- Price
- Free
- API key
- None
- Limit
- 60 calls a minute
- Tools
- 6
Try it live
513 calls, week of
One topic in, a checked post for each network out.
Write posts about our launch for X, Bluesky and LinkedIn.
What does Post Kit do?
Post Kit is a free MCP server that lets your AI assistant draft a post for each social platform, checked against its rules.
- Writes one post per platform, up to 6 at a time, for X, Bluesky, Threads, LinkedIn and more
- Checks each draft against the platform's length, hashtag, title and link rules; rewrites one that breaks a rule
- Counts length the way the platform does: X weighted characters, Bluesky graphemes, Threads emoji bytes
- Returns a checklist with image sizes and the source of every rule, dated
- Adapts a post you wrote for another language and culture, not a literal translation
- Lists what changed for the new market and can check the result against a platform's limits
10 more in the full text.
Which tools does Post Kit offer?
It has 6 tools. Your assistant picks the one that fits your question and calls it by name.
draft_postsDraft posts for each platformdraft_video_scriptWrite a short-form video scriptlocalize_postAdapt a post for another marketlaunch_videoMake a launch video clipdraft_tiktok_slidesMake TikTok slideshows for one ideamake_coverMake a layered post cover
How do I connect Post Kit?
Add this address to your AI assistant once, as a remote MCP server. It needs no key and no sign-up.
https://postkit.openkrill.app/mcp
Claude Code:
claude mcp add --transport http postkit https://postkit.openkrill.app/mcpHermes Agent:
printf 'n\ny\n' | hermes mcp add postkit --url https://postkit.openkrill.app/mcpHow does Post Kit compare with other tools?
We ran the same 5-input test on Post Kit and 2 other tools, and scored each answer by the rule on the comparison page. The times were taken in different ways, so compare them only roughly.
| Tool | Right | Median time |
|---|---|---|
| Post Kit (ours) | 5 of 5 | 14.2 s |
| ChatGPT | 0 of 5 | 23.2 s |
| Claude | 5 of 5 | 12.3 s |
Questions about Post Kit
Is Post Kit free?
Yes. Post Kit is free to use, with no sign-up, no account and no API key.
What are the limits on Post Kit?
Calls are limited to 60 calls a minute per network and 25000 calls a day per server, shared by all callers.
How do I connect Post Kit to my AI assistant?
Add https://postkit.openkrill.app/mcp to your AI assistant as a remote MCP server (streamable HTTP). It needs no key.
Where does Post Kit get its data?
Post Kit writes with a small free language model that has a fixed daily allowance shared by all users. It checks each draft against the platform's own rules and names their sources. It fetches no post statistics or trends.
What does Post Kit not do?
It publishes nothing for you and reads no account. When the daily allowance is used up, a call says so until 00:00 UTC and still returns the rule checklist.