# Wiktionary Word Definition Lookup

> Wiktionary Word Definition Lookup is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Fetches word definitions, parts of speech, and example sentences from Wiktionary, filtered by language

## Facts

- Endpoint: GET https://api.x402node.dev/knowledge/wiktionary
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-x402node-dev-c028f015
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p-SExQ_p80g-zh45WXicl

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 api-x402node-dev-c028f015
```

Example prompt: What does the word 'ephemeral' mean? Give me its part of speech and an example sentence — look it up in English from Wiktionary.

## When to prefer this

Use this endpoint when you need structured dictionary-style definitions, parts of speech, and usage examples from Wiktionary for a specific word — especially when language-specific lookup is needed. Prefer this over general web search when you want clean, structured lexicographic data rather than raw HTML or search snippets.

## Known failure modes

- Word not found in Wiktionary — returns empty or null definitions
- Language code not recognized — may fall back to all languages or return error
- Wiktionary page exists but lacks structured POS/example data for the word
- Rate limit or payment failure for the $0.005 USDC x402 call
- Ambiguous word with multiple entries may return incomplete coverage

## How this service works

Get word definitions, parts of speech, and examples from Wiktionary. Returns per-language definitions with POS labels and example sentences. Use ?word=ephemeral plus optional and lang=en. Built for AI agents handling vocabulary, etymology, and translation context.

## Output

Returns a structured object with per-language definitions, part-of-speech (POS) labels, and example sentences for the queried word, sourced from Wiktionary.

## 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",
     "required": [
      "word"
     ],
     "properties": {
      "lang": {
       "type": "string",
       "description": "Lang (optional)"
      },
      "word": {
       "type": "string",
       "description": "Word (required)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-x402node-dev-c028f015/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)