# Check which websites have an SSL certificate expiring soon

**Use case:** 

Get the days remaining on every site's TLS certificate, plus the issuing authority, in one run. Paste a list of domains you depend on and get one row each showing how long its certificate has left. Useful as a standing check on vendors and your own properties, because an expired certificate takes a site down with a full browser warning.

## Input

```json
{
  "urls": [
    "github.com",
    "stripe.com",
    "cloudflare.com",
    "wikipedia.org",
    "mozilla.org",
    "python.org"
  ],
  "include_versions": true,
  "include_confidence": true,
  "timeout_seconds": 15
}
```

## Output

```json
{
  "domain": {
    "label": "Domain",
    "format": "string"
  },
  "techCount": {
    "label": "Technology count",
    "format": "integer"
  },
  "techNames": {
    "label": "Technology names",
    "format": "array"
  },
  "cdn": {
    "label": "CDN",
    "format": "string"
  },
  "tls.issuer": {
    "label": "TLS Issuer",
    "format": "text"
  },
  "tls.daysUntilExpiry": {
    "label": "TLS Expires (days)",
    "format": "number"
  },
  "mail.provider": {
    "label": "Mail Provider",
    "format": "text"
  },
  "httpStatus": {
    "label": "HTTP status",
    "format": "integer"
  },
  "charged": {
    "label": "Charged",
    "format": "boolean"
  },
  "error": {
    "label": "Error",
    "format": "string"
  }
}
```

## About this Actor

This example demonstrates how to use [Tech Stack & Infrastructure Lookup](https://apify.com/catalyst_prime/tech-stack-lookup.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/catalyst_prime/tech-stack-lookup.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/catalyst_prime/tech-stack-lookup.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).