# Wikipedia Article Summary API

> Wikipedia Article Summary API is a paid API for AI agents from x402.onchainexpat.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Fetches a concise summary of a Wikipedia article given a topic or article title

## Facts

- Endpoint: POST https://x402.onchainexpat.com/api/x402-tools/wiki/summary
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-onchainexpat-com-aee61173
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xkGkICPnSvu4PM1QBP1k5

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-onchainexpat-com-aee61173 -d '<json body>'
```

Example prompt: Can you pull up the Wikipedia summary for 'Nikola Tesla' so I can get a quick overview of who he was?

## When to prefer this

Use this endpoint when an agent needs a quick, factual, encyclopedic summary of a well-known topic, person, place, or concept. It is ideal when you want structured Wikipedia content without scraping the full page, and when a concise introduction-level overview is sufficient rather than a full article.

## Known failure modes

- Article not found — ambiguous or misspelled topic title returns an error or empty result
- Disambiguation page — topic resolves to multiple articles with no single clear match
- Wikipedia API unavailable — upstream service error returns a failure response
- Payment failure — insufficient USDC balance prevents the call from completing

## How this service works

Pay-per-request AI, crypto, proxy, and utility APIs using x402 protocol

## Output

A concise text summary of the requested Wikipedia article, drawn from the article's introduction or abstract, providing key facts and a brief description of the topic.

## Example request

```json
{
 "title": "Artificial Intelligence"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "title"
 ],
 "properties": {
  "title": {
   "type": "string",
   "description": "Article title to summarize. Alias: 'topic'"
  },
  "language": {
   "type": "string",
   "description": "Wikipedia language code (default 'en')"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string"
  },
  "title": {
   "type": "string"
  },
  "cached": {
   "type": "boolean"
  },
  "extract": {
   "type": "string"
  },
  "thumbnail": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-onchainexpat-com-aee61173/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.onchainexpat.com](https://www.zero.xyz/host/x402.onchainexpat.com/llms.txt)