# LetterLab Word Solver (remote · word-solver.zovo.one)

Word game solver & unscrambler

- Trust score: 74/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-23

## Components

- remote · `word-solver.zovo.one`: 74/100 (this document), [markdown](https://verifymcp.io/servers/theluckystrike-word-solver/word-solver.md), [page](https://verifymcp.io/servers/theluckystrike-word-solver/word-solver)

## Channel facts

- Endpoint: `https://word-solver.zovo.one/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-23.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 75/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 897 tokens (~224/item across 4 items; 3 tools + 1 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 3/100
  - Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.
  - Supports UI / widget rendering.

## Install

### How do I install the LetterLab Word Solver MCP server?

LetterLab Word Solver is a hosted endpoint at https://word-solver.zovo.one/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http theluckystrike-word-solver 'https://word-solver.zovo.one/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "theluckystrike-word-solver": {
      "url": "https://word-solver.zovo.one/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "theluckystrike-word-solver": {
      "type": "http",
      "url": "https://word-solver.zovo.one/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.theluckystrike-word-solver]
url = "https://word-solver.zovo.one/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "theluckystrike-word-solver": {
      "type": "remote",
      "url": "https://word-solver.zovo.one/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add theluckystrike-word-solver --url 'https://word-solver.zovo.one/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  theluckystrike-word-solver:
    url: "https://word-solver.zovo.one/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "theluckystrike-word-solver": {
      "Transport": "http",
      "Url": "https://word-solver.zovo.one/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add theluckystrike-word-solver -t streamable-http -u 'https://word-solver.zovo.one/mcp'
```

### Other

```json
{
  "mcpServers": {
    "theluckystrike-word-solver": {
      "type": "http",
      "url": "https://word-solver.zovo.one/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-23 (score 74, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-22 (score 74)

First indexed and scored.

## MCP tools (3)

### `solve_anagram` (~328 tokens)

Unscramble letters

Use this when the user wants to unscramble letters or find all words that can be made from a set of letters (word unscrambler, anagram solver, letter-tile word finder), optionally with blank tiles (? or *) and filters for length, starts with, ends with, or contains. Returns dictionary matches grouped by length with counts (every match is counted; up to 25 words are listed per length) and tile points (standard letter values, no board bonuses). Does not check board placement or define words. Do not use for crossword patterns with known letter positions (use solve_word_pattern).

Input parameters:

- `contains` (string): Only words that contain this run of letters, e.g. QU.
- `ends_with` (string): Only words that end with these letters, e.g. ING.
- `length` (integer): Only words of exactly this many letters, e.g. 5.
- `letters` (string, required): The letters to unscramble, e.g. RETAINS. Use ? or * for each blank (wildcard) tile, e.g. QUIZ?ES. Spaces and case are ignored; 2-20 tiles, at most 3 blanks.
- `min_length` (integer): Shortest word length to include, e.g. 3 (default 2).
- `starts_with` (string): Only words that start with these letters, e.g. RE.
- `use_all_letters` (boolean): true to list only words that use every tile (full anagrams), e.g. true for 'what words use all of LISTEN'.

Output parameters:

- `blanks` (number)
- `common_total` (number)
- `filters` (object)
- `full_anagrams` (array)
- `groups` (array)
- `letters` (string)
- `mode` (string)
- `note` (string)
- `shown` (number)
- `top_scoring` (array)
- `total` (number)

### `solve_word_pattern` (~231 tokens)

Find words by pattern

Use this when the user needs words that fit a pattern of known and unknown letters, such as a crossword answer (C?T, _A_E, 7 letters ending in ING), with optional letters that must or must not appear. Counts every matching dictionary word and lists up to 120 of them, common words first. Does not solve clues by meaning or look up definitions. Do not use for unscrambling a set of letters (use solve_anagram).

Input parameters:

- `exclude_letters` (string): Letters that must not appear anywhere, e.g. AEIO.
- `include_letters` (string): Letters that must appear somewhere (repeat a letter to require it twice), e.g. RS.
- `length` (integer): Word length when there is no pattern, or to check it, e.g. 7 for a 7-letter crossword answer.
- `pattern` (string): Known letters with ? (or _ or .) for each unknown letter and * for any run of letters, e.g. C?T, _A_E, ??ANGE, or S*ING. Spaces are ignored.

Output parameters:

- `by_length` (array)
- `common_total` (number)
- `filters` (object)
- `mode` (string)
- `more` (number)
- `note` (string)
- `pattern` (string)
- `total` (number)
- `words` (array)

### `solve_word_guess` (~230 tokens)

Narrow down a word guess

Use this when the user plays a 5-letter word guessing game with green/yellow/gray feedback and wants the remaining possible answers or a strong next guess (word game solver, guess helper). Takes previous guesses with their color feedback (G/Y/-), applies the standard repeated-letter rules, counts the words still possible and lists up to 60 of them, and ranks next guesses by expected information. Supports 4-8 letter variants and hard mode. Does not know today's answer and does not play the game. Do not use for unscrambling letters or crossword patterns.

Input parameters:

- `guesses` (array): Guesses made so far with their color feedback, in order, e.g. [{"word":"CRANE","feedback":"-Y--G"}]. Leave empty for a suggested opening guess.
- `hard_mode` (boolean): true if every next guess must use all revealed clues (hard mode); then only words that could still be the answer are suggested.
- `word_length` (integer): Letters in the hidden word, e.g. 5 (default: length of the guesses, else 5).

Output parameters:

- `best_guesses` (array)
- `candidates` (array)
- `clues` (object)
- `common_total` (number)
- `guesses` (array)
- `guesses_scored` (number)
- `mode` (string)
- `more` (number)
- `note` (string)
- `scored_against` (number)
- `solved` (boolean)
- `total` (number)
- `word_length` (number)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/theluckystrike-word-solver/word-solver#diagnostics

## Score history

- 2026-10-23: 74
- 2026-10-22: 74

## Common questions

### What is the LetterLab Word Solver MCP server?

LetterLab Word Solver is an MCP server listed in the public MCP registry as io.github.theluckystrike/word-solver. Word game solver & unscrambler. This page covers its hosted endpoint (https://word-solver.zovo.one/mcp).

### Is the LetterLab Word Solver MCP server safe to use?

LetterLab Word Solver scores 74 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the LetterLab Word Solver MCP server expose?

LetterLab Word Solver exposes 3 tools: solve_anagram, solve_word_pattern, solve_word_guess. Their descriptions and schemas cost roughly 789 tokens of context every time the server is loaded.

### Does the LetterLab Word Solver MCP server require authentication?

No. We connected to LetterLab Word Solver without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the LetterLab Word Solver MCP server still maintained?

LetterLab Word Solver is still listed as active in the MCP registry. We last reached this channel on 23 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://word-solver.zovo.one/mcp
- Website: https://word-solver.zovo.one/
- Changelog RSS feed: https://verifymcp.io/servers/theluckystrike-word-solver/word-solver.xml
- Changelog JSON feed: https://verifymcp.io/servers/theluckystrike-word-solver/word-solver.json
- HTML version of this page: https://verifymcp.io/servers/theluckystrike-word-solver/word-solver