# Domain WHOIS Monitoring API
Retrieve domain registration, registrar, nameserver, and expiry data.
## API Overview
- **HTTP Protocol:** HTTPS
- **HTTP Method:** GET
- **HTTP Endpoint:** https://api.gugudata.io/v1/websitetools/whois
- **Response Type:** application/json; charset=utf-8
- **DEMO Endpoint:** https://api.gugudata.io/v1/websitetools/whois/demo
- **Live Demo:** https://gugudata.io/demo/whois
- **Postman:** https://www.postman.com/gugudata/gugudata-io
- **LLM Page:** https://gugudata.io/details/whois/llm
- **Raw Markdown:** https://gugudata.io/details/whois/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
- Domain registration lookup: Look up WHOIS registration details for a domain and use them in monitoring, support, or ownership review workflows.
- Registrar and nameserver fields: Return registrar, status, nameserver, creation, and expiry fields when the upstream data source provides them.
- Domain expiry monitoring: Use expiry and registration dates to detect renewal risk for owned domains, customer domains, or watched assets.
- Security and operations review: Support incident review, onboarding checks, domain portfolio audits, and suspicious-domain investigation workflows.
- Structured output for dashboards: Use normalized WHOIS fields in admin panels, asset inventories, compliance reports, and scheduled monitoring jobs.
- Standalone WHOIS interface: Buy this API independently when your workflow needs registration data rather than DNS, SSL, or geolocation checks.
## API Request Parameters
| Name | Type | Is Required | Default Value | Remark |
| --- | --- | --- | --- | --- |
| appkey | string | true | YOUR_APPKEY | API key used to authenticate the request. |
| domain | string | true | | Domain name or HTTPS origin to inspect. |
## API Response Parameters
| Name | Type | Remark |
| --- | --- | --- |
| 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.domain_name | array<string> | Domain name(s) found in WHOIS record. |
| data.registrar | string | Domain registrar information. |
| data.creation_date | array<string> | Domain creation date(s). |
| data.expiration_date | array<string> | Domain expiration date(s). |
| data.updated_date | array<string> | Domain last update date(s). |
| data.name_servers | array<string> | Domain nameservers. |
| data.status | array<string> | Domain status information. |
| data.org | string | Organization name. |
| data.country | string | Country code. |
| data.emails | array<string> | Contact email addresses. |
| data.dnssec | string | DNSSEC status. |
## 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/whois?appkey=YOUR_APPKEY&domain=YOUR_VALUE'
```