Connect Antigravity to PosteAhora, step by step
Six steps, about three minutes. The same config file serves the Antigravity app, the IDE and the CLI.
Before you start
You need a PosteAhora account with at least one network connected, and Antigravity installed. Nothing to install from us: the server runs on our side.
The connector URL is the same for every client: https://mcp.posteahora.com/mcp. It signs you in with your PosteAhora account — no API key to paste. Networks are connected in Connections first; the assistant can only reach what is connected there.
1. Add the server to mcp_config.json
Open ~/.gemini/config/mcp_config.json and add PosteAhora under mcpServers with this serverUrl. For one project only, use .agents/mcp_config.json in that project instead.
"posteahora": { "serverUrl": "https://mcp.posteahora.com/mcp" }
The field is serverUrl. Antigravity does not read url or httpUrl for remote servers, so a config copied from another editor will not connect.
2. Click Authenticate
Open Agent Settings with Cmd+, (Mac) or Ctrl+, (Windows, Linux), go to Customizations and click Authenticate next to posteahora. A PosteAhora page opens in your browser.
Nothing to paste into the config: no client ID or secret. Antigravity registers itself with our server.
3. Pick a workspace and approve
Sign in if you are not already. The page shows who you are signed in as and what Antigravity will be able to do — read and manage your posts, ideas, connected accounts and analytics. Choose the workspace and click Approve.
The connection is fixed to that workspace. To work in another one, authenticate again and pick it there.
4. Paste the code back
The browser lands on an Antigravity page with an authorization code. Copy it, paste it into the settings panel and click Submit; the server reconnects on its own.
5. Ask the agent
Describe the post and when it should go out.
Write a LinkedIn post about what changed in this release and schedule it for Tuesday at 9:00.
6. See it in your queue
Open Publish in PosteAhora: the post sits under Tuesday at 9:00, marked scheduled, editable until it goes out.
Where these steps come from
Not yet run by us. These steps follow Antigravity's MCP documentation — mcp_config.json, serverUrl and OAuth with dynamic client registration — and were written on September 26, 2026. The URL, the OAuth sign-in and the workspace approval are ours; the Antigravity screens have not been run end to end by us yet, which is why there are no screenshots. When a menu name no longer matches, trust Antigravity's docs, and tell us. Source: Antigravity MCP docs.
FAQ
Can Antigravity post to social media on its own?
No. Antigravity's agents can work in your editor, terminal and browser, but they have no publishing rights on any social network. PosteAhora is the MCP server that gives them those: you connect Instagram, X, LinkedIn and the rest in PosteAhora once, and the agent publishes through those connections.
How do I add PosteAhora to Antigravity?
Add a posteahora entry with "serverUrl": "https://mcp.posteahora.com/mcp" to ~/.gemini/config/mcp_config.json — or .agents/mcp_config.json for one project. Antigravity wants serverUrl for remote servers; url is not read. Then authenticate from Agent Settings → Customizations.
How does the sign-in work?
Click Authenticate next to posteahora in Agent Settings → Customizations. Antigravity opens PosteAhora in your browser; you sign in, pick the workspace and approve, then copy the code shown and paste it back into Antigravity. It refreshes the token itself after that.
Do I need an API key?
No. The sign-in replaces it. An API key is only for a setup without a browser, sent as an Authorization: Bearer header from mcp_config.json, or for running our npm package locally.
Does it work in the Antigravity app, the IDE and the CLI?
All three read the same mcp_config.json, so one entry covers them. In the CLI, /mcp opens the MCP manager, where you can see the server and reload it.
Can it attach a screenshot from my project?
Yes. The server runs on our side and can't read your disk, so the agent asks it for an upload link and sends the file there itself. A public URL works too.
Which workspace does Antigravity post to?
The one you approve when you sign in. The connection is fixed to it; to post from another workspace, sign in again and pick that one.
What does it cost?
Antigravity is billed by Google. On our side there is a 7-day trial for $0 with a card on file, then a flat monthly or yearly price by plan, with the MCP server included. Every plan has unlimited posts; what varies is how many social accounts you can connect.
Marketing version of this guide, with what the integration is for: /mcp/antigravity. Every client that speaks MCP is listed on /mcp.