Overview
Pass a difficulty level of easy, medium, hard, or expert, or omit the parameter to default to medium. The API creates a 9x9 number grid containing the puzzle, marking unfilled spaces with zeros. Paid tiers also return the complete solution grid.
Live Test Sudoku Generator Skill Skill →
The tool
Once your client is connected to the VerveKit server, this appears in its tool list as SudokuGeneratorSkill. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.
{
"name": "SudokuGeneratorSkill",
"arguments": {}
}Connecting
One server URL covers every skill in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.
{
"mcpServers": {
"vervekit": {
"url": "https://api.vervekit.com/v1/mcp"
}
}
}https://api.vervekit.com/v1/mcpPer-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.
Arguments
These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.
| Argument | Type | Description |
|---|---|---|
difficultyOptional | string | The difficulty level of the Sudoku puzzle to generateeasymediumhardexpertdefault medium |
What the model gets back
The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.
{
"status": "ok",
"error": null,
"data": {
"puzzle": {
"grid": "674--3---1---72-9-5----1--4------8-3-1---8--52----61--7-1----8--53-97--19--8-4---",
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"image": {
"imageName": "d1b59df4-7ab2-474e-b269-e34ce212b469_puzzle.png",
"format": ".png",
"downloadURL": "https://storage.googleapis.com/apiverve/APIData/sudoku/d1b59df4-7ab2-474e-b269-e34ce212b469_puzzle.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010586&Signature=jFaR0KjqZtGbKvnH7wPVVfz88z4mRT9bgs54W%2BEyU%2B%2B4%2BbXZdqK8wafALwJpk89vRjhsTpaX6huE8SDkDl6U6VY452LDEnv1kOT6SASgttUbUVnnfoyJFfaEQIreHun6Y0dCAIA8RpJ27kBGorHAN9cgvA3N4wLTrzKGXd%2B3ULxbYivUNIjxgXFqeOCNeHhYHOU46i6voYYC7VYaibkpqwwD%2BYw0jQOXzVevwEVmP%2BhfQ0B1mToPnsyzS8Bo2b8Vtyh78YLh3u30KPKoio1%2FbNZ1KYI6hUpZ9UlnQFAN91Wg%2BFVlG4clYhGgwcPsjsq5xUUsdty4JmYYVocturuXrQ%3D%3D",
"expires": 1766010586784
}
},
"solution": {
"grid": "674953218138472596592681734465129873319748625287536149741365982853297461926814357",
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"image": {
"imageName": "d0a6a5a0-c0e3-44cb-8417-e6590f793a7c_solution.png",
"format": ".png",
"downloadURL": "https://storage.googleapis.com/apiverve/APIData/sudoku/d0a6a5a0-c0e3-44cb-8417-e6590f793a7c_solution.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010586&Signature=LVChpKLTdpScYP%2F%2FmDSgy9wp%2FECkftQIjWK%2FRZ8dtUjv%2BchJNL5u43Rwkwoh8y7%2FurdHnOUFookVLNJp6EeIMlhHsh9e%2BF5kWaVbZwPfzvVwVWWScoL%2FDx9c6wXm8svbqTb6tXgun8IPaeyt80xTFtg2swAphkB4KS00H5z4Te2O2RL%2F2Op%2BVZu7eVEpQUmTcZ1kR0Nahm5ueeIIPWvUIetV5N5%2FAnzGi5RvyFx0oFIJjPj9zSfi0jPxMbYSUIwF4ZQwyq5e9B%2BeCnX8atCyCs8UN2Sc1ZkFC0BA0ya5t%2F5AoxkdJWeMwMIo%2BcY7jk5anJShVhu9UT6m5bIpSaKdUA%3D%3D",
"expires": 1766010586850
}
},
"difficulty": "medium"
}
}
Response fields
Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.
| Field | Type | Example | Description |
|---|---|---|---|
puzzle | object | {…} | 9x9 grid representing the Sudoku puzzle with 0s for empty cells |
puzzle.grid | string | 674--3---1---72-9-5----1--4------8-3-1---8--52----61--7-1----8--53-97--19--8-4--- | |
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#000;border-bottom: 3px solid #000;border-left: 3px solid #000;'> <input type='text' value='8' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-bottom: 3px solid #000;border-left: 1px solid #000;'> <input type='text' value='' maxlength='1' /> </td><td style='border-top: 1px solid #000;border-bottom: 3px solid #000;border-left: 1px solid #000;'> <input type='text' value='4' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-bottom: 3px solid #000;border-left: 3px solid #000;'> <input type='text' value='' maxlength='1' /> </td><td style='border-top: 1px solid #000;border-bottom: 3px solid #000;border-left: 1px solid #000;'> <input type='text' value='' maxlength='1' /> </td><td style='border-top: 1px solid #000;border-bottom: 3px solid #000;border-left: 1px solid #000;border-right: 3px solid #000;'> <input type='text' value='' maxlength='1' /> </td></tr></table></body></html> | |
puzzle.image | object | {…} | |
puzzle.image.imageName | string | d1b59df4-7ab2-474e-b269-e34ce212b469_puzzle.png | |
puzzle.image.format | string | .png | |
puzzle.image.downloadURL | string | https://storage.googleapis.com/apiverve/APIData/sudoku/d1b59df4-7ab2-474e-b269-e34ce212b469_puzzle.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010586&Signature=jFaR0KjqZtGbKvnH7wPVVfz88z4mRT9bgs54W%2BEyU%2B%2B4%2BbXZdqK8wafALwJpk89vRjhsTpaX6huE8SDkDl6U6VY452LDEnv1kOT6SASgttUbUVnnfoyJFfaEQIreHun6Y0dCAIA8RpJ27kBGorHAN9cgvA3N4wLTrzKGXd%2B3ULxbYivUNIjxgXFqeOCNeHhYHOU46i6voYYC7VYaibkpqwwD%2BYw0jQOXzVevwEVmP%2BhfQ0B1mToPnsyzS8Bo2b8Vtyh78YLh3u30KPKoio1%2FbNZ1KYI6hUpZ9UlnQFAN91Wg%2BFVlG4clYhGgwcPsjsq5xUUsdty4JmYYVocturuXrQ%3D%3D | |
puzzle.image.expires | number | 1766010586784 | |
solutionPremium | object | {…} | Complete solution grid for the puzzle |
solution.gridPremium | string | 674953218138472596592681734465129873319748625287536149741365982853297461926814357 | |
solution.htmlPremium | string | <html><head><title>Sudoku Solution</title><style>table {border-collapse: collapse; width: 300px; height: 300px;}td {text-align: center; width: 30px; height: 30px; padding: 0;}input {width: 100%; height: 100%; text-align: center; font-size: 18px; border: none;}</style></head><body><table><tr><td style='border-top: 3px solid #000;border-left: 3px solid #000;'> <input type='text' value='6' maxlength='1' disabled /> </td><td style='border-top: 3px solid #000;border-left: 1px solid #000;'> <input type='text' value='7' maxlength='1' disabled /> </td><td style='border-top: 3px solid #000;border-left: 1px solid #000;'> <input type='text' value='4' maxlength='1' disabled /> </td><td style='border-top: 3px solid #000;border-left: 3px solid #000;'> <input type='text' value='9' maxlength='1' disabled /> </td><td style='border-top: 3px solid #000;border-left: 1px solid #000;'> <input type='text' value='5' maxlength='1' disabled /> </td><td style='border-top: 3px 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solution.imagePremium | object | {…} | |
solution.image.imageNamePremium | string | d0a6a5a0-c0e3-44cb-8417-e6590f793a7c_solution.png | |
solution.image.formatPremium | string | .png | |
solution.image.downloadURLPremium | string | https://storage.googleapis.com/apiverve/APIData/sudoku/d0a6a5a0-c0e3-44cb-8417-e6590f793a7c_solution.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010586&Signature=LVChpKLTdpScYP%2F%2FmDSgy9wp%2FECkftQIjWK%2FRZ8dtUjv%2BchJNL5u43Rwkwoh8y7%2FurdHnOUFookVLNJp6EeIMlhHsh9e%2BF5kWaVbZwPfzvVwVWWScoL%2FDx9c6wXm8svbqTb6tXgun8IPaeyt80xTFtg2swAphkB4KS00H5z4Te2O2RL%2F2Op%2BVZu7eVEpQUmTcZ1kR0Nahm5ueeIIPWvUIetV5N5%2FAnzGi5RvyFx0oFIJjPj9zSfi0jPxMbYSUIwF4ZQwyq5e9B%2BeCnX8atCyCs8UN2Sc1ZkFC0BA0ya5t%2F5AoxkdJWeMwMIo%2BcY7jk5anJShVhu9UT6m5bIpSaKdUA%3D%3D | |
solution.image.expiresPremium | number | 1766010586850 | |
difficulty | string | medium | Difficulty level of the generated puzzle |
Failure modes
Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.
| Status | What it means |
|---|---|
400 / 422 | The arguments did not validate. The message names the offending one. |
401 | The OAuth session is invalid or expired — reconnect the server. |
403 | Blocked by a key restriction or an IP allow-list. Never a bad identity. |
404 | This skill is not part of VerveKit. Check the catalog. |
429 | Out of credits, or a brief rate limit. The message tells them apart. |
A call costs 4 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.
Use cases
- Daily Newspaper Puzzles
- Editors generate fresh grids every morning to populate print syndicated puzzle columns across graded difficulty levels.
- Mobile Brain Teasers
- When a player starts a new match, game servers fetch a 9x9 board matching the player's chosen challenge tier.
- Classroom Logic Exercises
- Math instructors build printable worksheets featuring easy and medium grids to teach deduction rules to elementary students.
- Senior Mental Fitness
- Deliver randomized daily logic challenges directly to retirement community web portals without storing or manually designing static boards.
Other ways to use Sudoku Generator Skill
Set up Sudoku Generator Skill on VerveKit, or reach the same source a different way. Your VerveKit account and credits work on all of them — one key, one balance.
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