RelayAPI

LinkedIn API

Posting to LinkedIn via RelayAPI — features, limits, and platform-specific settings.

Overview

RelayAPI supports publishing to LinkedIn through the unified API. Connect your LinkedIn account and start posting programmatically.

Getting Started

  1. Connect your LinkedIn account via the dashboard or Connect Account API
  2. Use the account ID as a target when creating posts
curl -X POST https://api.relayapi.dev/v1/posts \
  -H "Authorization: Bearer rlay_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Hello from RelayAPI!",
    "targets": ["acc_linkedin_123"]
  }'

Content Limits

PropertyLimit
Character limit3000
Supported mediaImages (9), Video (1), Documents
Media size limits10 MB images, 200 MB video

Platform-Specific Settings

Use platform_overrides to customize content for LinkedIn:

{
  "content": "Default content for all platforms",
  "platform_overrides": {
    "linkedin": {
      "content": "Custom content for LinkedIn"
    }
  }
}

Rate Limits

LinkedIn enforces its own rate limits. RelayAPI automatically queues and retries posts when platform rate limits are reached. See Rate Limits for details.

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