Solve any N×N grid up to 64×64 via a simple REST API. Free tier included.
A 25×25 Sudoku solved in a single POST.
# Solve a 25×25 Sudoku
curl -X POST https://infinigrid-api-main-7b530f7.d2.zuplo.dev/v1/solve \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"n": 25,
"puzzle": [0,0,3,0,2,0,6,0,0,0,17,0,0,0,0,0,0,0,0,0,0,0,0,0,11, ...]
}'
# Response (200 OK)
{
"solved": true,
"n": 25,
"solution": [1,4,3,7,2,25,6,18,9,11,17,...]
}Pay only for the grid sizes you need.
All requests require a bearer token in the Authorization header.
Authorization: Bearer YOUR_API_KEY
Single endpoint for all solve operations.
POST https://infinigrid-api-main-7b530f7.d2.zuplo.dev/v1/solve
Send a JSON body. n must be a perfect square (4, 9, 16, 25, 36, 49, 64…). puzzle must be exactly n×n integers, each between 0 (unknown) and n (max value).
{
"n": 9,
"puzzle": [0, 0, 3, 0, 2, 0, 6, 0, 0, ...]
}
400Invalid input — malformed JSON or puzzle shape mismatch401Missing or invalid API key403Grid size exceeds your tier429Rate limit exceededNo credit card. Instant email delivery.