PuzzleTide
NPM · PUZZLETIDE-MCP · SCANNED SEP 20
Word search, crossword, and sudoku generators, printable PDF worksheets, and verifiable LLM evals.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 34 of 103 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 65 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability72
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 2084 tokens (~138/item across 15 items; 15 tools + 0 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 Management90
- Stability observed for 27 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
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "eval_check" implies "eval" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 16 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
How do I install the PuzzleTide MCP server?
PuzzleTide runs locally as an npm package, launched with npx -y puzzletide-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · puzzletide-mcp
claude mcp add catorch-puzzletide -- npx -y puzzletide-mcp
{
"mcpServers": {
"catorch-puzzletide": {
"command": "npx",
"args": [
"-y",
"puzzletide-mcp"
]
}
}
} {
"servers": {
"catorch-puzzletide": {
"command": "npx",
"args": [
"-y",
"puzzletide-mcp"
]
}
}
} codex mcp add catorch-puzzletide -- npx -y puzzletide-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"catorch-puzzletide": {
"type": "local",
"command": [
"npx",
"-y",
"puzzletide-mcp"
],
"enabled": true
}
}
} openclaw mcp add catorch-puzzletide --command npx --arg -y --arg puzzletide-mcp
mcp_servers:
catorch-puzzletide:
command: "npx"
args: ["-y", "puzzletide-mcp"] {
"McpServers": {
"catorch-puzzletide": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"puzzletide-mcp"
]
}
}
} assistant mcp add catorch-puzzletide -t stdio -c npx -a -y puzzletide-mcp
{
"mcpServers": {
"catorch-puzzletide": {
"command": "npx",
"args": [
"-y",
"puzzletide-mcp"
]
}
}
} 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.
- 19 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Sept 26 −3
- Stability: pass → 0.80 functional
- 16 Sept 26 +1
- Stability: 0.97 → pass security
- 14 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 12 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 10 Sept 26 −3
- Stability: pass → 0.80 functional
- 9 Sept 26 +1
- Stability: 0.97 → pass security
- 8 Sept 26 0
- Security disclosure: unverified → fail ▼ functional
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 20 Sept 2026 · Analysed npm/puzzletide-mcp@0.2.1
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 103 packages
| Packages resolved | 103 |
|---|---|
| Stale | 34 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
eval_check eval check ~98
Grades a JSON answers file against a tasks file produced by eval generate. Verification is by construction: sudoku answers must satisfy sudoku rules and preserve the givens; word search answers must spell the word along a straight line in the grid. Outputs per-task results and a score summary.
| Name | Type | Req | Description |
|---|---|---|---|
| answers | string|number | – | JSON array of {id, answer} (required) |
| tasks | string|number | – | Tasks JSON from eval generate (required) |
No output schema declared.
No examples provided.
eval_generate eval generate ~183
Emits a JSON array of puzzle tasks with objectively checkable answers. Types: sudoku (unique-solution puzzles; answers verified against sudoku rules + givens) and wordsearch (answers verified against the grid letters). Deterministic with --seed, so a (seed, type, difficulty, n) tuple names a reproducible benchmark set.
| Name | Type | Req | Description |
|---|---|---|---|
| difficulty | string|number | – | sudoku: easy|medium|hard|expert; wordsearch: easy|medium|hard (default: medium) |
| n | string|number | – | Number of tasks (default: 10) |
| out | string|number | – | Write tasks JSON to a file instead of stdout |
| seed | string|number | – | Seed for a reproducible task set (default: 1) |
| type | string|number | – | Task type: sudoku or wordsearch (default: sudoku) |
No output schema declared.
No examples provided.
play_daily play daily ~38
Prints a daily sudoku (medium difficulty) that is the same for everyone on the same UTC calendar day. Solve more puzzles at puzzletide.com.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
puzzle_crossword_generate crossword generate ~332
Builds an interlocking crossword grid with standard numbering. Words come from --words "WORD: clue; WORD2: clue2", --file (JSON [{word,clue}] or "WORD: clue" lines), or --theme (clues are auto-generated puzzle-style hints). Words that cannot interlock are reported as unplaced. Deterministic with --seed. Online version: https://puzzletide.com/crossword
| Name | Type | Req | Description |
|---|---|---|---|
| count | string|number | – | Number of words to use from the theme/file (default: 10) |
| file | string|number | – | JSON array of {word, clue} or "WORD: clue" lines |
| paper | string|number | – | PDF paper size: letter or a4 (default: letter) |
| string|number | – | Also write a printable PDF worksheet to <file> | |
| seed | string|number | – | Seed for reproducible output (number or word) |
| size | string|number | – | Working grid size before trimming (5-25) (default: 15) |
| solution | boolean | – | Print the solution instead of the puzzle |
| solutionPage | boolean | – | Omit the solution page from PDF output — set false to disable |
| svg | string|number | – | Also write an SVG image to <file> |
| theme | string|number | – | Use a bundled word bank theme (auto-generated clues) |
| title | string|number | – | Title used in SVG/PDF output |
| words | string|number | – | Semicolon-separated "WORD: clue" pairs |
No output schema declared.
No examples provided.
puzzle_sudoku_generate sudoku generate ~223
Generates a 9x9 sudoku at easy/medium/hard/expert difficulty. Every puzzle is verified to have exactly one solution. Deterministic with --seed. The canonical string format is 81 characters, row by row, "." for empty cells. Online version: https://puzzletide.com/sudoku
| Name | Type | Req | Description |
|---|---|---|---|
| difficulty | string|number | – | One of: easy, medium, hard, expert (default: medium) |
| paper | string|number | – | PDF paper size: letter or a4 (default: letter) |
| string|number | – | Also write a printable PDF worksheet to <file> | |
| seed | string|number | – | Seed for reproducible output (number or word) |
| solution | boolean | – | Print the solution instead of the puzzle |
| solutionPage | boolean | – | Omit the solution page from PDF output — set false to disable |
| svg | string|number | – | Also write an SVG image to <file> |
| title | string|number | – | Title used in SVG/PDF output |
No output schema declared.
No examples provided.
puzzle_sudoku_solve sudoku solve ~119
Solves a 9x9 sudoku via backtracking. Input: 81 characters row by row with 1-9 for givens and 0/./_ for empty cells (whitespace and separators are ignored), passed inline, via --file, or on stdin. Reports whether the solution is unique. Online version: https://puzzletide.com/sudoku
| Name | Type | Req | Description |
|---|---|---|---|
| file | string|number | – | Read the grid from a file |
| grid | string | – | 81-character puzzle string (or "-" for stdin) |
No output schema declared.
No examples provided.
puzzle_sudoku_validate sudoku validate ~97
Checks a 9x9 sudoku grid for well-formedness, conflicting givens, solvability, and whether the solution is unique (a proper sudoku has exactly one). Same input formats as sudoku solve. Online version: https://puzzletide.com/sudoku
| Name | Type | Req | Description |
|---|---|---|---|
| file | string|number | – | Read the grid from a file |
| grid | string | – | 81-character puzzle string (or "-" for stdin) |
No output schema declared.
No examples provided.
puzzle_wordsearch_generate wordsearch generate ~431
Places every word in a letter grid (8 possible directions, difficulty presets) and fills the rest with random letters. Deterministic with --seed. Words come from --words, --file (one per line), or --theme (bundled PuzzleTide word banks). Output: text grid, --json structured data, --svg image, or --pdf printable worksheet with solution page. Online version: https://puzzletide.com/word-search
| Name | Type | Req | Description |
|---|---|---|---|
| cols | string|number | – | Grid columns (overrides --size) |
| count | string|number | – | Number of words to use from the theme/file (default: 12) |
| difficulty | string|number | – | Direction preset: easy (E,S), medium (+diagonals), hard (all 8) (default: medium) |
| directions | string|number | – | Explicit directions (comma-separated from: N,NE,E,SE,S,SW,W,NW) |
| file | string|number | – | Read words from a file (one per line or comma-separated) |
| paper | string|number | – | PDF paper size: letter or a4 (default: letter) |
| string|number | – | Also write a printable PDF worksheet to <file> | |
| rows | string|number | – | Grid rows (overrides --size) |
| seed | string|number | – | Seed for reproducible output (number or word) |
| size | string|number | – | Square grid size (6-30); computed from words if omitted |
| solution | boolean | – | Print the solution instead of the puzzle |
| solutionPage | boolean | – | Omit the solution page from PDF output — set false to disable |
| svg | string|number | – | Also write an SVG image to <file> |
| theme | string|number | – | Use a bundled word bank theme (see: ptide words themes) |
| title | string|number | – | Title used in SVG/PDF output |
| words | string|number | – | Comma-separated words, e.g. "cat,dog,fish" |
No output schema declared.
No examples provided.
words_anagram words anagram ~52
Finds single-word anagrams of the given letters within the bundled word bank sample.
| Name | Type | Req | Description |
|---|---|---|---|
| letters | string | yes | Letters to rearrange |
| limit | string|number | – | Maximum results (default: 50) |
No output schema declared.
No examples provided.
words_categories words categories ~30
Lists the bundled PuzzleTide word bank categories (animals, geography, holidays, ...) with their theme counts.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
words_list words list ~114
Prints the words of one bundled theme, optionally filtered by length, shuffled by --seed, and limited by --count. Useful as input for generators or other tools.
| Name | Type | Req | Description |
|---|---|---|---|
| count | string|number | – | Maximum number of words |
| maxLength | string|number | – | Maximum word length |
| minLength | string|number | – | Minimum word length |
| seed | string|number | – | Shuffle deterministically before applying --count |
| theme | string | yes | Theme id, e.g. animals/ocean-animals |
No output schema declared.
No examples provided.
words_match words match ~78
Matches the bundled word bank sample against a pattern where "_" or "?" is any letter, e.g. "c_r_l" matches CORAL. Helpful when stuck on a crossword or word puzzle.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | string|number | – | Maximum results (default: 50) |
| pattern | string | yes | Pattern with _ or ? wildcards |
No output schema declared.
No examples provided.
words_random words random ~80
Picks a random word from the bundled word banks — the same pool the hangman game uses. Deterministic with --seed.
| Name | Type | Req | Description |
|---|---|---|---|
| minLength | string|number | – | Minimum word length (default: 4) |
| seed | string|number | – | Seed for reproducible output |
| theme | string|number | – | Restrict to one theme |
No output schema declared.
No examples provided.
words_stats words stats ~24
Prints the size of the bundled word bank: categories, themes, unique words.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
words_themes words themes ~101
Lists the bundled starter themes (30 generic word lists; the full curated collection is at puzzletide.com). Filter by --category or full-text --search. Theme ids look like "animals/ocean-animals".
| Name | Type | Req | Description |
|---|---|---|---|
| category | string|number | – | Only themes in this category |
| limit | string|number | – | Maximum results (default: 50) |
| search | string|number | – | Full-text search over id, title, and description |
No output schema declared.
No examples provided.
What is the PuzzleTide MCP server?
PuzzleTide is an MCP server listed in the public MCP registry as io.github.catorch/puzzletide. Word search, crossword, and sudoku generators, printable PDF worksheets, and verifiable LLM evals. This page covers its npm package (puzzletide-mcp).
Is the PuzzleTide MCP server safe to use?
PuzzleTide scores 80 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. 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 PuzzleTide MCP server expose?
PuzzleTide exposes 15 tools: eval_check, eval_generate, play_daily, puzzle_crossword_generate, puzzle_sudoku_generate, and 10 more. Their descriptions and schemas cost roughly 2,000 tokens of context every time the server is loaded.
Is the PuzzleTide MCP server still maintained?
PuzzleTide is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the PuzzleTide MCP server under?
PuzzleTide declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.