---
updatedAt: 2025-10-12T20:27:49.000Z
agentTools:
  projectIndex: https://docs.checkhq.com/llms.txt
---

# Validate address

Validate an address using Check's address validation engine.

# OpenAPI definition

```json
{
  "openapi": "3.1.0",
  "info": {
    "title": "check-api",
    "version": "2025-01-01"
  },
  "servers": [
    {
      "url": "https://sandbox.checkhq.com"
    }
  ],
  "components": {
    "securitySchemes": {
      "sec0": {
        "type": "apiKey",
        "in": "header",
        "name": "Authorization",
        "x-bearer-format": "bearer",
        "x-default": "YOUR_API_KEY"
      }
    }
  },
  "security": [
    {
      "sec0": []
    }
  ],
  "paths": {
    "/addresses/validate": {
      "post": {
        "summary": "Validate address",
        "description": "Validate an address using Check's address validation engine.",
        "operationId": "validate-address",
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "line1",
                  "city",
                  "state",
                  "postal_code"
                ],
                "properties": {
                  "line1": {
                    "type": "string"
                  },
                  "line2": {
                    "type": "string"
                  },
                  "city": {
                    "type": "string"
                  },
                  "state": {
                    "type": "string"
                  },
                  "postal_code": {
                    "type": "string"
                  },
                  "country": {
                    "type": "string",
                    "default": "US"
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "200",
            "content": {
              "application/json": {
                "examples": {
                  "Result": {
                    "value": "{}"
                  }
                },
                "schema": {
                  "type": "object",
                  "properties": {}
                }
              }
            }
          },
          "400": {
            "description": "400",
            "content": {
              "application/json": {
                "examples": {
                  "Result": {
                    "value": "{}"
                  }
                },
                "schema": {
                  "type": "object",
                  "properties": {}
                }
              }
            }
          }
        },
        "deprecated": false
      }
    }
  },
  "x-readme": {
    "headers": [],
    "explorer-enabled": true,
    "proxy-enabled": true
  },
  "x-readme-fauxas": true
}
```