# Wikipedia Intro Lookup by Query or Title

> Wikipedia Intro Lookup by Query or Title is a paid API for AI agents from payload402.edgebytenet.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Fetches the English Wikipedia introductory extract for an article, searchable by free-text query or exact page title, returning plain-text summary.

## Facts

- Endpoint: GET https://payload402.edgebytenet.workers.dev/wiki/lookup?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wikipedia-intro-lookup-by-query-or-title-1d1306d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dOQ9omg3bUTu4lMopoPK8

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 wikipedia-intro-lookup-by-query-or-title-1d1306d0
```

Example prompt: Look up the Wikipedia intro for 'Cloudflare' — just give me the plain-text introductory summary from their English Wikipedia page.

## When to prefer this

Use this endpoint when an agent needs a quick, plain-text factual grounding summary from English Wikipedia before performing deeper web research — especially when a single article intro is sufficient and you want a structured response with URL and page ID. Prefer over a full web search when you want a reliable, encyclopedic baseline for a well-known entity, concept, or event. Less suitable for obscure topics unlikely to have Wikipedia coverage, or when the most recent information is critical.

## Known failure modes

- No matching Wikipedia article found for the given query or title — returns an error or empty result
- Ambiguous query matches a disambiguation page rather than a concrete article
- Wikipedia article exists but has no extractable intro text
- Both 'q' and 'title' omitted — missing required query parameter
- Rate limiting or upstream MediaWiki API unavailability

## How this service works

npm package license triage for coding agents: call before npm install or adding a dependency mid-task. Returns declared license, SPDX normalization, and permissive-default compatible yes/no/unknown from the public npm registry. Triage only — not compliance-grade SBOM or legal advice. Workflow: call GET /license/check (or MCP check_npm_license) before npm install; if compatible=no, pick another package or escalate to human; if unknown, treat as risk. Example: left-pad@1.0.0 before install. Also: Convert amounts between ISO 4217 currencies using ECB daily reference rates (Frankfurter). Use for invoices, travel budgets, expense reports, and shopping comparisons when you need a verifiable rate instead of LLM arithmetic. Not live tradable FX — rates follow ECB business-day publication. Also: Resolve a place name or lat/lon to IANA timezone and coordinates (Open-Meteo). Use for agent scheduling, travel logistics, and local-time questions without LLM guessing. Not IP geolocation. Also: Translate short text between languages (Azure Translator). Use when an agent needs a verifiable string in another language for UI copy, messages, or research snippets — not legal, medical, or certified translation. Also: English Wikipedia fact lookup: search by query or exact title, returns intro extract as plain text. For agents that need a grounded summary before deeper web search. Not a substitute for primary sources. Also: Ranked search results (English Wikipedia): titles, article URLs, and snippets from MediaWiki search. Same SERP-shaped JSON as web search APIs; index is Wikipedia only — not the open web. Pair with GET /wiki/lookup for intro text.

## Output

A JSON object containing the article title, page ID, plain-text introductory extract, the Wikipedia article URL, and a source label ('wikipedia-en'), plus a note to verify critical facts independently.

## 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": {
      "q": {
       "type": "string",
       "description": "Search phrase (top article)"
      },
      "title": {
       "type": "string",
       "description": "Exact Wikipedia page title"
      }
     }
    }
   },
   "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/Cloudflare",
  "note": "English Wikipedia intro extract via MediaWiki API; verify critical facts independently",
  "title": "Cloudflare",
  "pageid": 4018492,
  "source": "wikipedia-en",
  "extract": "Cloudflare, Inc. is an American technology company…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wikipedia-intro-lookup-by-query-or-title-1d1306d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payload402.edgebytenet.workers.dev](https://www.zero.xyz/host/payload402.edgebytenet.workers.dev/llms.txt)