# Check a Substack newsletter before you sponsor it

**Use case:** 

To check a newsletter before buying a sponsorship, paste its link and turn on health signals, full pricing and homepage links. This example returns subscriber count, every plan with its currency, last post date and posts per month, payment and spam flags, and any sponsorship page.

## Input

```json
{
  "urls": [
    "https://www.thefp.com",
    "https://www.lennysnewsletter.com"
  ],
  "newsletterType": "all",
  "maxResults": 50,
  "includeActivityMetrics": true,
  "includeHomepageLinks": true,
  "includeRecommendations": false,
  "includeContributors": false,
  "includeFullPricing": true,
  "includeHealthSignals": true,
  "includeGuests": false,
  "concurrency": 5,
  "requestDelayMs": 0
}
```

## Output

```json
{
  "name": {
    "label": "Newsletter",
    "format": "string"
  },
  "authorName": {
    "label": "Author",
    "format": "string"
  },
  "authorHandle": {
    "label": "Handle",
    "format": "string"
  },
  "authorBio": {
    "label": "Bio",
    "format": "string"
  },
  "twitterHandle": {
    "label": "Twitter",
    "format": "string"
  },
  "subscriberCount": {
    "label": "Subscribers",
    "format": "string"
  },
  "subscriberCountEstimate": {
    "label": "Subs (est)",
    "format": "string"
  },
  "paidSubscriberDetail": {
    "label": "Paid Detail",
    "format": "string"
  },
  "bestsellerTier": {
    "label": "Tier",
    "format": "number"
  },
  "hasPaidSubscription": {
    "label": "Paid",
    "format": "boolean"
  },
  "monthlyPriceCents": {
    "label": "Monthly ¢",
    "format": "number"
  },
  "yearlyPriceCents": {
    "label": "Yearly ¢",
    "format": "number"
  },
  "estimatedPostsPerMonth": {
    "label": "Posts/Mo",
    "format": "number"
  },
  "lastPostDate": {
    "label": "Last Post",
    "format": "string"
  },
  "category": {
    "label": "Category",
    "format": "string"
  },
  "language": {
    "label": "Lang",
    "format": "string"
  },
  "hasPodcast": {
    "label": "Podcast",
    "format": "boolean"
  },
  "hasCommunity": {
    "label": "Community",
    "format": "boolean"
  },
  "description": {
    "label": "Description",
    "format": "string"
  },
  "url": {
    "label": "URL",
    "format": "string"
  },
  "substackUrl": {
    "label": "Substack URL",
    "format": "string"
  },
  "customDomain": {
    "label": "Custom Domain",
    "format": "string"
  },
  "logoUrl": {
    "label": "Logo",
    "format": "string"
  },
  "authorPhotoUrl": {
    "label": "Author Photo",
    "format": "string"
  },
  "websiteUrl": {
    "label": "Website",
    "format": "string"
  },
  "createdAt": {
    "label": "Created",
    "format": "string"
  }
}
```

## How it works

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

The Substack Lead Gen Scraper Actor is ready to run with the inputs already set for "Check a Substack newsletter before you sponsor it". [Sign up or log in](https://console.apify.com/create-task-from-example/Ck35cUeIK0nzeaAFG) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Check a Substack newsletter before you sponsor it" task

The Substack Lead Gen Scraper Actor will start running based on the input automatically. You can also change all the input fields, like newsletter, post or profile links, leaderboard, and more, to match your specific use case.

### 3. Receive the "Check a Substack newsletter before you sponsor it" 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 newsletter, author, handle, 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 "Check a Substack newsletter before you sponsor it" task via API](https://apify.com/sourabhbgp/substack-lead-gen.md).

## About this Actor

This example demonstrates how to use [Substack Lead Gen Scraper](https://apify.com/sourabhbgp/substack-lead-gen.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/sourabhbgp/substack-lead-gen.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/sourabhbgp/substack-lead-gen.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`).