API · x402

Generate 1-20 classic 9x9 sudoku puzzles with a proven-unique solution, 180-degree symm…

Generate 1-20 classic 9x9 sudoku puzzles with a proven-unique solution, 180-degree symmetric givens and a technique grade (easy/medium/hard/expert) decided by a human-style solver, not by clue count. Deterministic for a given seed. Returns puzzle + solution s…

by Quietforge Docs API · verified provider · updated 2026-09-22

What it does

Tags: sudoku · puzzle · generator · games · content

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/15977.json for the price and payment options.
Pay. Call GET https://qf-api.quietforge-studio.workers.dev/v1/sudoku. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0x3F5115236f25618c16021E983acaAF2CAaa1A35e	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x3F5115236f25618c16021E983acaAF2CAaa1A35e",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "type": "object",
  "properties": {
    "seed": {
      "type": "integer"
    },
    "count": {
      "type": "integer"
    },
    "format": {
      "type": "string"
    },
    "grading": {
      "type": "object"
    },
    "symmetry": {
      "type": "string"
    },
    "unique_solution": {
      "type": "boolean"
    },
    "puzzles": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "n": {
            "type": "integer"
          },
          "level": {
            "type": "string",
            "enum": [
              "easy",
              "medium",
              "hard",
              "expert"
            ]
          },
          "givens": {
            "type": "integer"
          },
          "techniques": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "puzzle": {
            "type": "string",
            "description": "81 chars, row by row, 0 = empty"
          },
          "solution": {
            "type": "string",
            "description": "81 chars"
          }
        },
        "required": [
          "n",
          "level",
          "givens",
          "puzzle",
          "solution"
        ]
      }
    },
    "elapsed_ms": {
      "type": "integer"
    }
  },
  "required": [
    "seed",
    "count",
    "puzzles"
  ]
}

Example shape — generated from the schema, not a captured live response

{
  "seed": 0,
  "count": 0,
  "format": "string",
  "grading": {},
  "symmetry": "string",
  "unique_solution": true,
  "puzzles": [
    {
      "n": 0,
      "level": "easy",
      "givens": 0,
      "techniques": [
        "string"
      ],
      "puzzle": "string",
      "solution": "string"
    }
  ],
  "elapsed_ms": 0
}

Examples

curl

curl "https://qf-api.quietforge-studio.workers.dev/v1/sudoku"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://qf-api.quietforge-studio.workers.dev/v1/sudoku");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://qf-api.quietforge-studio.workers.dev/v1/sudoku")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: Quietforge Docs API
Endpoint: https://qf-api.quietforge-studio.workers.dev/v1/sudoku
Machine-readable: /resources/15977.json