---
title: "Bluesky API: post and schedule from code"
url: "https://get1post.com/developers/bluesky.md"
canonical_url: "https://get1post.com/developers/bluesky"
last_updated: "2026-10-26"
type: "reference"
summary: "Post and schedule to Bluesky with the 1Post API and MCP server: the request, the reply, every rule it is checked against and a dry run."
related: ["https://get1post.com/platforms/bluesky.md", "https://get1post.com/platforms/bluesky/specs.md", "https://get1post.com/docs/api-posts.md", "https://get1post.com/docs/mcp.md"]
---

# Bluesky API: post and schedule from code

Post and schedule to Bluesky with the 1Post API and MCP server: the request, the reply, every rule it is checked against and a dry run.

Post to Bluesky from code with one request: POST /v1/posts with your account id, the text and a schedule_at time. Bluesky text is limited to 300 characters, counted by the characters a reader sees. 1Post allows up to 100 posts a day for each connected account, and a dry run checks a post against every rule first.

## Connect Bluesky first

1. Create an app password in Bluesky's settings.
2. Open Accounts in 1Post and choose Connect, then Bluesky.
3. Enter your handle and the app password.
4. Choose the account in the composer.

Then GET /v1/accounts returns the id of the Bluesky account to use in the request.

## Send a post to Bluesky

**Schedule a post**

```bash
curl https://api.get1post.com/v1/posts \
  -H "Authorization: Bearer $ONEPOST_API_KEY" \
  -H "Idempotency-Key: bluesky-first-post" \
  -d '{"accounts":["ACCOUNT_ID"],"text":"Notes from the latest release.","schedule_at":"2026-11-02T15:00:00Z"}'
```

The reply is 202 with the post (status scheduled) and one destination for Bluesky, which moves from queued to published or failed.

## What you can send to Bluesky

- Text
- Up to 4 images
- One video
- Threads
- Alt text

## Bluesky rules the request is checked against

| Rule | What 1Post checks |
| --- | --- |
| Text limit | 300 characters, counted by the characters a reader sees |
| Media accepted | Images, Video |
| Images per post | 4 |
| Videos per post | 1 |
| Images and video together | Not in one post |
| Threads | Yes, as a chain of replies |
| First comment | Yes |
| Posts per day, per connected account (1Post) | 100 |

The same table with sources is on the [Bluesky specs page](https://get1post.com/platforms/bluesky/specs.md).

## Bluesky options in the request

- Thread: send parts instead of text. Each part is one post in the chain, up to 100 parts, and each is counted on its own.
- First comment: add first_comment with text to an account object, and delay_min if it should wait.

**A two-part thread in the next free slot**

```json
{
  "accounts": [
    "ACCOUNT_ID"
  ],
  "parts": [
    {
      "text": "1/ The short version."
    },
    {
      "text": "2/ The detail.",
      "delay_min": 1
    }
  ],
  "use_next_free_slot": true
}
```

## Check the post before it is queued

Add "dry_run": true to test a post: nothing is kept, a valid one answers 200 and a broken one answers 422 naming the rule.

**A refused request, abridged**

```json
{
  "error": {
    "code": "invalid_for_platform",
    "message": "bluesky refuses this post: Bluesky counts 332 of 300 characters in part 1. (text_too_long).",
    "fix": "Fix the rule named in the message and send the post again.",
    "retryable": false,
    "request_id": "REQUEST_ID"
  }
}
```

An assistant connected to the [MCP server](https://get1post.com/docs/mcp.md) sends the same fields to create_post; [set one up](https://get1post.com/assistants.md).

## Questions

**Can I post to Bluesky with an API key?**

Yes. A key with write scope can create, change and cancel Bluesky posts for the workspace it belongs to, with the role of the member who made it. See [API authentication](https://get1post.com/docs/api-authentication.md).

**What happens if a Bluesky post breaks a rule?**

The request is refused with invalid_for_platform and the failing rule is named. Fix it and send the request again, or send it with dry_run to test the fix first.

**How many Bluesky posts can I send in a day?**

Up to 100 for each connected account. A request that would pass that answers daily_cap with the time the day frees up.

## Related

- [Schedule Bluesky posts: formats, limits, setup](https://get1post.com/platforms/bluesky.md)
- [Bluesky specs and limits: text, media, daily cap](https://get1post.com/platforms/bluesky/specs.md)
- [Creating and changing posts with the API: 1Post docs](https://get1post.com/docs/api-posts.md)
- [The MCP server: 1Post docs](https://get1post.com/docs/mcp.md)