0n3
MCP servers · Reddit · MCP server

Connect Codex CLI to Reddit

One line gives Codex CLI your Reddit account as tools: 21 endpoints, posts, comments, subreddits, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.

Get the line for Codex CLIConnect Reddit first

Three steps

  1. Create a free 0n3 account and connect Reddit. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
  3. Ask Codex CLI: whoami. Then: "Submit post in Reddit".
Put the token in your environment
export ON3_TOKEN="<your 0n token>"

Add it to your shell profile so Codex finds it next time.

The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.

What Codex CLI can then do in Reddit

Posts · Submit text/link posts to subreddits and manage them5
Submit postPOST /api/submit
Get a postGET /r/{subreddit}/comments/{postId}
Get user postsGET /user/{username}/submitted
Post a commentPOST /api/comment
Search postsGET /search
Comments · Post comments and replies on Reddit threads2
Get commentsGET /r/{subreddit}/comments/{postId}
Get user commentsGET /user/{username}/comments
Subreddits · Browse and search subreddit info, rules, and hot/new/top posts7
Get a subredditGET /r/{subreddit}/about
Get subreddit rulesGET /r/{subreddit}/about/rules
Get a hotGET /r/{subreddit}/hot
Get a newGET /r/{subreddit}/new
Get a topGET /r/{subreddit}/top
Search subredditsGET /subreddits/search
List my subredditsGET /subreddits/mine/subscriber
Messages · Read and send private messages2
Get an inboxGET /message/inbox
Send a messagePOST /api/compose
Profile · View authenticated user profile, karma, and account age0
View authenticated user profile, karma, and account age
Search content · Search Reddit posts, comments, and subreddits0
Search Reddit posts, comments, and subreddits

All 21 Reddit endpoints →

Reddit in other AI clients

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