# Wiktionary Dictionary Entry Checker

> Wiktionary Dictionary Entry Checker 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).

Checks if a spelling is a valid English dictionary entry on Wiktionary, returning parts of speech, inflection flags, and proper noun status.

## Facts

- Endpoint: GET https://dictionary-wiktionary.x402tookit.com/word-exists?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/wiktionary-dictionary-entry-checker-2447486c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KI5SNXRqSwpaxwG5jd2ev

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 wiktionary-dictionary-entry-checker-2447486c
```

Example prompt: Can you check if 'serendipity' is a real English word in Wiktionary — I want to know its parts of speech and whether it's a proper noun or just an inflected form?

## When to prefer this

Choose this endpoint when you need a fast, authoritative check of whether a spelling is a legitimate English dictionary entry, especially when you also need metadata like parts of speech, proper noun status, or inflection flags. It is backed by Wiktionary, making it ideal for word games, spell checkers, NLP pipelines, and content moderation tools that need lexical validation without requiring full definition text.

## Known failure modes

- Word not found in Wiktionary returns isEnglishWord=false with an empty partsOfSpeech array
- Non-English words may appear in Wiktionary but flagged via alsoInOtherLanguages without English senses
- Inflected forms (e.g. 'ran') may return inflectedOrAlternativeFormOnly=true pointing to base form
- Degraded response if Wiktionary source is temporarily unavailable, indicated by degraded=true flag
- Gibberish strings return verdict of not found with reasons array explaining absence

## How this service works

Is a spelling an English dictionary entry on Wiktionary? Returns parts of speech and flags for inflections and proper nouns.

## Output

Returns a verdict on whether the spelling is an English Wiktionary entry, along with the word queried, list of parts of speech, boolean flags for isEnglishWord, properNounOnly, inflectedOrAlternativeFormOnly, and alsoInOtherLanguages, a sense count, a short summary, source URL, data freshness timestamp, and any degradation or disclaimer notices.

## 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": {
      "word": {
       "type": "string",
       "description": "Spelling to check, e.g. serendipity, mice, qzxqzx, Paris"
      }
     }
    }
   },
   "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"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "coverage": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "sourceUrl": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "senseCount": {
       "type": [
        "null",
        "number"
       ]
      },
      "sourcePage": {
       "type": [
        "null",
        "string"
       ]
      },
      "isEnglishWord": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "partsOfSpeech": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "properNounOnly": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "alsoInOtherLanguages": {
       "type": [
        "boolea
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wiktionary-dictionary-entry-checker-2447486c/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)