{
  "offer": "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",
  "name": "sumbloom-puzzles",
  "title": "Sumbloom Puzzles by CyberMax",
  "url": "https://sumbloom.cybermaxtools.com/mcp",
  "transport": "streamable-http",
  "tools": [
    {
      "name": "get_number_puzzle",
      "description": "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."
    }
  ],
  "authentication": {
    "required": false,
    "optional": {
      "type": "bearer",
      "header": "Authorization",
      "note": "Paid API key for higher limits: https://sumbloom.cybermaxtools.com/docs#pricing"
    }
  },
  "pricing": {
    "api": "Sumbloom API",
    "currency": "USD",
    "free": {
      "price": 0,
      "callsPerDayPerIp": 50,
      "perMinutePerIp": 30,
      "key": "none needed"
    },
    "plans": [
      {
        "id": "starter",
        "name": "Starter",
        "price": 5,
        "billing": "per month",
        "calls": 10000,
        "per": "calendar month (UTC)",
        "perMinute": 60,
        "buy": "https://sumbloom.cybermaxtools.com/buy/starter?s=mcpcard"
      },
      {
        "id": "pro",
        "name": "Pro",
        "price": 15,
        "billing": "per month",
        "calls": 100000,
        "per": "calendar month (UTC)",
        "perMinute": 120,
        "buy": "https://sumbloom.cybermaxtools.com/buy/pro?s=mcpcard"
      },
      {
        "id": "starter-yearly",
        "name": "Starter yearly",
        "price": 50,
        "billing": "per year",
        "calls": 10000,
        "per": "calendar month (UTC)",
        "perMinute": 60,
        "buy": "https://sumbloom.cybermaxtools.com/buy/starter-yearly?s=mcpcard"
      },
      {
        "id": "pro-yearly",
        "name": "Pro yearly",
        "price": 150,
        "billing": "per year",
        "calls": 100000,
        "per": "calendar month (UTC)",
        "perMinute": 120,
        "buy": "https://sumbloom.cybermaxtools.com/buy/pro-yearly?s=mcpcard"
      }
    ],
    "unit": "puzzles",
    "howToUse": {
      "header": "x-api-key: YOUR_KEY",
      "alt": [
        "Authorization: Bearer YOUR_KEY",
        "?key=YOUR_KEY"
      ],
      "mcp": "send the key as Authorization: Bearer YOUR_KEY",
      "usage": "https://sumbloom.cybermaxtools.com/key"
    },
    "manageKey": "https://sumbloom.cybermaxtools.com/manage",
    "payments": "Stripe Checkout: card, Apple Pay, Google Pay, Link. Prices are in USD; where your country charges VAT or sales tax, Stripe adds it at checkout and shows it before you pay. Cancel any time at https://sumbloom.cybermaxtools.com/manage.",
    "x402": {
      "protocol": "x402",
      "versions": [
        1,
        2
      ],
      "scheme": "exact",
      "network": [
        "base",
        "eip155:8453"
      ],
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "currency": "USDC",
      "price": {
        "perCallUsd": 0.002
      },
      "payPerCallEndpoints": [
        "https://sumbloom.cybermaxtools.com/x402/v1/puzzle",
        "https://sumbloom.cybermaxtools.com/x402/v1/puzzle.svg"
      ],
      "alsoOn": "the plain endpoints answer 402 with the same terms once the free daily quota is used up (no key sent)",
      "headers": {
        "request": [
          "X-PAYMENT (v1)",
          "PAYMENT-SIGNATURE (v2)"
        ],
        "response": [
          "X-PAYMENT-RESPONSE",
          "PAYMENT-RESPONSE"
        ]
      },
      "mcp": "send the X-PAYMENT header on the /mcp POST once the free tier is used up"
    }
  },
  "description": "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."
}