GridSmith Puzzle Maker
REMOTE · PUZZLE-MAKER.ZOVO.ONE
Crossword, word search, sudoku
Available components
Last scanned (3 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 969 tokens (~242/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://puzzle-maker.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 | 56f3033e6e2a1cde13c493ce64172fda |
| SANs: zovo.one, puzzle-maker.zovo.one, *.puzzle-maker.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 puzzle-maker.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://puzzle-maker.zovo.one/mcp | Verified | 200 | |
| http (plaintext) | http://puzzle-maker.zovo.one/mcp | HTTPS enforced | 301 | https://puzzle-maker.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 →
generate_crossword Create crossword puzzle ~262
Use this when the user wants a crossword puzzle (crossword maker, crossword puzzle maker, crossword for a class or a vocabulary list) built from answers and clues. Builds a valid interlocking grid with standard numbering and Across/Down clue lists, reports any answers that could not be placed, shows a playable crossword, and returns a printable PDF with an answer key. Needs 4-40 answer-and-clue pairs; if the user gives only words, write a short clue for each first. Answers are reduced to letters A-Z. Does not solve existing crosswords or answer single clues, and does not make symmetric newspaper-style grids.
| Name | Type | Req | Description |
|---|---|---|---|
| entries | array | yes | 4 to 40 answer-and-clue pairs. Example: [{"answer":"oxygen","clue":"Gas released by plants"}, ...] |
| paper | string | – | Paper size for the printable PDF: letter (US, default) or a4. Example: a4 |
| seed | integer | – | Optional layout seed (1-999999). The same inputs and seed always give the same puzzle; pass a different seed for a new layout. Example: 2024 |
| title | string | – | Title printed on the puzzle and PDF. Example: "Week 5 Science Vocabulary" |
| Name | Type | Req | Description |
|---|---|---|---|
| across | array | yes | – |
| cols | number | yes | – |
| crossings | number | yes | – |
| down | array | yes | – |
| downloads | object | yes | – |
| grid | array | yes | – |
| kind | string | yes | – |
| paper | string | yes | – |
| pdf_note | string | – | – |
| placed | number | yes | – |
| rows | number | yes | – |
| seed | number | yes | – |
| title | string | yes | – |
| total | number | yes | – |
| unplaced | array | yes | – |
No examples provided.
generate_sudoku Create sudoku ~260
Use this when the user wants a new sudoku puzzle to play or print (sudoku generator, printable sudoku with answers, easy sudoku for kids, hard sudoku). Generates a classic 9x9 sudoku at easy, medium or hard difficulty, checked by a solver for a single solution, playable in the chat with pencil notes, plus a printable PDF with the answer key. Does not solve a sudoku the user already has, explain solving strategies, or make 4x4, 6x6 or variant sudoku.
| Name | Type | Req | Description |
|---|---|---|---|
| difficulty | string | – | easy (37-38 givens, solvable with simple elimination), medium (30-32 givens, still solvable with singles), hard (24-30 givens, checked to require a technique beyond singles). Default medium. Example:… |
| paper | string | – | Paper size for the printable PDF: letter (US, default) or a4. Example: a4 |
| seed | integer | – | Optional layout seed (1-999999). The same inputs and seed always give the same puzzle; pass a different seed for a new layout. Example: 2024 |
| title | string | – | Title printed on the puzzle and PDF. Example: "Friday Brain Teaser" |
| Name | Type | Req | Description |
|---|---|---|---|
| difficulty | string | yes | – |
| downloads | object | yes | – |
| givens | number | yes | – |
| kind | string | yes | – |
| paper | string | yes | – |
| pdf_note | string | – | – |
| puzzle | string | yes | – |
| seed | number | yes | – |
| solution | string | yes | – |
| technique | string | yes | – |
| title | string | yes | – |
| unique | boolean | yes | – |
No examples provided.
generate_word_search Create word search ~336
Use this when the user wants a word search puzzle (word find, word search maker, printable word search for kids or a class) from a list of words. Accepts 5-40 words for a letter grid: right and down for easy, adding diagonals for medium, all 8 directions including backwards for hard; checks placed words for duplicate occurrences and reports words left out. Shows a playable puzzle and returns a printable PDF with an answer key. Not for crosswords (use generate_crossword) and does not find words in a grid the user already has.
| Name | Type | Req | Description |
|---|---|---|---|
| difficulty | string | – | easy = words run right and down; medium (default) = adds diagonals; hard = all 8 directions including backwards. Example: easy |
| paper | string | – | Paper size for the printable PDF: letter (US, default) or a4. Example: a4 |
| seed | integer | – | Optional layout seed (1-999999). The same inputs and seed always give the same puzzle; pass a different seed for a new layout. Example: 2024 |
| size | integer | – | Grid width and height in letters (8-25). Leave out to size the grid automatically from the words. Example: 15 |
| title | string | – | Title printed on the puzzle and PDF. Example: "Ocean Animals Word Search" |
| words | array | yes | 5 to 40 words to hide. Accents, spaces and punctuation are removed ("sea horse" -> SEAHORSE). Example: ["dolphin","octopus","shark","coral","whale"] |
| Name | Type | Req | Description |
|---|---|---|---|
| difficulty | string | yes | – |
| directions | array | yes | – |
| downloads | object | yes | – |
| grid | array | yes | – |
| kind | string | yes | – |
| notes | array | yes | – |
| paper | string | yes | – |
| pdf_note | string | – | – |
| seed | number | yes | – |
| size | number | yes | – |
| title | string | yes | – |
| unplaced | array | yes | – |
| words | array | yes | – |
No examples provided.
How do I install the GridSmith Puzzle Maker MCP server?
GridSmith Puzzle Maker is a hosted endpoint at https://puzzle-maker.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 · puzzle-maker.zovo.one
claude mcp add --transport http theluckystrike-puzzle-maker 'https://puzzle-maker.zovo.one/mcp'
What is the GridSmith Puzzle Maker MCP server?
GridSmith Puzzle Maker is an MCP server listed in the public MCP registry as io.github.theluckystrike/puzzle-maker. Crossword, word search, sudoku. This page covers its hosted endpoint (https://puzzle-maker.zovo.one/mcp).
Is the GridSmith Puzzle Maker MCP server safe to use?
GridSmith Puzzle Maker 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 GridSmith Puzzle Maker MCP server expose?
GridSmith Puzzle Maker exposes 3 tools: generate_crossword, generate_word_search, generate_sudoku. Their descriptions and schemas cost roughly 858 tokens of context every time the server is loaded.
Does the GridSmith Puzzle Maker MCP server require authentication?
No. We connected to GridSmith Puzzle Maker without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the GridSmith Puzzle Maker MCP server still maintained?
GridSmith Puzzle Maker 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.