# Substack AI, LLM & Tech Newsletter Sponsorship & Author Emails

**Use case:** 

Find fast-growing AI and developer Substack newsletters with author emails, custom domains, and sponsorship links.

## Input

```json
{
  "searchQueries": [
    "AI agents",
    "machine learning"
  ],
  "publications": [],
  "maxNewslettersPerQuery": 10,
  "crawlAboutAndSocials": true,
  "includeRecentPosts": true,
  "onlyWithEmail": false,
  "proxyConfiguration": {
    "useApifyProxy": false
  }
}
```

## Output

```json
{
  "publicationName": {
    "label": "Newsletter Name",
    "format": "string"
  },
  "authorName": {
    "label": "Author Name",
    "format": "string"
  },
  "primaryEmail": {
    "label": "Primary Contact Email",
    "format": "string"
  },
  "emails": {
    "label": "All Contact Emails",
    "format": "array"
  },
  "subscriberCountEstimate": {
    "label": "Subscriber Scale",
    "format": "string"
  },
  "bestsellerTier": {
    "label": "Bestseller Tier",
    "format": "integer"
  },
  "paidSubscriptionsEnabled": {
    "label": "Paid Tier Enabled",
    "format": "boolean"
  },
  "customDomain": {
    "label": "Custom Domain",
    "format": "string"
  },
  "sponsorshipUrl": {
    "label": "Sponsor / Media Kit URL",
    "format": "string"
  },
  "publicationUrl": {
    "label": "Newsletter URL",
    "format": "string"
  }
}
```

## How it works

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

The Substack Newsletter, Author & Sponsor Leads Scraper (B2B) Actor is ready to run with the inputs already set for "Substack AI, LLM & Tech Newsletter Sponsorship & Author Emails". [Sign up or log in](https://console.apify.com/create-task-from-example/fwcDq4ff4s2p1OG2C) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Substack AI, LLM & Tech Newsletter Sponsorship & Author Emails" task

The Substack Newsletter, Author & Sponsor Leads Scraper (B2B) Actor will start running based on the input automatically. You can also change all the input fields, like niche / topic search keywords, specific substack urls or subdomains (optional), and more, to match your specific use case.

### 3. Receive the "Substack AI, LLM & Tech Newsletter Sponsorship & Author Emails" 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 name, author name, primary contact email, 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 "Substack AI, LLM & Tech Newsletter Sponsorship & Author Emails" task via API](https://apify.com/church_of_loujess/substack-newsletter-leads-scraper.md).

## About this Actor

This example demonstrates how to use [Substack Newsletter, Author & Sponsor Leads Scraper (B2B)](https://apify.com/church_of_loujess/substack-newsletter-leads-scraper.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/church_of_loujess/substack-newsletter-leads-scraper.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/church_of_loujess/substack-newsletter-leads-scraper.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`).