# AgentBit Wikipedia Knowledge Grounding

> AgentBit Wikipedia Knowledge Grounding is a paid API for AI agents from agentbit.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Search Wikipedia and retrieve the full summary, description, thumbnail, and canonical URL of the best-matching article in any of 300+ language editions in a single call.

## Facts

- Endpoint: POST https://agentbit.app/v1/knowledge/wiki
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentbit-wikipedia-knowledge-grounding-b4795b10
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H7RSgQ8kForIOwyLQp2V9

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 agentbit-wikipedia-knowledge-grounding-b4795b10 -d '<json body>'
```

Example prompt: Look up 'Ethereum' on Wikipedia in English and give me the summary, short description, thumbnail, and canonical article URL so I can ground the entity before analyzing it.

## When to prefer this

Choose this endpoint when an agent needs fast, cheap encyclopedic grounding for a named entity — a person, place, concept, or technology — before reasoning about it, especially when you want multilingual coverage or need the canonical URL, thumbnail, and attribution in a single round-trip. It is cheaper and more structured than a general web search for entity lookups, and more reliable than scraping Wikipedia directly. Prefer it over generic search endpoints when the subject is well-known enough to have a Wikipedia article and you need structured metadata (description, thumbnail, last-modified) rather than open-web results.

## Known failure modes

- No Wikipedia article found for the query — returns an empty matches array and no top_summary
- Query string too short or too long (outside 2-300 characters) — validation error
- Unsupported or malformed language code — may fall back to English or return an error
- Limit value outside 1-10 range — validation error
- Wikimedia API upstream timeout — HTTP 502 or 504 response
- Rate limit exceeded — HTTP 429 response

## How this service works

Encyclopedic grounding in one call: Wikipedia search plus the full summary of the best match — extract, short description, canonical URL, thumbnail — in any of 300+ language editions. Official Wikimedia REST APIs, CC BY-SA attribution included. The cheapest way for an agent to ground an entity before reasoning about it.

## Output

A JSON object containing the query, language edition, a list of matching article titles with keys and URLs, the top match's full plain-text extract, short description, thumbnail URL, canonical Wikipedia URL, last-modified timestamp, and a CC BY-SA attribution string ready to include when republishing.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "lang": {
   "type": "string",
   "description": "Wikipedia language edition (default en)"
  },
  "limit": {
   "type": "integer",
   "description": "Max search matches (1-10, default 5)"
  },
  "query": {
   "type": "string",
   "description": "Entity or topic to look up (2-300 chars)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "lang": "en",
  "query": "EIP-3009",
  "matches": [
   {
    "key": "Ethereum",
    "url": "https://en.wikipedia.org/wiki/Ethereum",
    "title": "Ethereum",
    "description": "Decentralized blockchain platform"
   }
  ],
  "attribution": "Content from Wikipedia (en.wikipedia.org), licensed CC BY-SA 4.0 — attribute when republishing.",
  "match_count": 2,
  "top_summary": {
   "url": "https://en.wikipedia.org/wiki/Ethereum",
   "type": "standard",
   "title": "Ethereum",
   "extract": "Ethereum is a decentralized blockchain...",
   "thumbnail": "https://upload.wikimedia.org/example.png",
   "description": "Decentralized blockchain platform",
   "last_modified": "2026-08-30T10:00:00Z"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentbit-wikipedia-knowledge-grounding-b4795b10/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentbit.app](https://www.zero.xyz/host/agentbit.app/llms.txt)