# Substack Posts — Public Feed by Newsletter Slug (`v0iddo/substack-newsletter-posts`) Actor Pull Substack newsletter posts via the public {slug}.substack.com/feed RSS endpoint. One row per post with title, link, author, pubDate, summary, category. No auth required. - **URL**: https://apify.com/v0iddo/substack-newsletter-posts.md - **Developed by:** [vøiddo](https://apify.com/v0iddo) (community) - **Categories:** Business - **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, NaN bookmarks - **User rating**: No ratings yet ## Pricing Pay per usage This Actor is paid per platform usage. The Actor is free to use, and you only pay for the Apify platform usage, which gets cheaper the higher subscription plan you have. Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-usage ## What's an Apify Actor? Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases. In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours, and optionally produces a well-defined JSON output, datasets with results, or files in key-value store. In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server. Actors are written with capital "A". ## 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. The best way to integrate Actors is as follows. In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js.md): ```bash npm install apify-client ``` In Python projects, use official [Python client library](https://docs.apify.com/api/client/python.md): ```bash pip install apify-client ``` In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md): ````bash # MacOS / Linux curl -fsSL https://apify.com/install-cli.sh | bash # Windows irm https://apify.com/install-cli.ps1 | iex ```bash In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/platform/integrations/mcp.md). If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md). For usage examples, see the [API](#api) section below. 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). # README ## Substack Newsletter Posts Scraper — RSS by Slug Pull Substack newsletter posts via the public `{slug}.substack.com/feed` RSS endpoint. One row per post — title, link, author, pubDate, summary. No authentication required. ### Example output row ```json { "id": "https://lennysnewsletter.substack.com/p/the-source-of-amazons-success", "title": "The source of Amazon's success", "link": "https://lennysnewsletter.substack.com/p/the-source-of-amazons-success", "author": "Lenny Rachitsky", "pubDate": "Sun, 01 Jun 2025 12:00:00 +0000", "summary": "A deep dive into the leadership principles that made Amazon dominant..." } ```` ### How to use Provide a list of Substack newsletter slugs (the subdomain part of `.substack.com`): ```json { "newsletters": ["lennysnewsletter", "stratechery", "astralcodexten"], "maxPostsPerNewsletter": 25 } ``` | Field | Type | Default | Description | |---|---|---|---| | `newsletters` | `string[]` | `["lennysnewsletter","stratechery","astralcodexten"]` | Newsletter slugs to fetch | | `maxPostsPerNewsletter` | `integer` | `25` | Maximum posts to return per newsletter | Paywalled newsletters still return titles and summaries via RSS — full body text requires a paid subscription outside this actor. ### Pricing | Event | Cost | |---|---| | `post_extracted` — one Substack newsletter post row in the dataset | **$0.0002** | A run fetching 25 posts × 20 newsletters = 500 rows → **$0.10**. ### Buyer - Content researchers and media analysts monitoring Substack's growing creator ecosystem. - Newsletter aggregators building reading dashboards or digests across dozens of publications. - Competitive intelligence teams tracking what top thought-leaders in tech, finance, and AI are publishing. - Marketing teams doing share-of-voice analysis across influential newsletters. - Developers building read-later or newsletter-discovery apps who need structured post metadata. ### Source Data is fetched directly from Substack's public RSS endpoint: ``` https://{slug}.substack.com/feed ``` No API key or account required. The feed returns the most recent posts for the newsletter. Slugs that return HTTP 404 are logged and skipped (newsletter closed or renamed). # Actor input Schema ## `newsletters` (type: `array`): Substack newsletter slugs (the subdomain in .substack.com) ## `maxPostsPerNewsletter` (type: `integer`): Cap posts per newsletter ## Actor input object example ```json { "newsletters": [ "lennysnewsletter", "stratechery", "astralcodexten" ], "maxPostsPerNewsletter": 25 } ``` # API You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup. ## JavaScript example ```javascript import { ApifyClient } from 'apify-client'; // Initialize the ApifyClient with your Apify API token // Replace the '' with your token const client = new ApifyClient({ token: '', }); // Prepare Actor input const input = { "newsletters": [ "lennysnewsletter", "stratechery", "astralcodexten" ] }; // Run the Actor and wait for it to finish const run = await client.actor("v0iddo/substack-newsletter-posts").call(input); // Fetch and print Actor results from the run's dataset (if any) console.log('Results from dataset'); console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`); const { items } = await client.dataset(run.defaultDatasetId).listItems(); items.forEach((item) => { console.dir(item); }); // 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs ``` ## Python example ```python from apify_client import ApifyClient # Initialize the ApifyClient with your Apify API token # Replace '' with your token. client = ApifyClient("") # Prepare the Actor input run_input = { "newsletters": [ "lennysnewsletter", "stratechery", "astralcodexten", ] } # Run the Actor and wait for it to finish run = client.actor("v0iddo/substack-newsletter-posts").call(run_input=run_input) # Fetch and print Actor results from the run's dataset (if there are any) print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"]) for item in client.dataset(run["defaultDatasetId"]).iterate_items(): print(item) # 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start ``` ## CLI example ```bash echo '{ "newsletters": [ "lennysnewsletter", "stratechery", "astralcodexten" ] }' | apify call v0iddo/substack-newsletter-posts --silent --output-dataset ``` ## MCP server setup ```json { "mcpServers": { "apify": { "command": "npx", "args": [ "mcp-remote", "https://mcp.apify.com/?tools=v0iddo/substack-newsletter-posts", "--header", "Authorization: Bearer " ] } } } ``` ## OpenAPI specification ```json { "openapi": "3.0.1", "info": { "title": "Substack Posts — Public Feed by Newsletter Slug", "description": "Pull Substack newsletter posts via the public {slug}.substack.com/feed RSS endpoint. One row per post with title, link, author, pubDate, summary, category. No auth required.", "version": "0.1", "x-build-id": "cp5pWdDtvQ9hCi1oa" }, "servers": [ { "url": "https://api.apify.com/v2" } ], "paths": { "/acts/v0iddo~substack-newsletter-posts/run-sync-get-dataset-items": { "post": { "operationId": "run-sync-get-dataset-items-v0iddo-substack-newsletter-posts", "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": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } }, "/acts/v0iddo~substack-newsletter-posts/runs": { "post": { "operationId": "runs-sync-v0iddo-substack-newsletter-posts", "x-openai-isConsequential": false, "summary": "Executes an Actor and returns information about the initiated run in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$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": { "$ref": "#/components/schemas/runsResponseSchema" } } } } } } }, "/acts/v0iddo~substack-newsletter-posts/run-sync": { "post": { "operationId": "run-sync-v0iddo-substack-newsletter-posts", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$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": { "newsletters": { "title": "newsletters", "type": "array", "description": "Substack newsletter slugs (the subdomain in .substack.com)", "default": [], "items": { "type": "string" } }, "maxPostsPerNewsletter": { "title": "maxPostsPerNewsletter", "type": "integer", "description": "Cap posts per newsletter", "default": 25 } } }, "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 } } }, "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 } } } } } } } } } } ```