Antigravity is Google’s agentic development platform, a VS Code-based editor with an Agent Manager that runs tasks on your behalf. It speaks MCP, so you can give it access to everything you have saved on X, Reddit, and LinkedIn and search it by meaning while you work.
Why bookmarks belong in an agent
The saving is the easy part. You read a good thread about connection pooling, you bookmark it, and three weeks later you are building exactly the thing it would have helped with. The save is buried somewhere you cannot search.
With ContextBolt connected, you ask the agent to find it. The search is semantic, so you describe what you need rather than recalling the words you saw. Antigravity already understands your codebase, and now it can also draw on what you have been reading.
That matters more with an agentic editor than a conventional one. When the Agent Manager is running a task on your behalf, your saved material becomes part of the context it works from, not something you remember to look up.
The Antigravity mcp_config.json entry
Open the config from Settings, then Customizations, then Manage MCP Servers, then View raw config. Add ContextBolt under mcpServers:
{
"mcpServers": {
"bookmarks": {
"serverUrl": "https://api.contextbolt.app/mcp/YOUR_TOKEN"
}
}
}The key is serverUrl, not url. Antigravity inherits this from Windsurf’s config style, and it is the detail that trips up anyone coming from Cursor or VS Code where the same field is called url. Because your token sits in the URL path, you do not need a headers block.
Save the file and hit Refresh in the MCP Servers panel.
If it connects but finds nothing
This is the failure worth knowing about, because it does not look like what it is. MCP reads from your synced library. If cloud sync is switched off in the extension settings, the server connects perfectly, reports healthy, and returns an empty result for every query.
Turn sync on in the extension, wait a minute for the upload, and try again before you touch the config.
Working patterns
Ground a task before it starts: ask the agent to check your bookmarks for relevant patterns before it writes anything, so the output builds on material you already trust.
Save without switching: anything worth keeping goes in with save_bookmark from inside the editor.
Search across platforms at once: one query covers X, Reddit, and LinkedIn together, which is usually where the answer actually lives.
If you are new to this, the connect Claude to your bookmarks walkthrough covers the same idea in a different client, and the ContextBolt bookmarks overview explains what the library does before you wire it into anything.
How to connect ContextBolt to Antigravity
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Get your MCP token from ContextBolt
Open the ContextBolt extension popup and click Settings. Under the MCP section, click Copy MCP Token. MCP is a Pro feature ($6/month) and cloud sync must be enabled in the same panel, otherwise the server connects but returns nothing.
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Open the raw MCP config
In Antigravity open Settings, then the Customizations tab, then Manage MCP Servers, then View raw config. That opens mcp_config.json in the editor. You can also reach it from the ... menu in the Agent panel under MCP Servers.
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Add the server and refresh
Under mcpServers add: "bookmarks": { "serverUrl": "https://api.contextbolt.app/mcp/YOUR_TOKEN" }. Save the file, then hit Refresh in the MCP Servers panel. Antigravity uses serverUrl for remote HTTP servers, not url, which is the usual reason nothing appears.
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Verify the connection
Ask the agent 'search my bookmarks for anything about rate limiting'. If it returns saves from X, Reddit, or LinkedIn, you are live. If it returns nothing at all, check cloud sync is on in the extension rather than assuming the config is wrong.
Example prompts for ContextBolt + Antigravity
Once connected, try asking Antigravity:
Semantic search across every platform you save from, so you describe what you need rather than recalling exact words.
Combines recency with meaning, useful when you know you saved something recently but not where or exactly what.
Pulls the saved material into the agent's context so the code it writes is grounded in what you already vetted.
Calls save_bookmark, so anything worth keeping goes into the same library without leaving the editor.
What you can do with ContextBolt in Antigravity
Search saved tweets, Reddit posts, and LinkedIn content by meaning
Filter by platform when you remember where you saved something
Surface saved material mid-task in the Agent Manager
Save new links to your library from inside Antigravity
Browse your automatic topic clusters
Works alongside any other MCP servers you have configured