LetterLab Word Solver
REMOTE · WORD-SOLVER.ZOVO.ONE
Word game solver & unscrambler
Available components
Last scanned (4 hours ago)
Scores higher than 66% of remote servers
Reachable. Last reached 23 Oct 2026.
Category Entertainment and Games
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. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability75
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management3
- Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
- Supports UI / widget rendering.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 23 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 22 Oct 26 74
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 23 Oct 2026 · Probed https://word-solver.zovo.one/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=zovo.one | CN=WE1,O=Google Trust Services,C=US | 2 Oct 2026 | 31 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 32e2b188f158e7ee0ef1166cee616ebb |
| SANs: zovo.one, word-solver.zovo.one, *.word-solver.zovo.one | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of word-solver.zovo.one. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| one. | present | 64939 | 8 | Verified |
| zovo.one. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=15552000; includeSubDomains; preload |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://word-solver.zovo.one/mcp | Verified | 200 | |
| http (plaintext) | http://word-solver.zovo.one/mcp | HTTPS enforced | 301 | https://word-solver.zovo.one/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
solve_anagram Unscramble letters ~328
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).
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | 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'. |
| Name | Type | Req | Description |
|---|---|---|---|
| blanks | number | yes | – |
| common_total | number | yes | – |
| filters | object | yes | – |
| full_anagrams | array | yes | – |
| groups | array | yes | – |
| letters | string | yes | – |
| mode | string | yes | – |
| note | string | yes | – |
| shown | number | yes | – |
| top_scoring | array | yes | – |
| total | number | yes | – |
No examples provided.
solve_word_guess Narrow down a word guess ~230
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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). |
| Name | Type | Req | Description |
|---|---|---|---|
| best_guesses | array | yes | – |
| candidates | array | yes | – |
| clues | object | yes | – |
| common_total | number | yes | – |
| guesses | array | yes | – |
| guesses_scored | number | yes | – |
| mode | string | yes | – |
| more | number | yes | – |
| note | string | yes | – |
| scored_against | number | yes | – |
| solved | boolean | yes | – |
| total | number | yes | – |
| word_length | number | yes | – |
No examples provided.
solve_word_pattern Find words by pattern ~231
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).
| Name | Type | Req | Description |
|---|---|---|---|
| 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. |
| Name | Type | Req | Description |
|---|---|---|---|
| by_length | array | yes | – |
| common_total | number | yes | – |
| filters | object | yes | – |
| mode | string | yes | – |
| more | number | yes | – |
| note | string | yes | – |
| pattern | string | yes | – |
| total | number | yes | – |
| words | array | yes | – |
No examples provided.
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.
remote · word-solver.zovo.one
claude mcp add --transport http theluckystrike-word-solver 'https://word-solver.zovo.one/mcp'
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.