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Store › APIs & MCP › Sumbloom API
Sumbloom APITarget, Cage Grid and Brick Pyramid puzzles, easy to hard · by CyberMax
120 printable number puzzles, answers included
Original number puzzles for apps, classroom tools, newsletters and AI agents: 1,800 solver-checked Cage Grids (4x4 to 6x6, exactly one solution each), Target puzzles and Brick Pyramids at 3 levels, as JSON or printable SVG with solutions, plus a daily puzzle.
Checkout by StripeFree: 50 puzzles/dayREST API + MCP14-day refund
- Secure checkout by Stripe
- Tax handled at checkout
- Instant delivery by email
- 14-day refund if it doesn't work as described
- Cancel subscriptions any time
- Human support: cybermax.tools@gmail.com
Who it's for
- teachers (grades 3-8)
- homeschool parents
- puzzle lovers
- tutors
Try it now, free
Real, live results in one click. No sign-up, no code.
Real sample output
| # | Kind | Level | Puzzle |
|---|---|---|---|
| 1 | Target | Easy | 4 5 6 9 9 20 → 99 |
| 31 | Cage Grid 4×4 | Easy | 10 cages, one solution |
| 51 | Cage Grid 5×5 | Medium | one solution |
| 71 | Cage Grid 6×6 | Hard | one solution |
| 111 | Brick Pyramid | Hard | 5 givens, algebra needed |
from the book's puzzles.json, Sumbloom Puzzle Book Vol. 1 v1.0.0
Why buyers pick Sumbloom API
13 puzzle kinds, easy to hard, 120 in all.
2Every Cage Grid and Pyramid has exactly one solution (solver-checked).
3US Letter + A4 PDFs with a full answer key.
44 cents a puzzle, classroom copies included
How it works
- Try the free tier: no key, no signup.
- Pick a plan and pay by card with Stripe.
- Your API key arrives by email; send it as a Bearer token.
Plans & pricing
14-day money-back promise: if it doesn't work as described, email us within 14 days and we fix it or refund you in full. Refund terms.
| Free | Starter | Pro | Starter yearly | Pro yearly | |
|---|---|---|---|---|---|
| Price | $0 | $5/month | $15/month | $50/year | $150/year |
| Included | 50 puzzles a day | 10,000 puzzles a month | 100,000 puzzles a month | 10,000 puzzles | 100,000 puzzles |
| Per 1,000 | free | $0.50 | $0.15 | $5.00 | $1.50 |
| Key | none | by email, instantly | by email, instantly | by email, instantly | by email, instantly |
| Try free | Buy | Buy | Buy | Buy |
Sumbloom API Starter: 10,000 puzzles a month
$5/month
Original number puzzles for apps, classroom tools, newsletters and AI agents: 1,800 solver-checked Cage Grids (4x4 to 6x6, exactly one solution each), Target puzzles and Brick…
Buy nowSumbloom API Pro: 100,000 puzzles a month
$15/month
Original number puzzles for apps, classroom tools, newsletters and AI agents: 1,800 solver-checked Cage Grids (4x4 to 6x6, exactly one solution each), Target puzzles and Brick…
Buy nowSumbloom API Starter yearly: 10,000 puzzles a month, billed yearly
$50/year
Original number puzzles for apps, classroom tools, newsletters and AI agents: 1,800 solver-checked Cage Grids (4x4 to 6x6, exactly one solution each), Target puzzles and Brick…
Buy nowBest value
Sumbloom API Pro yearly: 100,000 puzzles a month, billed yearly
$150/year
Original number puzzles for apps, classroom tools, newsletters and AI agents: 1,800 solver-checked Cage Grids (4x4 to 6x6, exactly one solution each), Target puzzles and Brick…
Buy nowWhat's inside
Original number puzzles for apps, classroom tools, newsletters and AI agents: 1,800 solver-checked Cage Grids (4x4 to 6x6, exactly one solution each), Target puzzles and Brick Pyramids at 3 levels, as JSON or printable SVG with solutions, plus a daily puzzle. Paid keys include commercial use in your app or product.
- Free tier: 50 puzzles a day without a key
- Open the Sumbloom API live demo
How the price compares
Puzzle APIs: API Ninjas needs its $39/month Developer plan for commercial use of its Sudoku API; SUDOKU All-Purpose PRO on RapidAPI is $49 for 50,000 (checked 27 Sep 2026). No rival generates cage, target and pyramid puzzles; Sumbloom Starter is $5/month for 10,000 and Pro $15 for 100,000, commercial use included.
| Vs rivals (per puzzle generated (commercial use included)) | Plan | Per 1,000 |
|---|---|---|
| API Ninjas Developer (Sudoku, shared quota) | $39 / 100,000 calls | $0.39 |
| SUDOKU All-Purpose PRO (RapidAPI) | $49 / 50,000 | $0.98 |
| YouDoSudoku | free, sudoku only, JSON | $0 |
| Sumbloom Pro | $15 / 100,000 puzzles | $0.15 |
- API Ninjas Sudoku API (checked 2026-09-26): Commercial use of the Sudoku API is not permitted on the free tier; plans (https://api-ninjas.com/pricing): Free 3,000 calls/mo; Developer $39/mo (yearly) = 100,000; Business $99/mo (yearly) = 1,000,000
Refund policy
14-day money-back promise. If it doesn't work as described, email us within 14 days and we fix it or refund you in full. Duplicate charges are always refunded; failed API calls are never counted. Read the full policy.
Questions
How do I get it after paying?
Checkout is handled by Stripe. Your download, licence key or API key and your receipt arrive by email right after payment.
Can I get a refund?
Yes. If it doesn't work as described, email us within 14 days and we fix it or refund you in full. See the refund policy.
Is checkout secure?
Card details go only to Stripe. CyberMax never sees them; sales tax or VAT is calculated at checkout.
Can I cancel?
Any time, from the link in your receipt email. You keep access until the end of the paid period.
Can I try before buying?
Yes: the free tier gives 50 puzzles a day with no key and no signup.
Can AI agents use it?
Yes. The same key works on the REST API and the remote MCP server at https://sumbloom.cybermaxtools.com/mcp.
Why not API Ninjas Sudoku API?
Puzzle APIs: API Ninjas needs its $39/month Developer plan for commercial use of its Sudoku API; SUDOKU All-Purpose PRO on RapidAPI is $49 for 50,000 (checked 27 Sep 2026). No rival generates cage, target and pyramid puzzles; Sumbloom Starter is $5/month for 10,000 and Pro $15 for 100,000, commercial use included.
Download the free sampler
Sumbloom API · from $5/month
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