How to Post Directly to Social Media From Gemini

Create an account, then connect each profile from the dashboard. Every platform uses its official login, so you will see the normal Instagram, TikTok or Google permission screen. This is the only place your platforms are ever authorised. Gemini talks to post bridge, never to the platforms.

• Connect everything you might post to now. Adding an account later takes a minute and needs nothing redone on the Gemini side.
• Instagram needs a professional account (business or creator). Personal accounts cannot be posted to by any tool.
• Facebook connects Pages, not personal profiles. YouTube connects the channel you pick in the Google screen.

Add this block to ~/.gemini/settings.json (create the file if it does not exist):

{
  "mcpServers": {
    "post-bridge": {
      "httpUrl": "https://www.post-bridge.com/api/mcp/mcp"
    }
  }
}

Start gemini. On first use it opens your browser on a post bridge screen asking you to allow access. Approve it, and the post bridge tools are available in every session. Run /mcp inside Gemini CLI to see them listed.

Mockup. Real capture coming.

Start a new chat and ask for your accounts. This does two things: it confirms the server is live in this chat, and it gives you the exact account names to use in every later prompt.

You get a table of platform and handle. If you run more than one account on a platform, copy the handle you want into your prompts, for example "my @jackfriks Instagram". Otherwise Gemini will stop and ask which one, every time.

The simplest case. Nothing to upload, so Gemini calls the scheduling tool straight away.

What happens

1. Gemini CLI asks you to allow the post bridge tool the first time it wants to write. Allow once, or always for this session.
2. It creates one post with your caption unchanged, on both accounts, scheduled for 9am tomorrow in your account timezone.
3. At 9am post bridge publishes to both and records a result per platform, with the live URL or the real error.

Mockup. Real capture coming.

Images need to reach post bridge first. Give Gemini a public URL that points straight at the file and it uploads it for you. For files on your device, use the upload link in step 6, which takes a whole carousel in one drop.

What happens

1. Gemini downloads the image into your post bridge media library and gets a media id back.
2. It writes the caption exactly as given, sets the Instagram first comment, and schedules for Friday at noon.
3. At noon on Friday, Instagram and LinkedIn each publish through their official API and report back separately.

Mockup. Real capture coming.

Video is the case every other guide skips. Files you reference in Gemini CLI can be sent as base64 only under 3MB, and a video on your phone or laptop has no public URL to upload from. So post bridge gives Gemini a way to ask you for the file directly.

What happens

1. Gemini requests an upload link and sends it to you. It works for 24 hours and takes files up to 500MB.
2. You open the link in any browser, on the phone the video is on if you like, and drop the file in. It lands in your post bridge media library.
3. Tell Gemini it is uploaded. It finds the newest file, writes three captions, and schedules the post for 9am tomorrow.
4. At 9am post bridge publishes to all three platforms and records the result of each.

Shown in Claude. Same server, same prompt in Gemini.

Two prompts worth using every time, because they are the difference between trusting the tool and knowing.

Scheduled posts also appear in the post bridge calendar, where you can edit, move or delete them by hand. A post that failed on one platform still published on the others, and the per-platform result carries the actual error from that platform.