Rebbel in Gemini Spark
Add Rebbel, your AI marketing department, to Gemini Spark as a custom app. Draft posts, launch campaigns, check results and schedule posts in plain English — nothing goes out until you say so.
Publishes to Facebook, Instagram, X, Threads, Bluesky, LinkedIn — Personal, and Pinterest. Straight from Gemini Spark, and only after you schedule each post. TikTok and YouTube posts are made in the Rebbel dashboard.
Set up
Read this first. This works in Gemini Spark, not in a regular Gemini chat. Custom apps showed on Google AI Pro; if your Google plan doesn't show the option, it doesn't have it yet. Google also says it hasn't reviewed custom apps and doesn't control, monitor or secure them.
https://app.rebbel.io/api/mcp- 1Open Connected Apps. On gemini.google.com: Settings → Personal Intelligence → Connected Apps.
- 2Paste the URL. Choose Custom apps. Under “Custom apps for Spark”, paste the address above into Add a custom app link to get started and click Next, then Next again on the “Connect to an MCP server” box.
- 3Accept Google's risk notice. On “Connect this MCP server”, scroll down, tick I understand and accept the security and privacy risks of connecting this custom app, and click Connect. The box is taller than a small window, and Connect does nothing until the tick is there.
- 4Link your accounts and sign in to Rebbel. Google shows a screen titled “Link your Google Account and [Custom] Rebbel account”. Continue through it and sign in to Rebbel when asked.
- 5Save the app. On “Save your custom app” you'll see the name Rebbel and the 50 tools it offers. Click Connect; Gemini says “Custom app added”.
- 6Use it in Gemini Spark. Switch from Chat to Spark at the top of the sidebar (the first time, Gemini asks you to choose Use Spark), then describe a task that names Rebbel, like “Using my connected Rebbel app, list my brands.”
Which Google accounts have it. Custom apps showed on Google AI Pro. Google hasn't said which plans include them, so if Gemini's Connected Apps page has no custom-app option, your account doesn't have it yet. Google's requirements: 18 or over, in the US, a personal Google Account (not work or school), Keep Activity on, and English. Rebbel works in Gemini Spark (which Google labels a beta), not by typing @ in a regular Gemini chat, so that's where these steps end.
Google's warning. Gemini tells you the app “hasn't been reviewed by Google”, and Google's help page says it doesn't control, monitor or secure third-party MCP servers, so trust the provider and read its privacy policy before connecting. This is a custom app you add yourself. Rebbel's own rule doesn't change: nothing goes out or spends until you say so.
Steps last checked Sep 26, 2026.
Things people say to it
How-to guides for Gemini Spark
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- How to post to Facebook from Gemini Spark
- Gemini Spark for social media campaigns: a marketing department in your chat
Common questions
- Can Rebbel post from Gemini Spark without my say-so?
- No. Anything that would publish or spend needs your explicit go-ahead, checked on the server — asking from Gemini Spark follows the same rules as the dashboard.
- Which channels can Rebbel publish to from Gemini Spark?
- Rebbel publishes to Facebook, Instagram, X, Threads, Bluesky, LinkedIn — Personal, and Pinterest, and only after you schedule each post. TikTok and YouTube posts are made in the Rebbel dashboard.
- What can I ask Rebbel to do in Gemini Spark?
- Set up a brand from your website, draft this week's posts, launch a campaign, check how last week's posts did, and schedule a post — in plain English.
- Do I need a paid Google plan to add Rebbel to Gemini?
- Custom apps in Gemini Spark are on Google AI Pro. If you don't see the Custom apps option, your Google plan may not include it yet. Google hasn't said which plans include them, so if Gemini's Connected Apps page has no custom-app option, your account doesn't have it yet. Google's requirements: 18 or over, in the US, a personal Google Account (not work or school), Keep Activity on, and English.
- Can I use Rebbel in a regular Gemini chat instead of Gemini Spark?
- Rebbel works in Gemini Spark (which Google labels a beta), not by typing @ in a regular Gemini chat, so that's where these steps end.
- Is it safe to connect a custom app to Gemini?
- Google shows a warning when you add one: it doesn't control, monitor or secure third-party MCP servers, so you should trust the provider and read its privacy policy first. What Rebbel adds is that nothing publishes or spends until you say so, checked on Rebbel's servers whichever app you ask from.
