Getting Started
Get up and running with the Synposter API in minutes.
What is Synposter?
Synposter is a unified social media posting API. One integration lets you publish content to X/Twitter, LinkedIn, Bluesky, and more. No need to manage individual platform credentials, OAuth flows, or API quirks. Analytics included on every plan.
Who is it for?
- Developers building apps that need programmatic social posting
- SaaS builders adding social publishing to their product
- AI agents that need to post autonomously across platforms
- Social media teams and agencies managing multiple brands and accounts at scale
Base URL
All API requests are made to the following base URL:
https://api.synposter.com/v1Create an Account
Sign up with Google or a magic link email. No credit card required. Once signed in, you are redirected to the dashboard where you can generate an API key.
- Go to synposter.com and click Sign In
- Choose Google or enter your email for a magic link
- Go to Dashboard → API Keys and generate a key
- Copy your key and store it securely. It is only shown once.
Free Trial
New accounts get 20 free posts to try the API end-to-end. The trial is one-time (no monthly reset). Once you reach 20, you can upgrade to a paid plan to keep posting. The trial includes:
| Posts | 20 (lifetime) |
| Profiles | 1 |
| Analytics | Included |
| Platforms | All supported |
Quick Example
Once you have your API key (see Authentication), publish to multiple platforms with a single call:
curl https://api.synposter.com/v1/posts \
-X POST \
-H "x-api-key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"text": "Hello from Synposter!",
"platforms": ["twitter", "linkedin"]
}'