# Dictionary and Etymology – Word Definitions (Wiktionary)

> Dictionary and Etymology – Word Definitions (Wiktionary) is a paid API for AI agents from dictionary-wiktionary.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).

Returns definitions of an English word grouped by part of speech with usage examples, sourced from Wiktionary

## Facts

- Endpoint: GET https://dictionary-wiktionary.x402tookit.com/define?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dictionary-and-etymology-word-definitions-wiktionary-284ae151
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_98q5j2AUO8RS9DGNtQlby

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 dictionary-and-etymology-word-definitions-wiktionary-284ae151
```

Example prompt: What does 'serendipity' mean? Give me up to 3 noun definitions from Wiktionary with usage examples.

## When to prefer this

Use this endpoint when you need structured, part-of-speech-grouped definitions with usage examples for English words, especially when you want Wiktionary's open, comprehensive coverage including technical, archaic, or multi-sense words. Prefer this over general LLM-generated definitions when you need a citable, Wiktionary-sourced answer with sub-senses and real usage examples. It is better than etymology-focused endpoints when definitions are the primary need, and better than spelling-check endpoints when sense content (not just validity) is required.

## Known failure modes

- Word not found in Wiktionary – returns empty entries or a verdict indicating no coverage
- Non-English words rejected – endpoint only supports English words
- Invalid part-of-speech filter yields no results if that POS doesn't exist for the word
- Limit parameter outside 1–10 range may be ignored or cause an error
- Network or upstream Wiktionary outage returns degraded flag or empty response
- Very obscure or newly coined words may have incomplete Wiktionary entries

## How this service works

Definitions of an English word by part of speech with usage examples (Wiktionary). English words only.

## Output

A structured response containing the queried word, its source (Wiktionary), a list of entries each with a part-of-speech label and an array of definitions (each with definition text, usage examples, and optional sub-senses), total definition count, source URL, license info, and an optional summary string.

## 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": {
      "pos": {
       "type": "string",
       "description": "Only this part of speech, e.g. noun, verb, adjective"
      },
      "word": {
       "type": "string",
       "description": "English word or short phrase, e.g. serendipity, run, ice cream"
      },
      "limit": {
       "type": "integer",
       "description": "Definitions per part of speech, 1 to 10 (default 4)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "word": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "entries": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "object",
        "properties": {
         "definitions": {
          "type": [
           "array",
           "null"
          ],
          "items": {
           "type": "object",
           "properties": {
            "text": {
             "type": [
              "null",
              "string"
             ]
            },
            "examples": {
             "type": [
              "array",
              "null"
             ],
             "items": {}
            },
            "subSenses": {
             "type": [
              "array",
              "null"
             ]
            }
           }
          }
         },
         "partOfSpeech": {
          "type": [
           "null",
           "string"
          ]
         },
         "totalDefinitions": {
          "type": [
           "null",
           "number"
          ]
         }
        }
       }
      },
      "license": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
      
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dictionary-and-etymology-word-definitions-wiktionary-284ae151/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dictionary-wiktionary.x402tookit.com](https://www.zero.xyz/host/dictionary-wiktionary.x402tookit.com/llms.txt)