Pricing

from $3.00 / 1,000 dataset items

Try for free

Go to Apify Store

Substack Newsletter Finder & Lead Generator

Try for free

Find Substack newsletters by keyword, category or bestseller leaderboard and get sponsor-ready leads: author, subscriber count, bestseller tier, paid-plan prices and social links (X, LinkedIn, Instagram, YouTube). Filter by size, language, paid. Pay only per newsletter.

Pricing

from $3.00 / 1,000 dataset items

Rating

0.0

(0)

Developer

axly

Actor stats

Bookmarked

Total users

Monthly active users

3 days ago

Last modified

Categories

Lead generation

Social media

News

You can access the Substack Newsletter Finder & Lead Generator programmatically from your own applications by using the Apify API. You can also choose the language preference from below. To use the Apify API, you’ll need an Apify account and your API token, found in API & Integrations in Apify Console.

Python

JavaScript

CLI

OpenAPI

HTTP

MCP

{
  "openapi": "3.0.1",
  "info": {
    "version": "1.0",
    "x-build-id": "yRgeXqeVKmvsNjow7"
  },
  "servers": [
    {
      "url": "https://api.apify.com/v2"
    }
  ],
  "paths": {
    "/acts/axlymxp~substack-newsletter-lead-finder/run-sync-get-dataset-items": {
      "post": {
        "operationId": "run-sync-get-dataset-items-axlymxp-substack-newsletter-lead-finder",
        "x-openai-isConsequential": false,
        "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.",
        "tags": [
          "Run Actor"
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/inputSchema"
              }
            }
          }
        },
        "parameters": [
          {
            "name": "token",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            },
            "description": "Enter your Apify token here"
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          }
        }
      }
    },
    "/acts/axlymxp~substack-newsletter-lead-finder/runs": {
      "post": {
        "operationId": "runs-sync-axlymxp-substack-newsletter-lead-finder",
        "x-openai-isConsequential": false,
        "summary": "Executes an Actor and returns information about the initiated run in response.",
        "tags": [
          "Run Actor"
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/inputSchema"
              }
            }
          }
        },
        "parameters": [
          {
            "name": "token",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            },
            "description": "Enter your Apify token here"
          }
        ],
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/runsResponseSchema"
                }
              }
            }
          }
        }
      }
    },
    "/acts/axlymxp~substack-newsletter-lead-finder/run-sync": {
      "post": {
        "operationId": "run-sync-axlymxp-substack-newsletter-lead-finder",
        "x-openai-isConsequential": false,
        "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.",
        "tags": [
          "Run Actor"
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/inputSchema"
              }
            }
          }
        },
        "parameters": [
          {
            "name": "token",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            },
            "description": "Enter your Apify token here"
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "inputSchema": {
        "type": "object",
        "properties": {
          "searchQueries": {
            "title": "Keywords",
            "type": "array",
            "description": "Find newsletters matching these keywords (niche, topic or name). One search per line.",
            "items": {
              "type": "string"
            }
          },
          "categories": {
            "title": "Categories",
            "type": "array",
            "description": "Substack categories to pull newsletters from.",
            "items": {
              "type": "string",
              "enum": [
                "culture",
                "technology",
                "business",
                "us-politics",
                "finance",
                "food",
                "podcast",
                "sports",
                "art",
                "world-politics",
                "health-politics",
                "news",
                "fashionandbeauty",
                "music",
                "faith",
                "climate",
                "science",
                "literature",
                "fiction",
                "health",
                "design",
                "travel",
                "parenting",
                "philosophy",
                "comics",
                "international",
                "crypto",
                "history",
                "humor",
                "education",
                "film-and-tv",
                "home-garden",
                "games"
              ],
              "enumTitles": [
                "Culture",
                "Technology",
                "Business",
                "U.S. Politics",
                "Finance",
                "Food & Drink",
                "Podcasts",
                "Sports",
                "Art & Illustration",
                "World Politics",
                "Health Politics",
                "News",
                "Fashion & Beauty",
                "Music",
                "Faith & Spirituality",
                "Climate & Environment",
                "Science",
                "Literature",
                "Fiction",
                "Health & Wellness",
                "Design",
                "Travel",
                "Parenting",
                "Philosophy",
                "Comics",
                "International",
                "Crypto",
                "History",
                "Humor",
                "Education",
                "Film & TV",
                "Home & Garden",
                "Games"
              ]
            }
          },
          "categorySource": {
            "title": "Category listing",
            "enum": [
              "bestsellers",
              "trending",
              "all"
            ],
            "type": "string",
            "description": "Which list to read for each category: Substack's paid Bestsellers leaderboard (ranked), the Rising/Trending leaderboard (ranked), or every newsletter Substack lists in the category.",
            "default": "bestsellers"
          },
          "publicationUrls": {
            "title": "Newsletter URLs",
            "type": "array",
            "description": "Enrich specific newsletters: subdomain (`astralcodexten`), `*.substack.com` URL or custom domain.",
            "items": {
              "type": "string"
            }
          },
          "includeAuthorProfile": {
            "title": "Include author socials & audience",
            "type": "boolean",
            "description": "Fetch the author's profile: social links (X/Twitter, LinkedIn, Instagram, YouTube, TikTok, Bluesky, website), follower count and subscriber count. One extra request per newsletter.",
            "default": true
          },
          "includeRecommendations": {
            "title": "Include recommendation network",
            "type": "boolean",
            "description": "List the newsletters each result recommends (great for mapping a niche and finding more leads).",
            "default": false
          },
          "minSubscribers": {
            "title": "Minimum subscribers",
            "minimum": 0,
            "type": "integer",
            "description": "Skip newsletters with fewer subscribers than this. 0 = no minimum.",
            "default": 0
          },
          "paidOnly": {
            "title": "Paid newsletters only",
            "type": "boolean",
            "description": "Only keep newsletters that sell paid subscriptions.",
            "default": false
          },
          "languages": {
            "title": "Languages",
            "type": "array",
            "description": "Only keep newsletters in these language codes, e.g. en, es, de. Empty = all.",
            "items": {
              "type": "string"
            }
          },
          "maxResultsPerSource": {
            "title": "Max newsletters per keyword / category",
            "minimum": 0,
            "type": "integer",
            "description": "Cap per keyword or category. 0 = no cap.",
            "default": 100
          },
          "maxItems": {
            "title": "Max total newsletters",
            "minimum": 0,
            "type": "integer",
            "description": "Stop after this many newsletters. 0 = no limit.",
            "default": 200
          },
          "proxyConfiguration": {
            "title": "Proxy",
            "type": "object",
            "description": "Substack's newsletter keyword search returns nothing to cloud-server IPs, so keyword searches are routed through Apify Proxy (datacenter is enough). Other requests go direct.",
            "default": {
              "useApifyProxy": true
            }
          }
        }
      },
      "runsResponseSchema": {
        "type": "object",
        "properties": {
          "data": {
            "type": "object",
            "properties": {
              "id": {
                "type": "string"
              },
              "actId": {
                "type": "string"
              },
              "userId": {
                "type": "string"
              },
              "startedAt": {
                "type": "string",
                "format": "date-time",
                "example": "2025-01-08T00:00:00.000Z"
              },
              "finishedAt": {
                "type": "string",
                "format": "date-time",
                "example": "2025-01-08T00:00:00.000Z"
              },
              "status": {
                "type": "string",
                "example": "READY"
              },
              "meta": {
                "type": "object",
                "properties": {
                  "origin": {
                    "type": "string",
                    "example": "API"
                  },
                  "userAgent": {
                    "type": "string"
                  }
                }
              },
              "stats": {
                "type": "object",
                "properties": {
                  "inputBodyLen": {
                    "type": "integer",
                    "example": 2000
                  },
                  "rebootCount": {
                    "type": "integer",
                    "example": 0
                  },
                  "restartCount": {
                    "type": "integer",
                    "example": 0
                  },
                  "resurrectCount": {
                    "type": "integer",
                    "example": 0
                  },
                  "computeUnits": {
                    "type": "integer",
                    "example": 0
                  }
                }
              },
              "options": {
                "type": "object",
                "properties": {
                  "build": {
                    "type": "string",
                    "example": "latest"
                  },
                  "timeoutSecs": {
                    "type": "integer",
                    "example": 300
                  },
                  "memoryMbytes": {
                    "type": "integer",
                    "example": 1024
                  },
                  "diskMbytes": {
                    "type": "integer",
                    "example": 2048
                  }
                }
              },
              "buildId": {
                "type": "string"
              },
              "defaultKeyValueStoreId": {
                "type": "string"
              },
              "defaultDatasetId": {
                "type": "string"
              },
              "defaultRequestQueueId": {
                "type": "string"
              },
              "buildNumber": {
                "type": "string",
                "example": "1.0.0"
              },
              "containerUrl": {
                "type": "string"
              },
              "usage": {
                "type": "object",
                "properties": {
                  "ACTOR_COMPUTE_UNITS": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATASET_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATASET_WRITES": {
                    "type": "integer",
                    "example": 0
                  },
                  "KEY_VALUE_STORE_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "KEY_VALUE_STORE_WRITES": {
                    "type": "integer",
                    "example": 1
                  },
                  "KEY_VALUE_STORE_LISTS": {
                    "type": "integer",
                    "example": 0
                  },
                  "REQUEST_QUEUE_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "REQUEST_QUEUE_WRITES": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATA_TRANSFER_INTERNAL_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATA_TRANSFER_EXTERNAL_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_SERPS": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_UNBLOCKER_UNITS": {
                    "type": "integer",
                    "example": 0
                  }
                }
              },
              "usageTotalUsd": {
                "type": "number",
                "example": 0.00005
              },
              "usageUsd": {
                "type": "object",
                "properties": {
                  "ACTOR_COMPUTE_UNITS": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATASET_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATASET_WRITES": {
                    "type": "integer",
                    "example": 0
                  },
                  "KEY_VALUE_STORE_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "KEY_VALUE_STORE_WRITES": {
                    "type": "number",
                    "example": 0.00005
                  },
                  "KEY_VALUE_STORE_LISTS": {
                    "type": "integer",
                    "example": 0
                  },
                  "REQUEST_QUEUE_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "REQUEST_QUEUE_WRITES": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATA_TRANSFER_INTERNAL_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATA_TRANSFER_EXTERNAL_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_SERPS": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_UNBLOCKER_UNITS": {
                    "type": "integer",
                    "example": 0
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

Substack Newsletter Finder – Leads, Subscribers & Socials OpenAPI definition

OpenAPI is a standard for designing and describing RESTful APIs, allowing developers to define API structure, endpoints, and data formats in a machine-readable way. It simplifies API development, integration, and documentation.

OpenAPI is effective when used with AI agents and GPTs by standardizing how these systems interact with various APIs, for reliable integrations and efficient communication.

By defining machine-readable API specifications, OpenAPI allows AI models like GPTs to understand and use varied data sources, improving accuracy. This accelerates development, reduces errors, and provides context-aware responses, making OpenAPI a core component for AI applications.

You can download the OpenAPI definitions for Substack Newsletter Finder & Lead Generator from the options below:

OpenAPI.json

If you’d like to learn more about how OpenAPI powers GPTs, read our blog post.

You can also check out our other API clients:

Substack Newsletter Finder & Lead Generator API in Python

Substack Newsletter Finder & Lead Generator API in JavaScript

Substack Newsletter Finder & Lead Generator API through CLI

Substack Newsletter Finder & Lead Generator API

Substack Newsletter Scraper · Find Active Newsletters + Leads

thequietstack/substack-scraper

Find Substack newsletters by keyword or category and qualify them in one row: subscriber figure, paid-subscriber band, bestseller tier, paid price, last post date, posts per 30/90 days, median likes and comments. Optional post rows. No login.

TheQuietStack

Substack Newsletter Scraper

romy/substack-newsletter-scraper

Substack Newsletter Scraper extracts newsletter metadata and recent posts from Substack the leading platform for independent writers and paid newsletters. Search by keyword or browse top newsletters by category. No login required

Romy

Substack Newsletter Author Lead Scraper

meticulous_snail/substack-newsletter-leads

Find Substack newsletter authors by topic and subscriber tier. Extract author name, newsletter name, category, subscriber signals, website, and social links. Perfect for newsletter sponsorship, media outreach, and content creator partnerships.

Beatsync Pro

Substack Scraper - Posts, Subscribers & Paid Plan Prices

cirkit/substack-newsletter-scraper

Scrape any Substack newsletter archive: post title, subtitle, date, full text, paywall state, likes, restacks and comment counts, plus the publication's subscriber size, paid plan prices and bestseller tier. Custom domains supported. No login, one flat price.

Crikit

Substack Publications & Newsletters Scraper

scrapers_lat/substack-publications-scraper

Scrape Substack category leaderboards for ranked publications and newsletters with author, category, leaderboard rank, bestseller tier, paid status, subscriber signal, subscription pricing, description, socials and links. Export to JSON, CSV or Excel.

Scrapers Lat

Substack Newsletter Scraper

spry_frame/substack-scraper

Scrape Substack newsletter listings by category or keyword — name, description, subscriber pricing, domain, language, podcast status, and more. No login required.

COSENT GROUP

Substack Newsletter Scraper

dataharvest/substack-scraper

Scrape Substack newsletters, posts and comments.

Alex v

Substack Newsletter Scraper

red.cars/substack-newsletter-scraper

Extract newsletter content, subscriber data, and author insights from any Substack publication - no API key required!

AutomateLab

1.0

Substack Newsletter Scraper

digispruce/substack-scraper

Extract comprehensive Substack newsletter data including author profiles, subscriber counts, social media links, and contact information for B2B outreach and market research.

Akram

121

4.0

Substack Newsletter Posts, Dates and Engagement

usta/substack-posts

Substack scraper, Substack posts scraper, newsletter monitoring: give a list of Substack publications and get one row per public post with title, date, free-or-paid flag, reactions, comments and word count.