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24K Labs Social Post Validator
x402
24K Labs Social Post Validator is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Validates a social media post against platform-specific limits for X/Twitter, LinkedIn, Instagram, or Bluesky, returning weighted character count, hashtag/mention/link caps, over-limit flag, and a truncation preview.
Price / call$0.003
Success—
StatusUnknown
How this service works
Check a post against X/Twitter, LinkedIn, Instagram or Bluesky limits: weighted character count, hashtag/mention/link caps, over-limit flag and a truncation preview.
Output
Returns a structured response with the weighted character count for the chosen platform, whether individual caps (hashtags, mentions, links) have been exceeded, a boolean over-limit flag, and a truncation preview string showing how the post would appear if cut to the platform's maximum length.
Example use cases
Pre-schedule Twitter post validation
“I'm about to schedule this tweet — can you validate it against Twitter's limits first? The text is: 'Big news: we just closed our Series A! Huge thanks to @sequoia and @a16z for believing in us. Read the full story at https://blog.example.com/series-a #funding #startup #tech #VC #entrepreneurship' — tell me the weighted character count and whether it's over the limit.”
LinkedIn post length check
“Can you check if this LinkedIn post is within the character and hashtag limits? Here it is: 'After 10 years in the industry, I've learned that the most important skill isn't technical expertise — it's empathy. Here's why leaders who listen outperform those who dictate, every single time. #leadership #management #careergrowth #professionaldevelopment #LinkedIn'”
Instagram caption compliance check
“Check my Instagram caption against the platform's limits before I publish — is this within the character cap and do I have too many hashtags? Caption: 'Golden hour magic ✨ swipe to see the full set from last weekend's shoot! #photography #goldenhour #portrait #naturelighting #canon #photographer #photooftheday #instaphoto #shootingfilm #analogphotography #lightroom #editingtips #portraits #bokeh #outdoorphotography #visualarts'”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/social-post-validateWhen to prefer
Use this endpoint when you need to programmatically verify that a social post conforms to a specific platform's rules before scheduling or publishing — especially when the post contains URLs (which are weighted differently on Twitter), hashtags, mentions, or emoji that affect character counting in non-obvious ways. Prefer this over manual counting or generic string-length checks when platform-specific weighted counting and cap enforcement matter.
Side effects
- Unsupported platform name returns a validation error
- Empty or missing post text returns a 400 bad request
- Extremely long posts may still return a truncation preview but processing is slightly slower
- Network timeout on the x402 payment layer may prevent the call from completing
- Ambiguous Unicode characters may cause slight discrepancies in weighted character counts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | |
| platform | string |
Output
Schema · Response
{
"type": "json",
"example": {
"platform": "twitter",
"within_limit": true
}
}Tags
x402
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