Quickstart

Sign up at openpost.so/signup. You’ll get a 7-day free trial on any plan (Plus, Pro, or Max). Your card is required but won’t be charged until day 7 — cancel any time before then and you pay nothing. Pick the plan that matches the features you need.

In the left nav, click Connections, then + Add channel. Pick X (Twitter). You’ll be sent to X, shown the scopes we’re requesting, and redirected back.

The scopes we request: tweet.read, tweet.write, users.read, offline.access. Nothing more. You can disconnect at any time from the same screen.

Click Createin the left nav. Pick your newly connected channel at the top. Type your post. You’ll see a live preview on the right showing exactly what it will look like when it ships.

Try adding an image, a link, and a hashtag — each platform’s preview updates with its own rendering rules (link unfurling, image aspect ratio, character count).

Two options at the bottom of the composer:

• Publish now— sends to the channel within seconds.
• Schedule— pick a time, or let us drop it into your next open queue slot.

Either way, you’ll land back on the Posts list with a new entry. Click it to see the publish status, engagement, and a link to the live post.

If you scheduled a post, the calendar view under Calendarwill show it in its time slot. OpenPost publishes on the minute — never late, never clustered.

In the dashboard, go to Settings → API Keys and click + Generate key. Keys are shown once — copy yours somewhere safe. Prefix is op_live_ for live keys, op_test_ for keys that post to a sandboxed channel.

export OP_KEY=op_live_xxxxxxxxxxxxxxxxxxxx

A quick /health ping confirms your key is valid.

curl https://api.openpost.so/v1/health \
  -H "Authorization: Bearer $OP_KEY"

You should get back:

{
  "ok": true,
  "workspace": "acme-inc",
  "key_name": "default"
}

Before you can post, check which channels are connected.

curl https://api.openpost.so/v1/integrations \
  -H "Authorization: Bearer $OP_KEY"

Each connected channel has an id, a platform, and a display name. Grab the ID of the one you want to post to.

Choose your language — same request, different syntax:

curl -X POST https://api.openpost.so/v1/posts \
  -H "Authorization: Bearer $OP_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Hello world from OpenPost.",
    "integrations": ["int_abc123"],
    "schedule_at": "2026-04-20T14:00:00Z"
  }'

List your scheduled posts and you’ll see the new one:

curl https://api.openpost.so/v1/posts?status=scheduled \
  -H "Authorization: Bearer $OP_KEY"