Developer documentation ⌄
Sudoku API pricing
All API calls are free. Create an API key and credit Sudokumax on everything you publish.
Included
- All eight REST endpoints and MCP tools
- Up to 20 puzzles per request
- 60 authenticated requests per account per minute
- A4 and Letter PDF exports with answer sheets
- Playable links and public collections
Additional shared service limits may apply. There are no automatic overage charges.
Online: include a visible hyperlink
Place a clickable credit alongside the puzzle or game. Link to sudokumax.com. This applies to websites, apps and other online publications using API-generated content.
<a href="https://sudokumax.com">Created with Sudokumax</a>Preview: Created with Sudokumax
Offline: print the website address
Include Created with Sudokumax · sudokumax.com legibly on every worksheet, answer sheet, image or other exported puzzle. A QR code can accompany the address but does not replace it.
Our PDF exports already include the logo, website address and clickable credit on every page. Keep them if you edit or redistribute the file. For images posted online, also add a clickable link in the page or caption.
Access and enforcement
You can revoke your own keys. Sudokumax can revoke a key or suspend an account for missing attribution or abuse. This blocks new requests and associated PDF download links; it cannot recall material already downloaded or public puzzle links.