# Backlinks API: referring domains of any site as JSON

**Use case:** 

The 500 strongest referring domains of vercel.com, each with its Open Authority 0-100 and link rank: the same call works over the Apify REST API, the Python and JavaScript clients or MCP, for one domain or thousands. Pay per row, no backlink-tool subscription.

## Input

```json
{
  "domains": [
    "vercel.com"
  ],
  "maxReferrersPerDomain": 500,
  "minAuthority": 0,
  "maxItems": 500
}
```

## Output

```json
{
  "domain": {
    "label": "Domain",
    "format": "text"
  },
  "position": {
    "label": "#",
    "format": "number"
  },
  "referringDomain": {
    "label": "Referring domain",
    "format": "text"
  },
  "referringDomainAuthority": {
    "label": "Its Open Authority",
    "format": "number"
  },
  "referringDomainRank": {
    "label": "Its link rank (CC)",
    "format": "number"
  },
  "referringDomains": {
    "label": "Referring domains in total",
    "format": "number"
  },
  "ccRelease": {
    "label": "Graph release",
    "format": "text"
  }
}
```

## How it works

### 1. Sign up on Apify or log in

The Backlink Checker - Referring Domains in Bulk, Open Data Actor is ready to run with the inputs already set for "Backlinks API: referring domains of any site as JSON". [Sign up or log in](https://console.apify.com/create-task-from-example/f7TLuzhevVCuVbXEh) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Backlinks API: referring domains of any site as JSON" task

The Backlink Checker - Referring Domains in Bulk, Open Data Actor will start running based on the input automatically. You can also change all the input fields, like domains, referring domains per domain, and more, to match your specific use case.

### 3. Receive the "Backlinks API: referring domains of any site as JSON" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as domain, #, referring domain, and more.

### 4. Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also [run the "Backlinks API: referring domains of any site as JSON" task via API](https://apify.com/crawlplant/referring-domains-checker.md).

## About this Actor

This example demonstrates how to use [Backlink Checker - Referring Domains in Bulk, Open Data](https://apify.com/crawlplant/referring-domains-checker.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/crawlplant/referring-domains-checker.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/crawlplant/referring-domains-checker.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`).