Connect Gemini to After Effects
Gemini drives After Effects through Antigravity, not the Gemini app. The app has no MCP client, so there is nothing in it to add a server to. Antigravity is Google's agent surface and it speaks MCP, including remote servers with browser sign-in, which is what Prism needs. About two minutes, once.
Gemini CLI was retired on 18 June 2026
Google sunset Gemini CLI in favour of Antigravity. Guides telling you to edit a Gemini CLI settings.json no longer apply, and neither does the old httpUrl key.
| Surface | Works | Why |
|---|---|---|
| Antigravity (IDE, CLI, 2.0) | Yes | Remote MCP servers with OAuth browser sign-in |
| Gemini app · gemini.google.com | No | No MCP client at all |
| Gemini CLI | Retired | Sunset 18 June 2026 |
Connect Antigravity to After Effects
serverUrl, not url or httpUrl
Antigravity rejects the legacy url and httpUrl keys. A server declared with either is never reached, and the failure looks like Prism is down.
https://live.oneprism.io/after-effects — the same for everyone, and it holds no secret.Either use the built-in manager, or edit the file directly.
| How | Where |
|---|---|
| Antigravity 2.0 | Settings ▸ Customizations ▸ Installed MCP Servers |
| Antigravity IDE | Agent panel ▸ … ▸ MCP Servers ▸ Manage MCP Servers |
| Antigravity CLI | /mcp opens the MCP Manager |
| By hand, globally | ~/.gemini/config/mcp_config.json |
| By hand, per project | .agents/mcp_config.json |
{
"mcpServers": {
"prism": {
"serverUrl": "https://live.oneprism.io/after-effects"
}
}
}Antigravity opens your browser for OAuth and asks you to confirm it is you. Complete it there. No headers block and no token: Prism issues no keys, so anything you paste into one would be meaningless.
Or skip the commands: paste the address into the agent itself and ask it to add the MCP server. It can configure its own client.
Prove it works
- "Tell me about my current composition." proves the read path
- "Stagger these layers by two frames and ease them out." proves the write path
- "Transcribe this audio layer into subtitles." proves Prism AI
If it does not work
| What you see | What it usually means |
|---|---|
| The server is listed but never reached | url or httpUrl was used. Antigravity only accepts serverUrl |
| It asks for an API token | A headers block was added. Remove it and let OAuth run |
| Every call is refused | The browser authorisation was never completed |
| It cannot reach Prism | The panel is closed. It has to be open in After Effects |
| It connects but sees no composition | No comp is active. Open one |
Common questions
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