{
  "x402Version": 2,
  "id": 3690,
  "slug": "3690",
  "resource": "https://api.webbersites.com/api/calc",
  "description": "Exact math for agents — the arithmetic LLMs get plausibly wrong. Evaluates an expression at 50-significant-digit precision (BigNumber): big-integer multiplication, high-precision division, roots, logs, factorials, unit conversions (12 inch to cm). GET ?expr=…, result returned as an exact string. Deterministic, no AI, never executed as code.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xdd5fcEa81CA6f1EB39FEd5B973DE794293B81ba6",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "1000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "expr": "8347293847 * 9928374652"
          },
          "type": "http"
        },
        "output": {
          "example": {
            "expr": "8347293847 * 9928374652",
            "precision": "50 significant digits",
            "result": "82875060643350366244",
            "type": "BigNumber"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {
                  "expr": {
                    "description": "Math expression, max 400 chars — e.g. '2^128', 'sqrt(2)', '12 inch to cm'",
                    "type": "string"
                  }
                },
                "required": [
                  "expr"
                ],
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "expr": {
                    "type": "string"
                  },
                  "result": {
                    "description": "exact result as a string",
                    "type": "string"
                  },
                  "result_number": {
                    "description": "float64 companion when finite",
                    "type": "number"
                  },
                  "type": {
                    "type": "string"
                  }
                },
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "api.webbersites.com",
  "lastUpdated": "2026-09-16T16:32:23.492Z",
  "quality": {
    "calls30d": 8,
    "uniquePayers30d": 4,
    "lastCalledAt": "2026-09-16T16:32:23.242Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.webbersites.com",
    "manifest_name": "api.webbersites.com",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}