LinkedIn Poster

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name: linkedin description: Use when you need to post content to LinkedIn, including text posts, image posts, and #BuildInPublic updates. Handles text-only and image posting via the LinkedIn UGC API through the linkedin channel extension. Triggers on phrases like "post to LinkedIn", "share on LinkedIn", "LinkedIn update", "publish to my feed", "build in public post". homepage: https://github.com/openclaw/openclaw/tree/main/extensions/linkedin metadata: { "openclaw": { "emoji": "💼", "requires": { "config": ["channels.linkedin"] }, "author": "david-xu", "version": "1.0.0", "tags": ["social", "linkedin", "posting", "build-in-public"], }, }

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LinkedIn Posting

Overview

Post text and images to LinkedIn via the message tool using the linkedin channel. Supports text-only posts, image posts (local files or URLs), and #BuildInPublic updates.

Prerequisites

The linkedin channel must be configured in channels.linkedin with:

accessToken: OAuth 2.0 token with w_member_social scope

personUrn: Your LinkedIn person URN (e.g. urn:li:person:Abc123)

Posting Text

Use the message tool to send a text post:

message send --channel linkedin --text "Your post content here"

The post goes to the authenticated user's LinkedIn feed as a public post.

Posting with Images

Two-step process:

1. Create the image — generate or locate the image file (PNG/JPG/GIF/WebP) 2. Post with image — use message send with the --media flag:

message send --channel linkedin --text "Post caption" --media /path/to/image.png

Supported image sources:

Local file paths: /Users/david/image.png

file:// URLs: file:///Users/david/image.png

Remote URLs: https://example.com/image.png

Image Upload Flow (internals)

The extension handles a 3-step LinkedIn UGC API flow automatically: 1. Register upload → gets uploadUrl + asset URN 2. PUT binary to uploadUrl 3. Create UGC post with asset reference

You don't need to manage this — just provide the image path.

Best Practices

Always confirm post content with the owner before posting

Keep posts concise — LinkedIn favors 150-300 word posts

Add hashtags at the end, not inline (3-5 max)

For #BuildInPublic: include what you built, what you learned, a visual

Image sizing: 1200x627px for link previews, 1080x1080 for square posts

Never post without explicit owner approval

Post Templates

#BuildInPublic Update

🚀 [What you built today]
[2-3 sentences about what it does and why it matters]
Tech stack: [list]
[Screenshot or diagram]
#BuildInPublic #[topic] #[tech]

Project Milestone

✅ [Milestone achieved]
[Brief context — what, why, how]
Key learnings:
→ [Learning 1]
→ [Learning 2]
→ [Learning 3]
Next up: [what's coming]
#[project] #[topic]

Technical Deep-Dive

💡 TIL: [Thing you learned]
[Explanation in 2-3 paragraphs]
[Code snippet or diagram if relevant]
#TIL #[topic] #[tech]

Troubleshooting

| Error | Cause | Fix | |---|---|---| | 401 Unauthorized | Token expired | Re-authenticate, update channels.linkedin.accessToken | | 403 Forbidden | Missing w_member_social scope | Re-create OAuth app with correct scopes | | Image upload 400 | File too large (>10MB) | Compress image before uploading | | Empty postUrn | API didn't return ID | Post likely succeeded — check LinkedIn feed |

The linkedin channel must be configured in channels.linkedin with:

accessToken: OAuth 2.0 token with w_member_social scope

personUrn: Your LinkedIn person URN (e.g. urn:li:person:Abc123)

Always confirm post content with the owner before posting

Keep posts concise — LinkedIn favors 150-300 word posts

Add hashtags at the end, not inline (3-5 max)

For #BuildInPublic: include what you built, what you learned, a visual

Image sizing: 1200x627px for link previews, 1080x1080 for square posts

Never post without explicit owner approval