APIs / Social media / Substack

1 credit per call4 endpoints

Substack API

Get Substack data as structured JSON with one API key: comments, post, posts and publication. Free credits every month.

Substack
GET/v1/substack/posts?publication=slowboring&sort=new&offset=0&limit=2
curl "https://api.perceptlayer.com/v1/substack/posts?publication=slowboring&sort=new&offset=0&limit=2" \
  -H "X-API-Key: $API_KEY"
cURL1 credit per successful call
Run this call below or from your dashboard to see a live response.

Playground

Run this API

cURLshell
curl "https://api.perceptlayer.com/v1/substack/posts?publication=slowboring&sort=new&offset=0&limit=2" \
  -H "X-API-Key: $API_KEY"

Substack · 4 endpoints

Endpoints

Every endpoint takes the same key. Open one for its parameters and an example request.

Note
Endpoints marked “Needs terms” return personal or social data. They work once you accept the restricted-endpoint terms in your dashboard.
EndpointWhat it returnsCost
GET/v1/substack/commentsComments Needs terms1 credit
GET/v1/substack/postPost Needs terms1 credit
GET/v1/substack/postsPosts Needs terms1 credit
GET/v1/substack/publicationPublication Needs terms1 credit

Overview

About the Substack API

What you can get

The Substack API returns comments, post, posts and publication as clean JSON. Each successful call costs one credit, and calls that fail are free.

Social mediaJSONRESTMCPSome endpoints need terms

More social media APIs

Use cases

Monitor mentions of your brand

Use the Substack API to monitor mentions of your brand

Find and vet creators

Use the Substack API to find and vet creators

Track trends and engagement over time

Use the Substack API to track trends and engagement over time

FAQ

Questions

How much does the Substack API cost?

Each successful call costs one credit. New accounts get free credits every month, and credit packs bring the price down as you scale.

What format are responses in?

Every endpoint returns JSON, with no HTML parsing on your side.

Do I need a separate key for Substack?

No. One key works for every API in the catalogue.

Try the Substack API with 1,000 free credits

No credit card. Failed calls are never billed.