Api Endpoint

property.payapi.market

UK Stamp Duty Land Tax (SDLT) calculator with first-time buyer relief and surcharges.

Open interactive test console

Offering

Provider: property.payapi.market
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Financial Analysis
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://property.payapi.market/stamp-duty
MIME type: Not provided
First seen: 2026-10-16T01:51:40.954Z
Last seen: 2026-11-02T09:44:18.751Z
Tags: None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "payTo": "0xFFc458dB291b4ABcE020fE3de4f91F2770E537b1"
  }
]

Observed health

Status: Healthy
Latest latency: 96 ms
Average latency: 381 ms
HTTP status: 402
Last checked: 2026-11-02T09:44:18.746Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "POST",
        "PUT",
        "PATCH"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json",
        "form-data",
        "text"
      ]
    },
    "body": {
      "type": "object",
      "properties": {
        "price": {
          "type": "number",
          "minimum": 0,
          "description": "Property purchase price in GBP."
        },
        "is_first_time_buyer": {
          "type": "boolean",
          "description": "First-time buyers get relief on properties up to £625,000."
        },
        "is_additional_property": {
          "type": "boolean",
          "description": "Second homes / buy-to-let pay a 5% surcharge (Oct 2024 rates)."
        },
        "is_non_resident": {
          "type": "boolean",
          "description": "Non-UK residents pay an extra 2% surcharge."
        }
      },
      "required": [
        "price"
      ]
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "properties": {
            "is_additional_property": {
              "description": "Second homes / buy-to-let pay a 5% surcharge (Oct 2024 rates).",
              "type": "boolean"
            },
            "is_first_time_buyer": {
              "description": "First-time buyers get relief on properties up to £625,000.",
              "type": "boolean"
            },
            "is_non_resident": {
              "description": "Non-UK residents pay an extra 2% surcharge.",
              "type": "boolean"
            },
            "price": {
              "description": "Property purchase price in GBP.",
              "minimum": 0,
              "type": "number"
            }
          },
          "required": [
            "price"
          ],
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST",
            "PUT",
            "PATCH"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "breakdown": {
              "description": "Band-by-band breakdown.",
              "type": "array"
            },
            "buyer_type": {
              "type": "string"
            },
            "effective_rate": {
              "description": "Effective tax rate as a percentage.",
              "type": "number"
            },
            "price": {
              "type": "number"
            },
            "total_tax": {
              "description": "Total SDLT payable in GBP.",
              "type": "number"
            }
          },
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}