# Polyform Wikipedia Summary API

> Polyform Wikipedia Summary API is a paid API for AI agents from api.polyform.org, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-22).

Fetches a concise plain-text summary of a Wikipedia article for a given topic, paid per call via USDC micropayment

## Facts

- Endpoint: GET https://api.polyform.org/v1/wiki/summary?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polyform-wikipedia-summary-api-cd8c0728
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KqEOQHBwgbTCicSveGqMI

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 polyform-wikipedia-summary-api-cd8c0728
```

Example prompt: Can you pull the Wikipedia summary for Ethereum so I can get a quick plain-English overview of what it is?

## When to prefer this

Choose this endpoint when you need a lightweight, factual encyclopedic summary of a well-known topic without setting up an API key or subscription. Ideal for agents doing one-off or low-volume lookups where per-call micropayment pricing is more economical than a monthly plan. Prefer over raw Wikipedia API calls when you want a clean, normalized response with no setup overhead.

## Known failure modes

- Topic not found on Wikipedia — may return empty extract or 404-equivalent
- Ambiguous topic resolves to wrong Wikipedia article
- Wikipedia API temporarily unavailable — timeout or upstream error
- Payment failure via x402 — call not executed if micropayment is rejected

## How this service works

Pay-per-call data endpoints for AI agents. USDC on Base via x402. No account, no API key — one micropayment per call.

## Output

Returns a JSON object containing the canonical Wikipedia article URL, the article title, and a plain-text extract (introductory summary paragraph) for the requested topic.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://en.wikipedia.org/wiki/Ethereum",
  "title": "Ethereum",
  "extract": "Ethereum is a decentralized…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polyform-wikipedia-summary-api-cd8c0728/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.polyform.org](https://www.zero.xyz/host/api.polyform.org/llms.txt)