Zernio

I tested it by posting a meme video to my X account from inside Claude Code.

1. what it does

You authenticate once per platform. Then you call the API with your media and caption. Zernio handles the upload, format conversion, and publishing. A TypeScript SDK makes integration straightforward.

Pricing is reasonable for the use case: automation at scale without building platform-specific OAuth flows yourself.

2. what worked

The TypeScript SDK is clean. Setup friction is minimal. I had a working post in under 10 minutes.

Video posting to X worked. The SDK approach handled the media attachment correctly. Claude Code could generate the integration from the SDK types alone.

This solves a real pain: posting YouTube-style content to X programmatically is annoying to build from scratch. Zernio abstracts it.

3. what did not work

My first attempt only sent text without the video attached. The fix was using the SDK properly instead of the raw API. Not a product bug; more of an API discoverability issue.

4. verdict

Nearly perfect for the use case. Clean SDK; minimal setup; works as advertised. If you are building an agent that publishes content automatically, Zernio removes the hardest part.

Best for: developers building content automation pipelines or AI agents that publish to social media.