Bonafido API · APIs & MCP
Is this website a real, legit business?
Is this company website real? One call checks a domain, URL or email: DNS, domain age, mail setup, the live homepage, parked or for-sale…
Checkout by Stripe Free tier Subscription
Store › APIs & MCP › Sumbloom API
Sumbloom APITarget, Cage Grid and Brick Pyramid puzzles, easy to hard · by CyberMax
120 printable number puzzles, answers included
10,000 puzzles every month on the Sumbloom API and MCP server, 60 calls a minute.
Checkout by PolarFree: 50 puzzles/dayREST API + MCP14-day refund
- Secure checkout by Polar
- 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 Polar.
- Your licence key arrives by email; send it as a Bearer token.
Plans & pricing
| 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
10,000 puzzles every month on the Sumbloom API and MCP server, 60 calls a minute.
Buy nowSumbloom API Pro: 100,000 puzzles a month
$15/month
100,000 puzzles every month on the Sumbloom API and MCP server, 120 calls a minute.
Buy nowSumbloom API Starter yearly: 10,000 puzzles a month
$50/year
10,000 puzzles every month on the Sumbloom API and MCP server, 60 calls a minute.
Buy nowBest value
Sumbloom API Pro yearly: 100,000 puzzles a month
$150/year
100,000 puzzles every month on the Sumbloom API and MCP server, 120 calls a minute.
Buy nowWhat you get
10,000 puzzles every month on the Sumbloom API and MCP server, 60 calls a minute.
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.
What you get
- Your API key right after checkout (also in your email and the customer portal).
- Live usage at sumbloom.cybermax-tools.workers.dev/key; failed calls are not counted.
- Same fast edge API as the free tier, without the 50-a-day limit.
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.
FAQ
- What does it cost per call? $0.50 per 1,000 puzzles on this plan, if you use the full quota.
- Why not stay on the free tier? Free is 50 puzzles a day per IP address, fine for trying it. A key gives you 10,000 puzzles, 60 calls a minute, works from shared servers and serverless functions, and includes commercial use.
- What happens if I run out? The key stops at the quota with a clear "quota_exceeded" answer (HTTP 429): no overage charges, ever. It resets on the 1st of each month (UTC), or upgrade any time.
- Try before you buy? Yes, the free tier and the live Try-it on sumbloom.cybermax-tools.workers.dev need no key and no sign-up.
Monthly subscription; cancel any time in the Polar customer portal. One key per customer; don't share or resell it. © 2026 CyberMax.
For developers: API, keys and MCP
- Send it as
x-api-key: YOUR_KEYorAuthorization: Bearer YOUR_KEY(works in Claude, Cursor and any MCP client).
Docs and a live Try-it: sumbloom.cybermax-tools.workers.dev · OpenAPI: sumbloom.cybermax-tools.workers.dev/openapi.json
- Can an AI agent use it? Yes: add the MCP URL sumbloom.cybermax-tools.workers.dev/mcp to Claude, Cursor or any MCP client with your key as a Bearer header.
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 Polar. 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 Polar (merchant of record, payments by 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.cybermax-tools.workers.dev/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
Related products
CyberMax API All-Access · APIs & MCP
Every CyberMax API. One key.
One key for all 9 CyberMax APIs and MCP servers: monthly with each API's entry-plan allowance ($171 separately), or this $32 pack with…
Checkout by Stripe Subscription
from $32▶ See every API it unlocksView
Dutyfinch API · APIs & MCP
Every US duty rate and China tariff, one call
US tariff lookup API and MCP server: HTS code lookup and keyword search with official duty rates, Section 301 China list status (lists…
Checkout by Stripe Free tier Subscription
Feedpeck API · APIs & MCP
Find any website's RSS feed in seconds
Find and read every RSS, Atom and JSON feed a website publishes (up to 5 sites per call), validated, with the latest posts.
Checkout by Polar Free tier Subscription
Prices and plans generated from live Polar data on 27 Sep 2026.
from $5/monthSee plans & buy