Sudoku is a simple tool for generating Sudoku puzzles. It returns a Sudoku puzzle.
Try it — live request, no key required
GETapi.apiverve.com/v1/sudoku
VerificationFormat
No key required to try it. Get a key to use it in your app.
{
"status": "ok",
"error": null,
"data": {
// Sudoku Generator response payload
}
}
About the Sudoku Generator API
Sudoku works by analyzing the data provided and generating a Sudoku puzzle. It uses various sources to determine the data and returns a Sudoku puzzle.
Ways to call it
One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.
- JSON
- Default REST response
- XML
- Markup format
- YAML
- Human-readable
- CSV
- Tabular export
- GraphQL
- Query language
- MCP
- For AI agents
Beta
New
Other ways to use Sudoku Generator
Same data, same APIVerve account, same credit balance — one key works on all of them.
What does the Sudoku Generator API do?
Sudoku is a simple tool for generating Sudoku puzzles. It returns a Sudoku puzzle.
How do I authenticate Sudoku Generator API requests?
Pass your API key in the x-api-key header over HTTPS. One key works across all 300+ APIVerve APIs — there are no per-endpoint credentials.
How much does the Sudoku Generator API cost?
Each call spends 4 credits from your shared pool. The free tier includes 200 credits every month, and paid plans add more headroom.
How fast is the Sudoku Generator API?
Response time depends on the endpoint — the p50 through p99 latency for this API is published on this page. Requests are served over HTTPS through a global edge network.
What response formats does the Sudoku Generator API support?
JSON by default, plus XML and YAML via the format parameter. GraphQL and an MCP interface for AI agents are available across the catalog.
What HTTP method does the Sudoku Generator API use?
GET over HTTPS, following standard REST conventions with a consistent { status, error, data } response envelope.
Request parameters — GET /v1/sudoku
Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.
Optional
| Parameter | Type | Example | Description |
|---|---|---|---|
difficultyOptional | string | medium | The difficulty level of the Sudoku puzzle to generateeasymediumhardexpertdefault medium |
curl "https://api.apiverve.com/v1/sudoku?difficulty=medium" \
-H "x-api-key: YOUR_API_KEY"Authentication
Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.
| Header | When | Value |
|---|---|---|
x-api-keyRequired | Every request | Your API key. Header names are case-insensitive, so X-API-Key is the same header. |
AuthorizationAlternate | Instead of the above | Bearer <key> — for clients that only expose bearer auth. Resolves to the same account and the same billing. |
401 is the only auth verdict
A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.
Response — GET /v1/sudoku
Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.
{
"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---",
"html": "<html><head><title>Sudoku Puzzle</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='' maxlength='1' /> </td><td style='border-top: 3px solid #000;border-left: 1px solid #000;'> <input type='text' value='' maxlength='1' /> </td><td style='border-top: 3px solid #000;border-left: 1px solid #000;'> <input 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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",
"html": "<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 solid #000;border-left: 1px 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value='3' maxlength='1' disabled /> </td><td style='border-top: 3px solid #000;border-left: 1px 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='5' 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='8' maxlength='1' disabled /> </td><td style='border-top: 3px solid #000;border-left: 1px solid #000;border-right: 3px solid #000;'> <input type='text' value='2' maxlength='1' disabled /> </td></tr><tr><td style='border-top: 1px solid #000;border-left: 3px solid #000;'> <input type='text' value='8' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-left: 1px solid #000;'> <input type='text' value='5' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-left: 1px solid #000;'> <input type='text' value='3' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-left: 3px solid #000;'> <input type='text' value='2' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-left: 1px solid #000;'> <input type='text' value='9' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-left: 1px solid #000;'> <input type='text' value='7' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-left: 3px solid #000;'> <input type='text' value='4' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-left: 1px solid #000;'> <input type='text' value='6' maxlength='1' disabled /> </td><td style='border-top: 1px solid #000;border-left: 1px solid #000;border-right: 3px solid #000;'> <input type='text' value='1' maxlength='1' disabled /> </td></tr><tr><td style='border-top: 1px solid #000;border-bottom: 3px solid #000;border-left: 3px solid #000;'> <input type='text' value='9' 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='2' 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='6' 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='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='1' 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='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='3' 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='5' maxlength='1' disabled /> </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='7' maxlength='1' disabled /> </td></tr></table></body></html>",
"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 |
grid | string | "674--3---1---72-9-5----1--4------8-3-1---8--52----61--7-1----8--53-97--19--8-4---" | |
html | string | "<html><head><title>Sudoku Puzzle</title><style>table {border-collapse: collapse; width: 300px; height: 300px;}td {text-align: center; width… | |
image | object | {...} | |
imageName | string | "d1b59df4-7ab2-474e-b269-e34ce212b469_puzzle.png" | |
format | string | ".png" | |
downloadURL | string | "https://storage.googleapis.com/apiverve/APIData/sudoku/d1b59df4-7ab2-474e-b269-e34ce212b469_puzzle.png?GoogleAccessId=635500398038-compute%… | |
expires | number | 1766010586784 | |
solutionPremium | object | {...} | Complete solution grid for the puzzle |
gridPremium | string | "674953218138472596592681734465129873319748625287536149741365982853297461926814357" | |
htmlPremium | string | "<html><head><title>Sudoku Solution</title><style>table {border-collapse: collapse; width: 300px; height: 300px;}td {text-align: center; wid… | |
imagePremium | object | {...} | |
imageNamePremium | string | "d0a6a5a0-c0e3-44cb-8417-e6590f793a7c_solution.png" | |
formatPremium | string | ".png" | |
downloadURLPremium | string | "https://storage.googleapis.com/apiverve/APIData/sudoku/d0a6a5a0-c0e3-44cb-8417-e6590f793a7c_solution.png?GoogleAccessId=635500398038-comput… | |
expiresPremium | number | 1766010586850 | |
difficulty | string | "medium" | Difficulty level of the generated puzzle |
Response headers
Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.
| Header | What it carries |
|---|---|
x-api-remaining-credits | Credits left in the current cycle |
x-api-credits-used | Credits spent in the current cycle |
x-api-max-credits | The allowance for the cycle |
x-api-version | Version of the endpoint that answered |
Errors
Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.
| Status | Meaning | What to do |
|---|---|---|
400 | Input was rejected | Read error; it names the parameter that has to change. |
401 | Key missing or invalid | Check the header name and the key value. |
403 | Key valid, but not permitted here | A key restriction or an IP allow-list — never a bad key. |
429 | Rate limited, or out of credits | Read error to tell them apart, then back off or top up. |
What a call costs — 4 credits per call
Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.
| Plan | Per month | Credits | Sudoku Generator calls | Per 1,000 calls |
|---|---|---|---|---|
| Free | Free | 200 | 50 | Free |
| Starter | $29.99 | 200,000 | 50,000 | $0.60 |
| Pro | $99.99 | 1,000,000 | 250,000 | $0.40 |
| Mega | $299.99 | 4,000,000 | 1,000,000 | $0.30 |
Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.
Call it from cURL — GET /v1/sudoku
No SDK to install — this is a plain HTTPS call to /v1/sudoku with your key in the x-api-key header. Swap in a real key and it runs as-is.
curl "https://api.apiverve.com/v1/sudoku" \
-H "x-api-key: YOUR_API_KEY"Resources
GitHubapiverve/sudoku-apiSource, issues and the examples this page is built from.ReferenceSudoku Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from Node.js — GET /v1/sudoku
Install the Node.js SDK, then call the Sudoku Generator API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.
npm install @apiverve/sudokuconst res = await fetch("https://api.apiverve.com/v1/sudoku", {
headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);Resources
npm@apiverve/sudokuThe published Node.js client, versioned and signed.GitHubapiverve/sudoku-apiSource, issues and the examples this page is built from.ReferenceSudoku Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from Python — GET /v1/sudoku
No SDK to install — this is a plain HTTPS call to /v1/sudoku with your key in the x-api-key header. Swap in a real key and it runs as-is.
import requests
res = requests.get(
"https://api.apiverve.com/v1/sudoku",
headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])Resources
GitHubapiverve/sudoku-apiSource, issues and the examples this page is built from.ReferenceSudoku Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from C# / .NET — GET /v1/sudoku
Install the C# / .NET SDK, then call the Sudoku Generator API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.
dotnet add package APIVerve.API.SudokuGeneratorusing var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");
var json = await client.GetStringAsync("https://api.apiverve.com/v1/sudoku");
Console.WriteLine(json);Resources
NuGetAPIVerve.API.SudokuGeneratorThe published C# / .NET client, versioned and signed.GitHubapiverve/sudoku-apiSource, issues and the examples this page is built from.ReferenceSudoku Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from Go — GET /v1/sudoku
No SDK to install — this is a plain HTTPS call to /v1/sudoku with your key in the x-api-key header. Swap in a real key and it runs as-is.
req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/sudoku", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))Resources
GitHubapiverve/sudoku-apiSource, issues and the examples this page is built from.ReferenceSudoku Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from PHP — GET /v1/sudoku
No SDK to install — this is a plain HTTPS call to /v1/sudoku with your key in the x-api-key header. Swap in a real key and it runs as-is.
$ch = curl_init("https://api.apiverve.com/v1/sudoku");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);
$response = curl_exec($ch);
echo $response;Resources
GitHubapiverve/sudoku-apiSource, issues and the examples this page is built from.ReferenceSudoku Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Call it from Ruby — GET /v1/sudoku
No SDK to install — this is a plain HTTPS call to /v1/sudoku with your key in the x-api-key header. Swap in a real key and it runs as-is.
require "net/http"
uri = URI("https://api.apiverve.com/v1/sudoku")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"
res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.bodyResources
GitHubapiverve/sudoku-apiSource, issues and the examples this page is built from.ReferenceSudoku Generator API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.
Also published for
Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.
Zero-code embed — one snippet, no backend
Drop an interactive Sudoku Generator form onto any page. The widget calls the API for you, so no key ever appears in your markup and there is nothing to deploy.
Loading preview…
Changelog — Sudoku Generator API
Every change to this endpoint, newest first. Breaking changes ship as a new version and the previous one keeps serving — response fields are added, never removed or retyped in place, so an integration written against v1 keeps working.
Nothing recorded yet
Entries are picked up from dated catalog snapshots, so the first one appears after the next snapshot that moves something. A period where nothing changed produces no entry — silence is a valid changelog for the Sudoku Generator API.
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