# Free Dictionary Word Definition Lookup

> Free Dictionary Word Definition Lookup is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-16).

Returns part-of-speech-grouped definitions, usage examples, per-sense synonyms, IPA phonetics, and pronunciation audio URL for a given English word via the Free Dictionary API

## Facts

- Endpoint: POST https://x402-deployer.x402-deployer.workers.dev/dictionary-define
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-deployer-x402-deployer-workers-dev-43d2b8a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9mUPfOdlKUhz3OIGX93Ag

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 x402-deployer-x402-deployer-workers-dev-43d2b8a7 -d '<json body>'
```

Example prompt: What's the full dictionary definition of 'ephemeral' — including its part of speech, IPA pronunciation, a usage example, and any synonyms?

## When to prefer this

Choose this endpoint when you need structured English dictionary data including IPA pronunciation, audio, and grouped definitions with examples and synonyms — ideal for vocabulary tools, language learning apps, or any agent needing authoritative word definitions with phonetics. Prefer over thesaurus-only endpoints when you need full definitions rather than just synonyms or related words.

## Known failure modes

- Word not found in Free Dictionary API — returns 404 or empty result
- Word is misspelled or non-English — no definitions returned
- Audio URL unavailable for some less common words
- Rate limits or upstream API downtime causing request failure
- Ambiguous or very archaic words may have incomplete entries

## How this service works

English dictionary / word definition / lookup word / pronunciation / part of speech / synonyms / etymology adjacent. Returns part-of-speech-grouped definitions with usage examples and per-sense synonyms, plus IPA phonetic and a pronunciation audio URL when available. Wraps the public Free Dictionary API — no auth, commercial-OK.

## Output

Returns a structured response grouped by part of speech, with one or more definitions per sense, usage example sentences, per-sense synonyms, IPA phonetic string, and a URL to a pronunciation audio file when available.

## Example request

```json
{
 "word": "ephemeral"
}
```

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "word"
     ],
     "properties": {
      "word": {
       "type": "string",
       "description": "English word to define (case-insensitive). Single token, no whitespace required for compound words."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "word": {
       "type": "string"
      },
      "source": {
       "type": "string"
      },
      "meanings": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "definitions": {
          "type": "array",
          "items": {
           "type": "object",
           "properties": {
            "example": {
             "type": "string"
            },
            "synonyms": {
             "type": "array",
             "items": {
              "type": "string"
             }
            },
            "definition": {
             "type": "string"
            }
           }
          }
         },
         "part_of_speech": {
          "type": "string"
         }
        }
       }
      },
      "phonetic": {
       "type": "string"
      },
      "pronunciation_audio_url": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

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- [Other services from x402-deployer.x402-deployer.workers.dev](https://www.zero.xyz/host/x402-deployer.x402-deployer.workers.dev/llms.txt)