Connect accounts once. Publish, engage, and measure across X, Instagram, Facebook, Threads, and more from a single API.
No credit card required
curl -X POST https://api.onepostly.com/v1/posts \ -H "x-api-key: op_YOUR_KEY" \ -H "Content-Type: application/json" \ -d '{ "text": "Ship once. Post everywhere.", "mediaKind": "image", "mediaUrls": ["https://cdn.example.com/launch.png"], "destinations": [ { "connectionId": "conn_x_123" }, { "connectionId": "conn_ig_456" } ] }'Supported Platforms
How it works?
Create an account and connect one social profile. Free includes one account and no card is required.
Grab an API key and call Onepostly from your app, backend, or automation: cURL, SDK, or webhook.
Send one request with content and destinations. We publish across platforms and return per-platform status.
For AI agents
Official skill, hosted MCP, and a simple REST API. Built for Claude, Cursor, Codex, and many more.
Drop-in skill for Claude Code, Cursor, and Codex. Publish and manage posts across every platform.
$ npx skills add onepostly/skills --all
Installing skills…
✓ publish
✓ schedule
✓ accounts
> post this to Instagram and X tomorrow 9am
→ scheduled · post_01H…
One config block. Claude, Cursor, or any MCP client gets every Onepostly tool natively.
{
"mcpServers": {
"onepostly": {
"url": "https://mcp.onepostly.com",
"headers": { "Authorization": "Bearer …" }
}
}
}
Pipe-friendly REST. Publish from OpenAI, LangChain, CrewAI, or any function-calling stack.
$ curl -X POST https://api.onepostly.com/v1/posts \
-H "x-api-key: op_YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"text":"Ship once.","destinations":[…]}'
→ 202 · queued
x ✓ · instagram ✓ · threads …
Free to start, fair as you scale.
Everything you need to know about posting through Onepostly, connecting accounts, and how billing works.
Onepostly is one API for all social media. Connect your accounts once, then publish, engage, and measure across X, Instagram, Facebook, Threads, and more from a single API.
No. You integrate Onepostly once. We handle each platform's OAuth, media rules, and API quirks so you don't maintain four (or more) social SDKs yourself.
We support X, Instagram, Facebook, Threads, LinkedIn, TikTok, YouTube, Pinterest, and more coming. The API is designed so you can add destinations without changing your product integration.
Your users (or your team) connect social accounts through OAuth. Tokens are stored securely and refreshed for you. You call Onepostly with your API key; we post on the connected accounts you select.
Send a URL or upload media once. We validate size, type, and format against each platform's rules and return clear errors when something won't publish, before you ship a broken post.
Start free with connected accounts included. Paid plans scale with how many accounts you connect. Upgrade when you need more destinations or higher limits.
