Developer documentation
Everything you need to build on Postly — guides, references and SDKs to schedule, publish and analyze social content programmatically.
Getting Started
Set up your workspace, connect channels and publish your first post.
Publishing
Compose, schedule and queue posts across every connected platform.
API Reference
Endpoints, request and response schemas and error codes explained.
Webhooks
Subscribe to events and react to publishes, failures and mentions.
Integrations
Connect Postly to Zapier, Make, Slack and the tools you already use.
Authentication
OAuth flows, API keys and scopes for secure access to your account.
Rate Limits
Understand request quotas, throttling and how to handle backoff.
SDKs
Official client libraries for Node.js, Python, Ruby and Go.
Your first API call
Authenticate with your API key and schedule a post in a single request.
$ curl https://api.joinpostly.com/v1/posts \ -H "Authorization: Bearer $POSTLY_KEY" \ -H "Content-Type: application/json" \ -d '{ "channels": ["instagram", "linkedin"], "content": "Shipping something new 🚀", "scheduled_at": "2026-10-01T14:00:00Z" }'
Stuck on something?
Our developer support team can help you debug integrations and API calls.
Ready to build with Postly?
Get your API key and start scheduling posts programmatically in minutes.