Check subreddit existence
Check if a subreddit exists and return basic info (title, subscriber count, NSFW status, post types allowed). Uses Reddit's public JSON API (no Reddit auth needed). Returns `exists: false` for private, banned, or nonexistent subreddits.
API key authentication - use your Late API key as a Bearer token
In: header
Query Parameters
Subreddit name (with or without "r/" prefix)
Response Body
application/json
curl -X GET "https://getlate.dev/api/v1/tools/validate/subreddit?name=programming"{
"exists": true,
"subreddit": {
"name": "programming",
"title": "programming",
"description": "Computer Programming",
"subscribers": 6844284,
"isNSFW": true,
"type": "public",
"allowImages": true,
"allowVideos": true
}
}Validate post content POST
Dry-run the full post validation pipeline without publishing. Catches issues like missing media for Instagram/TikTok/YouTube, hashtag limits, invalid thread formats, Facebook Reel requirements, and character limit violations. Accepts the same body as `POST /v1/posts`. Does NOT validate accounts, process media, or track usage. This is content-only validation. Returns errors for failures and warnings for near-limit content (>90% of character limit).
Open Source
Open-source projects and OpenAPI specifications built with and for the Late API