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One API Call to Post on Reddit

The Reddit API requires OAuth app registration, subreddit-specific rules enforcement, and aggressive rate limiting with strict user-agent requirements. RelayAPI handles OAuth, rate limits, media hosting, and API changes.

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POST /v1/posts
const res = await fetch("https:">//api.relayapi.dev/v1/posts", {
  method: "POST",
  headers: {
    Authorization: "Bearer rlay_live_xxxx",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    content: "Check out our latest update!",
    platforms: ["reddit"],
    media: ["https:">//cdn.example.com/image.jpg"],
  }),
});

Reddit API

  • OAuth app registration requires manual approval for higher rate limits, and user-agent strings must follow a specific format
  • Each subreddit has different posting rules (flair requirements, title formats, link vs self-post restrictions) that the API doesn't validate upfront
  • Rate limits are strict (100 requests per minute for OAuth apps) and exceed penalties can result in temporary bans
  • Media uploads use a separate endpoint and require polling for processing completion before referencing in posts
  • Reddit's API documentation is inconsistent, with undocumented endpoints and behavior differences between old and new Reddit

RelayAPI

  • RelayAPI manages OAuth credentials, user-agent formatting, and rate tier optimization automatically
  • We validate posts against subreddit rules before submission, preventing silent failures and moderator removals
  • Intelligent rate limit tracking with request queuing, backoff, and per-account usage monitoring
  • Upload media to RelayAPI and we handle the upload endpoint, processing wait, and post attachment seamlessly
  • Our integration is tested against actual Reddit behavior, not just documentation, ensuring reliable posting
Save 3+ hours of development time

Supported content types

Text PostsLink PostsImagesVideosPollsCrossposts

How it works

1

Connect your account

Authorize your Reddit account via OAuth in about 30 seconds.

2

Build your integration

Use the REST API or our SDKs to publish content from your stack.

3

We handle the rest

RelayAPI manages publishing, rate limits, and delivery notifications.

Ship Faster

Submit Reddit posts with a single API call. No subreddit rule lookups, no media processing polls, no user-agent formatting. Specify the subreddit, content type, and post body -- we handle the rest.

Official API, Zero Hassle

RelayAPI uses the official Reddit API. Your posts appear natively in subreddits with full voting and commenting, while we handle OAuth, rate limits, and subreddit rule validation.

Subreddit Rule Validation

Reddit silently removes posts that violate subreddit rules. RelayAPI pre-validates your posts against flair requirements, title formats, and content restrictions before submission.

Frequently asked questions

Do I need a Reddit account to post through RelayAPI?

Yes. You connect your Reddit account through our OAuth flow. Posts are submitted under your Reddit username, and you must have sufficient karma and account age to post in most subreddits.

What content types can I submit to Reddit through RelayAPI?

RelayAPI supports text posts (self-posts), link posts, image posts (single or gallery), video posts, polls, and crossposts. Each with automatic flair detection and subreddit rule validation.

How does RelayAPI handle subreddit-specific rules?

We fetch and cache subreddit rules, then validate your post before submission. This includes flair requirements, title format rules, allowed domains, content type restrictions, and posting frequency limits.

Can I post to multiple subreddits at once?

Yes, but be aware that Reddit discourages spam-like cross-posting. RelayAPI supports multi-subreddit posting with appropriate delays and uses native crosspost functionality where possible to stay within Reddit's guidelines.

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Join developers who chose RelayAPI over wiring up Reddit API by hand.

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