# Word Pattern Matcher

> Word Pattern Matcher is a paid API for AI agents from word-tools.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).

Finds English words matching a wildcard pattern where ? replaces one letter and * replaces any sequence of letters, useful for crosswords, Wordle, and word puzzles.

## Facts

- Endpoint: GET https://word-tools.x402tookit.com/word-pattern?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/word-pattern-matcher-2a983eea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zH1UYtcc77js0wsvzj3kH

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 word-pattern-matcher-2a983eea
```

Example prompt: I'm stuck on a crossword — I need a 5-letter word where the first letter is t, third letter is a, and last letter is k. Can you find words matching the pattern t?a?k?

## When to prefer this

Use this endpoint when you need to find real English words that conform to a specific positional letter pattern, such as crossword or Wordle solving. Prefer this over a reverse dictionary or completion endpoint when you have fixed letter positions and unknown gaps, rather than a known prefix or a meaning-based query.

## Known failure modes

- Invalid pattern syntax (missing letters or unsupported characters) returns no results or an error
- Pattern that matches no words returns an empty results array with count 0
- Limit parameter out of range (below 1 or above 50) may be clamped or rejected
- Very broad patterns like * alone may return too many matches or be rejected
- Service degradation flag may be set if the word database is partially unavailable

## How this service works

Find words matching a crossword or Wordle pattern: t??k finds task, trek; ? is one letter, * any letters.

## Output

Returns a list of matching words sorted by frequency score, each with a word string, a relevance/frequency score, and a frequency-per-million value. Also includes the matched pattern, total count of results, data source attribution, and optional summary or disclaimer fields.

## 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": [
      "pattern"
     ],
     "properties": {
      "limit": {
       "type": "integer",
       "description": "Results 1 to 50 (default 20)"
      },
      "pattern": {
       "type": "string",
       "description": "Letters with ? for one unknown and * for any run, e.g. t??k or ?ea*r"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "count": {
       "type": [
        "null",
        "number"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "pattern": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "results": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "object",
        "properties": {
         "word": {
          "type": [
           "null",
           "string"
          ]
         },
         "score": {
          "type": [
           "null",
           "number"
          ]
         },
         "frequencyPerMillion": {
          "type": [
           "null",
           "number"
          ]
         }
        }
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "sourceUrl": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
   
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/word-pattern-matcher-2a983eea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from word-tools.x402tookit.com](https://www.zero.xyz/host/word-tools.x402tookit.com/llms.txt)