# Which Newsletters in a Niche Run Sponsorships

**Use case:** 

Scan three newsletters in one niche to see which of them run sponsorships, and which advertisers show up in more than one, with domain and dates.

## Input

```json
{
  "newsletterUrls": [
    "https://astralcodexten.substack.com",
    "https://www.noahpinion.blog",
    "https://www.slowboring.com"
  ],
  "maxPostsPerNewsletter": 25
}
```

## Output

```json
{
  "sponsorName": {
    "label": "Sponsor",
    "format": "string"
  },
  "sponsorDomain": {
    "label": "Domain",
    "format": "string"
  },
  "sponsorUrl": {
    "label": "URL",
    "format": "string"
  },
  "totalMentions": {
    "label": "Mentions",
    "format": "integer"
  },
  "newslettersSponsored": {
    "label": "Newsletters",
    "format": "integer"
  },
  "firstSeenAt": {
    "label": "First seen",
    "format": "string"
  },
  "lastSeenAt": {
    "label": "Last seen",
    "format": "string"
  },
  "sampleContext": {
    "label": "Sample context",
    "format": "string"
  }
}
```

## About this Actor

This example demonstrates how to use [Newsletter Sponsor Finder — Substack Scraper](https://apify.com/davidbenittah/newsletter-sponsor-finder) with a specific input configuration. Visit the [Actor detail page](https://apify.com/davidbenittah/newsletter-sponsor-finder) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
This Task's input is already configured above — use it as-is rather than inventing a new one.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
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For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/davidbenittah/newsletter-sponsor-finder.md

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).