# International Phone Number Validation and Correction
Validate international phone numbers and normalize valid values to E.164.
## API Overview
- **HTTP Protocol:** HTTPS
- **HTTP Method:** GET
- **HTTP Endpoint:** https://api.gugudata.io/v1/websitetools/international-phone-format
- **Response Type:** application/json; charset=utf-8
- **DEMO Endpoint:** https://api.gugudata.io/v1/websitetools/international-phone-format/demo
- **Live Demo:** https://gugudata.io/demo/international-phone-format
- **Postman:** https://www.postman.com/gugudata/gugudata-io
- **LLM Page:** https://gugudata.io/details/international-phone-format/llm
- **Raw Markdown:** https://gugudata.io/details/international-phone-format/llm.md
## Remote MCP
- **MCP Endpoint:** https://mcp.gugudata.io/mcp
- **MCP Guide:** https://gugudata.io/mcp/
- **Authorization:** OAuth authorization opens in the browser; do not paste appkeys into MCP clients.
- **Tool Scope:** MCP clients receive GuGuData API tools available to the authorized account.
## Data & API Features
- Numbering-plan validation: Check whether an international number is valid under its regional numbering plan.
- E.164 normalization: Return valid numbers in a consistent international format for storage and exchange.
- Flexible input formatting: Accept common separators such as spaces, hyphens, periods, and parentheses.
- Country and calling codes: Return the calling code and ISO region codes when they can be determined.
- Clear invalid-number results: Distinguish malformed input from a well-formed number that is not valid.
- Contact-data workflows: Prepare phone data for CRM, registration, messaging, and voice applications.
## API Request Parameters
| Name | Type | Is Required | Default Value | Remark |
| --- | --- | --- | --- | --- |
| appkey | string | true | YOUR_APPKEY | API key used to authenticate the request. |
| phone | string | true | +1 (817) 569-8900 | International number beginning with +, up to 64 characters. Spaces, hyphens, periods, and parentheses are accepted. |
## API Response Parameters
| Name | Type | Remark |
| --- | --- | --- |
| dataStatus | object | Response metadata for the request. |
| dataStatus.requestParameter | string | Privacy-safe summary of the normalized request. |
| dataStatus.statusCode | integer | Application-level status code. |
| dataStatus.status | string | Application-level result status. |
| dataStatus.statusDescription | string | Human-readable application status message. |
| dataStatus.responseDateTime | string | Time at which the response was generated. |
| dataStatus.dataTotalCount | integer | Number of matching or returned records for this request. |
| data | object | Phone validation result. |
| data.isValid | boolean | Whether the number is valid under the applicable numbering plan. |
| data.correctedMobileNumber | string | Valid number normalized to E.164, or an empty string when invalid. |
| data.countryCode | string | International calling code when determinable. |
| data.countryCode2 | string | ISO 3166-1 alpha-2 region code when determinable. |
| data.countryCode3 | string | ISO 3166-1 alpha-3 region code when determinable. |
## API Response Status Codes
| Status Code | Explanation of Status Code | Remarks |
| --- | --- | --- |
| 200 | Request processed successfully. | Some endpoints expose a separate application-level status field in the response body, such as `dataStatus.statusCode`. |
| 400 | Invalid request parameters or request format. | Check required fields, data types, and request body format. |
| 401 | Missing or unknown application key. | Provide a valid `appkey` with the request. |
| 403 | The application key is recognized but access is not allowed. | The key may be expired, inactive, or not permitted for the requested API. |
| 429 | Request rate or trial usage limit exceeded. | Reduce request frequency and retry with backoff. If a trial allowance is exhausted, check Trial Keys for remaining requests and subscribe to continue. |
| 500 | Internal service error. | Retry later or contact support if the error persists. |
| 503 | Upstream service unavailable. | Retry later; the requested upstream dependency is temporarily unavailable. |
## cURL Example
```bash
curl --location 'https://api.gugudata.io/v1/websitetools/international-phone-format?appkey=YOUR_APPKEY&phone=%2B1%20(817)%20569-8900'
```