Substack Restackers API
The people who restacked a post, up to Substack's restacker cap, with their public profile details.
GET /v1/substack/posts/{post}/restackers1 credit Failed requests are free
About this endpoint
GET /v1/substack/posts/{post}/restackers lists the people who restacked a post. The post is a numeric id or a canonical post URL. data.postId names the post.
data.restackers[] carries id, name, photoUrl, bestsellerTier, badges and a primaryPublication summary with id, name and subdomain. Substack caps this list at about 96 restackers per post, so a list at that limit sets truncated to true. lookupStatus is found or not_found.
Substack Restackers API FAQ
How is a restack different from a reaction?
A reaction is an emoji on the post. A restack shares the post into the reader's own feed. The two lists are separate.
What is in a restacker row?
The reader's numeric id, display name, photo and badges, plus the publication Substack marks as their primary one.
How many restackers can I get?
Substack caps this list at about 96 restackers per post. A list at that limit sets truncated to true.
How many credits does a restackers lookup cost?
Pricing is documented on the operation in the API registry (shown on this page). Confirm on every response with meta.creditsCharged: that field is the billing source of truth.
Other Substack endpoints
- PublicationGET /v1/substack/publications/{publication}
- PostsGET /v1/substack/publications/{publication}/posts
- Post bodiesGET /v1/substack/publications/{publication}/posts/bodies
- Post indexGET /v1/substack/publications/{publication}/posts/index
- Search postsGET /v1/substack/publications/{publication}/posts/search
- RecommendationsGET /v1/substack/publications/{publication}/recommendations
- Publication feedGET /v1/substack/publications/{publication}/feed
- PostGET /v1/substack/posts/{post}