Can an AI agent post to Bluesky?

Yes. Connect Bluesky in Mynahcast, give your agent an Agent API key, and it can draft and schedule Bluesky posts through the MCP server (https://api.mynahcast.xyz/mcp) or the REST API. Each post waits for your approval before it goes out.

How do I post to Bluesky with an API?

Send POST https://api.mynahcast.xyz/v1/posts with your API key as a bearer token, the brand id, the post body and your Bluesky channel id as a target. Add an Idempotency-Key header so a retry never posts twice.

What is the character limit for Bluesky posts in Mynahcast?

Up to 300 characters per post; longer text can go out as a thread of replies. Mynahcast checks the limit before saving, so an agent finds out at validation time, not at publish time.

Is posting to Bluesky with Mynahcast free?

Every Mynahcast plan includes every live channel, from $12 per month (5 channels) with a 7-day free trial.

Live

Bluesky

With an app password you can revoke any time.

What it supports

Up to 300 characters per post.
Threads: follow-up parts go out as replies, in order.
Media: up to 4 images, with alt text.
Every post is read back from the platform by its id after it goes out.
Approvals, scheduling and one-time delivery work the same as on every other channel.

How to connect

In Mynahcast: Channels → Add channel → Bluesky.

App password

1Open https://bsky.app/settings/app-passwords and add one called “Mynahcast”.
2Paste your handle and the app password in Mynahcast. Never use your main password.

You'll paste

Handle
App password

Credentials are encrypted before they're stored and never shown again. Disconnect any time from the Channels page.

Post to Bluesky from your AI agent

Once Bluesky is connected, any agent with a Mynahcast key can target it: Claude Code, Cursor and other MCP clients through mynahcast_create_post, ChatGPT through a GPT action, or your own code through the REST API. Connect your agent.

REST: schedule a Bluesky post

curl -X POST "https://api.mynahcast.xyz/v1/posts" \
  -H "Authorization: Bearer $MYNAHCAST_KEY" \
  -H "Idempotency-Key: bluesky-001" \
  -H "Content-Type: application/json" \
  -d '{
    "brandId": "<brand-uuid>",
    "content": { "body": "Your post text" },
    "targets": [{ "channelId": "<bluesky-channel-uuid>" }]
  }'

Frequently asked questions

Can an AI agent post to Bluesky?: Yes. Connect Bluesky in Mynahcast, give your agent an Agent API key, and it can draft and schedule Bluesky posts through the MCP server (https://api.mynahcast.xyz/mcp) or the REST API. Each post waits for your approval before it goes out.
How do I post to Bluesky with an API?: Send POST https://api.mynahcast.xyz/v1/posts with your API key as a bearer token, the brand id, the post body and your Bluesky channel id as a target. Add an Idempotency-Key header so a retry never posts twice.
What is the character limit for Bluesky posts in Mynahcast?: Up to 300 characters per post; longer text can go out as a thread of replies. Mynahcast checks the limit before saving, so an agent finds out at validation time, not at publish time.
Is posting to Bluesky with Mynahcast free?: Every Mynahcast plan includes every live channel, from $12 per month (5 channels) with a 7-day free trial.

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