publora/bluesky-post

Bluesky Post

Create and schedule posts to Bluesky using the Publora MCP server. Supports text posts with auto-detected hashtags and URLs, images and videos.

Prerequisites

Plans: Works on the free Starter plan. Current limits and pricing: publora.com/pricing.

Getting Started

1. Create account at publora.com/register (free)
2. Generate app password in Bluesky Settings > App Passwords (NOT your main password)
3. Connect Bluesky in Publora Dashboard using your handle + app password
4. Get API key at app.publora.com/dashboard/api
5. Connect your agent to the MCP server at https://mcp.publora.com, authenticating with Authorization: Bearer sk_YOUR_API_KEY. In Claude Code:

claude mcp add publora --transport http https://mcp.publora.com \
  --header "Authorization: Bearer sk_YOUR_API_KEY"

Claude Desktop, Cursor, Codex, OpenClaw and the claude.ai connector each need a different config file or flow: see client setup for the exact path and snippet.

REST API Fallback

If the MCP server is unavailable or returns errors, use the REST API directly:

Base URL: https://api.publora.com/api/v1

Authentication: Use x-publora-key header (NOT Authorization: Bearer):

# Get your connected platforms
curl -X GET "https://api.publora.com/api/v1/platform-connections" \
  -H "x-publora-key: sk_your_api_key"

# Create a post
curl -X POST "https://api.publora.com/api/v1/create-post" \
  -H "x-publora-key: sk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "platforms": ["bluesky-did:plc:abc123xyz"],
    "content": "Your post content here",
    "scheduledTime": "2026-03-25T10:00:00Z"
  }'

Platform ID Format: bluesky-{did} where {did} is from /platform-connections response.

Example IDs: bluesky-did:plc:abc123xyz, bluesky-did:plc:def456uvw

📖 Full API documentation: docs.publora.com

Platform Limits

Feature	Limit
Characters	300
Images	Up to 4 per post
Image size	exactly 2,000,000 bytes (decimal, not 2 MiB)
Video duration	3 minutes
Video size	50-100 MB (based on duration)
Videos per day	25
Alt text	2,000 characters on Bluesky itself, but not settable through this API (see below)

Video Size Tiers

Duration	Max Size
Under 60s	50 MB
60s - 3min	100 MB

Rich Text Facets

Bluesky uses a unique rich text system. Publora handles the complexity automatically:

• Hashtags: #hashtag auto-detected and made clickable
• URLs: Any URL auto-detected and made clickable
• Byte offsets: Calculated correctly for multi-byte characters (emojis, CJK)

No special formatting needed - just write naturally.

Available Tools

create_post

Create a new Bluesky post.

Parameters:

• platforms: Array with your Bluesky connection ID (e.g., ["bluesky-did:plc:abc123xyz"])
• content: Post text (up to 300 characters)
• scheduledTime: ISO 8601 UTC datetime. Optional: omit it and the post is created as a draft. Send a future time to schedule. A time five or more minutes in the past is rejected with SCHEDULED_TIME_IN_PAST, so for immediate posting use the current time plus a minute.
• mediaUrls: up to 10 public https image or video URLs. Publora downloads them server-side and attaches them before validation, so media and scheduling happen in one call. This is the one-shot alternative to the draft then get_upload_url then complete_media flow. Ingestion is rate-limited to 60 URLs per hour.

get_upload_url

Get presigned URL for media uploads.

Parameters:

• postGroupId: Post ID to attach media to
• fileName: File name (e.g., "photo.jpg")
• contentType: image/jpeg, image/png, video/mp4
• type: "image" or "video"

complete_media

Finalize a file uploaded through get_upload_url, after the presigned PUT succeeds. Optional, because scheduling also finalizes pending media, but calling it early surfaces format and probe errors before publish. Not needed for media attached with mediaUrls.

Parameters:

• mediaId: the id returned by get_upload_url

list_connections

List your connected accounts with their platform IDs. Call this first and copy the IDs verbatim; they are never guessable.

post_stats

Engagement counters for a published Bluesky post: reactions, comments, reposts, quotes and bookmarks. Live at request time, cached for roughly two hours.

Parameters:

• platform: bluesky
• platformId: your Bluesky connection ID
• postedIds: the published post ids to look up

profile_stats

Followers, following and post count for the connected account.

Parameters:

• platform: bluesky
• platformId: your Bluesky connection ID

list_posts / get_post / update_post / delete_post

Manage scheduled and draft posts. update_post also patches content and platforms on a draft or scheduled post, so fixing a typo or retargeting no longer means delete and recreate. delete_media and prune_media_reference clean up uploaded files.

Examples

Simple Post with Hashtags

Post this to Bluesky:
"Just launched our new API documentation! Check it out at https://docs.example.com #devtools #api"

Hashtags and URLs are automatically made clickable.

Post with Image

Post this to Bluesky with a dashboard screenshot:
"Our new analytics view is live! #buildinpublic"

Multiple Images

Create a Bluesky post with before/after comparison images:
"Office renovation complete! What a transformation."

Note: Up to 4 images allowed per post.

Video Post

Post this 60-second demo video to Bluesky:
"Quick tour of our new mobile app features"

Scheduled Post

Schedule this for tomorrow at 10 AM:
"Good morning! Here's your daily productivity tip..."

Important Restrictions

0. Alt text cannot be set through the API. The Bluesky publisher reads an alt property on media, but nothing persists it: neither the presigned upload flow nor mediaUrls stores it, and an altTexts value sent to create-post is silently ignored. platformSettings is no help either, since Bluesky is rejected there with 400 PLATFORM_SETTING_UNKNOWN. Post the image, then add alt text in the Bluesky app. Do not tell the user their alt text was published.

1. App password required: You must use a Bluesky app password, NOT your main account password. Generate one at Settings > App Passwords.

2. All images converted to JPEG: Regardless of input format (PNG, WebP, GIF), all images are converted to JPEG before upload.

3. Hard 2,000,000-byte image limit: the AT Protocol enforces an exact decimal byte ceiling, not a rounded 2 MiB. Compress to 80-85% JPEG quality and check the byte count.

4. DID-based platform ID: Unlike other platforms using numeric IDs, Bluesky uses did:plc:xxx format.

5. Email verification for video: You must verify your email in Bluesky before uploading videos.

6. 25 video daily limit: Maximum 25 videos OR 10 GB per day.

Best Practices

Content

1. Concise posts: 300 chars is shorter than Twitter - be punchy
2. Natural hashtags: 1-2 relevant hashtags work well
3. Alt text: worth adding, but you have to do it in the Bluesky app after posting; the API cannot carry it
4. URLs work: Links are clickable (unlike some platforms)

Timing

• Growing platform: Less crowded than X, easier to get noticed
• Tech-savvy audience: Developer and early-adopter heavy
• Frequency: 1-3 posts per day

Engagement

• Bluesky favors authentic conversation
• Reply to comments to build community
• Follow relevant users to grow network

Troubleshooting

Error	Cause	Solution
"Invalid credentials"	Wrong password type	Use app password, not main password
"Image too large"	Over 2,000,000 bytes	Compress to 80-85% JPEG quality
"Content too long"	Over 300 chars	Shorten content (no auto-threading)
"Video daily limit"	25 videos reached	Wait 24 hours
"Email not verified"	Trying to upload video	Verify email in Bluesky settings