a known entity (person, place, organization, concept) in a specific language, especially within an agent pipeline that uses x402 micropayments on Base mainnet. Prefer it over raw Wikipedia scraping when you want a clean, pay-per-use API abstraction without managing Wikipedia API credentials.

## Known failure modes

- Article title not found in the specified language — returns a 404 or empty result
- Ambiguous title resolves to a disambiguation page — may return unhelpful summary
- Language code unsupported or malformed — returns an error
- Payment failure via x402 — call not executed, USDC payment rejected or insufficient balance
- Rate limiting or upstream Wikimedia API downtime — service temporarily unavailable

## How this service works

Global market, government and reference data for AI agents. Pay-per-call over x402 (USDC on Base mainnet).

## Output

Returns a concise summary of the specified Wikipedia article including the article's plain-text extract, page title, description, and associated metadata such as language and page ID, as sourced from the Wikimedia REST API.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/worlddata402-wikipedia-summary-lookup-7d50bc9b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from worlddata402.worlddata402.workers.dev](https://www.zero.xyz/host/worlddata402.worlddata402.workers.dev/llms.txt)