LateLate API
Platforms

Bluesky API

Post to Bluesky with Late API - text posts, images, and videos

Quick Start

Post to Bluesky in under 60 seconds:

curl -X POST https://getlate.dev/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Hello from Late API! 🦋",
    "platforms": [
      {"platform": "bluesky", "accountId": "YOUR_ACCOUNT_ID"}
    ],
    "publishNow": true
  }'
const response = await fetch('https://getlate.dev/api/v1/posts', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    content: 'Hello from Late API! 🦋',
    platforms: [
      { platform: 'bluesky', accountId: 'YOUR_ACCOUNT_ID' }
    ],
    publishNow: true
  })
});

const { post } = await response.json();
console.log('Posted to Bluesky!', post._id);
import requests

response = requests.post(
    'https://getlate.dev/api/v1/posts',
    headers={'Authorization': 'Bearer YOUR_API_KEY'},
    json={
        'content': 'Hello from Late API! 🦋',
        'platforms': [
            {'platform': 'bluesky', 'accountId': 'YOUR_ACCOUNT_ID'}
        ],
        'publishNow': True
    }
)

post = response.json()
print(f"Posted to Bluesky! {post['_id']}")

Authentication

Bluesky uses App Passwords instead of OAuth. To connect a Bluesky account:

  1. Go to your Bluesky Settings > App Passwords
  2. Create a new App Password
  3. Use the connect endpoint with your handle and app password
curl -X POST https://getlate.dev/api/v1/connect/bluesky \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "profileId": "YOUR_PROFILE_ID",
    "handle": "yourhandle.bsky.social",
    "appPassword": "xxxx-xxxx-xxxx-xxxx"
  }'
const response = await fetch('https://getlate.dev/api/v1/connect/bluesky', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    profileId: 'YOUR_PROFILE_ID',
    handle: 'yourhandle.bsky.social',
    appPassword: 'xxxx-xxxx-xxxx-xxxx'
  })
});

const account = await response.json();
console.log('Connected:', account._id);
response = requests.post(
    'https://getlate.dev/api/v1/connect/bluesky',
    headers={'Authorization': 'Bearer YOUR_API_KEY'},
    json={
        'profileId': 'YOUR_PROFILE_ID',
        'handle': 'yourhandle.bsky.social',
        'appPassword': 'xxxx-xxxx-xxxx-xxxx'
    }
)

account = response.json()
print(f"Connected: {account['_id']}")

Image Requirements

PropertyRequirement
Max Images4 per post
FormatsJPEG, PNG, WebP, GIF
Max File Size1 MB per image
Max Dimensions2000 × 2000 px
Recommended1200 × 675 px (16:9)

Aspect Ratios

TypeRatioDimensions
Landscape16:91200 × 675 px
Square1:11000 × 1000 px
Portrait4:5800 × 1000 px

Post with Image

curl -X POST https://getlate.dev/api/v1/posts \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Check out this photo! 📸",
    "mediaItems": [
      {"url": "https://example.com/photo.jpg"}
    ],
    "platforms": [
      {"platform": "bluesky", "accountId": "YOUR_ACCOUNT_ID"}
    ],
    "publishNow": true
  }'
const response = await fetch('https://getlate.dev/api/v1/posts', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    content: 'Check out this photo! 📸',
    mediaItems: [
      { url: 'https://example.com/photo.jpg' }
    ],
    platforms: [
      { platform: 'bluesky', accountId: 'YOUR_ACCOUNT_ID' }
    ],
    publishNow: true
  })
});
response = requests.post(
    'https://getlate.dev/api/v1/posts',
    headers={'Authorization': 'Bearer YOUR_API_KEY'},
    json={
        'content': 'Check out this photo! 📸',
        'mediaItems': [
            {'url': 'https://example.com/photo.jpg'}
        ],
        'platforms': [
            {'platform': 'bluesky', 'accountId': 'YOUR_ACCOUNT_ID'}
        ],
        'publishNow': True
    }
)

Video Requirements

PropertyRequirement
Max Videos1 per post
FormatsMP4
Max File Size50 MB
Max Duration60 seconds
Max Dimensions1920 × 1080 px
Frame Rate30 fps recommended
PropertyRecommended
Resolution1280 × 720 px (720p)
Aspect Ratio16:9 (landscape) or 1:1 (square)
Frame Rate30 fps
CodecH.264
AudioAAC

Character Limits

  • Post text: 300 characters
  • Alt text for images: 1000 characters

Bluesky automatically detects and renders:

  • URLs as link cards
  • Mentions (@handle.bsky.social)
  • Hashtags

When your post contains a URL, Bluesky automatically generates a link card preview. For best results:

  • Place the URL at the end of your post
  • Ensure the target page has proper Open Graph meta tags
  • The link card includes title, description, and thumbnail

Common Issues

Image Too Large

Bluesky has a strict 1 MB limit per image. Compress images before upload or Late will attempt automatic compression.

App Password Invalid

  • Ensure you're using an App Password, not your main account password
  • App Passwords are formatted as xxxx-xxxx-xxxx-xxxx
  • Create a new App Password if the current one isn't working

Post Too Long

Bluesky has a 300 character limit. If your post exceeds this, consider:

  • Shortening URLs (Bluesky shows link cards anyway)
  • Splitting into multiple posts
  • Moving detailed content to a linked page

Reddit API

Post to Reddit with Late API - Text posts, links, and image posts

Threads API

Post to Threads with Late API - Text, images, videos, and thread sequences

On this page

Quick Start
Authentication
Image Requirements
Aspect Ratios
Post with Image
Video Requirements
Recommended Video Specs
Character Limits
Link Cards
Common Issues
Image Too Large
App Password Invalid
Post Too Long
Related API Endpoints