May 27, 2026

Reddit client id: setup guide for API automation

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 min
Aymeric Zhuo
Aymeric Zhuo

Reddit client ID: the setup guide for API automation

Every Reddit automation begins with a single credential: the Reddit client ID. It's the first key you need to unlock Reddit's API. Reddit recorded over 1.7 billion monthly unique visitors in late 2024 (Semrush, 2024), and the platform's API serves millions of developer requests daily. If you're building automation around Reddit data on CodeWords, that client ID is what connects your workflow to all of it.

Unlike generic AI automation posts, this guide shows real CodeWords workflows — not just theory.

TL;DR

  • A Reddit client ID is a public identifier you get by registering an app at reddit.com/prefs/apps
  • You need both a client ID and a client secret for OAuth-based API access
  • CodeWords can use your Reddit credentials to automate subreddit monitoring, posting, and data extraction

How do you register a Reddit app and get your client ID?

Log into Reddit, navigate to reddit.com/prefs/apps, scroll down and click "create another app...", fill in the form (name, app type, redirect URI), and click "create app". Your Reddit client ID appears directly under the app name — it's the short alphanumeric string.

Which app type should you choose?

Script apps are simplest — use password-based OAuth and work well for personal automations. Web apps use the standard authorization code flow for multi-user applications. Installed apps skip the client secret entirely and use PKCE for mobile/desktop apps. For most automation use cases on CodeWords, the script type is the right choice.

How do you authenticate API requests with your client ID?

Send a POST to https://www.reddit.com/api/v1/access_token with Basic auth (client ID as username, client secret as password), the body grant_type=password&username=REDDIT_USER&password=REDDIT_PASS, and a descriptive User-Agent header. The response returns an access_token valid for one hour to use as a Bearer token.

How can you automate Reddit tasks on CodeWords?

  • Subreddit monitoring: Scheduled workflow that polls subreddits for posts matching keywords, routes results to Slack or Airtable
  • Sentiment analysis: Pull thread comments, process through an LLM, store structured results
  • Automated posting: Schedule content posts using CodeWords' cron-based scheduling
  • Cross-platform syndication: Monitor Reddit for trending topics, generate AI-drafted responses, publish across channels

FAQ

Does the Reddit client ID expire?
No. The client ID and secret persist until you manually delete the app. Access tokens expire after one hour and need refreshing.

Is there a cost to using the Reddit API?
Free-tier access exists for non-commercial use within rate limits. Most automation workflows fall within the free tier.

Build your first Reddit workflow on CodeWords →

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