> **For coding agents and LLMs:** This is one Social Fetch marketing page (markdown export). For API orientation start with [`/llms.txt`](https://www.socialfetch.dev/llms.txt); for auth and crawl rules use [`/agents.txt`](https://www.socialfetch.dev/agents.txt); for every operation use [`/llms-endpoints.txt`](https://www.socialfetch.dev/llms-endpoints.txt).

## This page

- **On-site (HTML):** <https://www.socialfetch.dev/platforms/stack-overflow/posts-postid-revisions>
- **Markdown (.mdx) URL:** <https://www.socialfetch.dev/platforms/stack-overflow/posts-postid-revisions.mdx>

---

# Stack Overflow Revisions API

Every version of a question or answer, with who changed it, when, and the text on either side.

`GET /v1/stack-overflow/posts/{postId}/revisions` returns the edit history of a post, newest first, up to 100 per page. Each revision has `guid`, `number`, `type` (`single_user` or `vote_based`), `postId`, `postType`, `createdAt`, `author`, `comment` (the edit summary as plain text; markup on bounty and bot rows is stripped), `isRollback`, `setCommunityWiki`, `title`, `tags`, `bodyHtml`, `previousTitle`, `previousTags` and `previousBodyHtml`.

A rollback and a close or lock are `vote_based` and can have no single author, so `author` is null there. A post that does not exist is `not_found`. Page with `page.nextCursor` while `page.hasMore` is true, and check `limitReached` on a list that stops at the ceiling.

## Request

- **Endpoint:** `GET /v1/stack-overflow/posts/{postId}/revisions`
- **Credits:** 1 credit
Failed requests are free
- **Input:** by post id
- **Full reference:** [docs](https://www.socialfetch.dev/docs/api/v1/stack-overflow/posts/postid/revisions/get)
- **Platform page:** [/platforms/stack-overflow](https://www.socialfetch.dev/platforms/stack-overflow)

## FAQ

### Can I see what the post said before an edit?

Yes. Each revision carries previousBodyHtml, previousTitle and previousTags beside the post-edit bodyHtml, title and tags.

### How many credits does a revisions page 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. Each paginated page is a separate billed request.

### Why is a revision's author null?

A vote_based revision, such as a rollback or a close, has no single author. single_user revisions name the editor in author.

### Does it work for answers?

Yes. Pass an answer id as postId. read postType to see whether the revision belongs to a question or an answer; title and tags are empty for answers.