Use AIsa in Antigravity

Google Antigravity’s model list is fixed by Google — it has no custom base URL or bring-your-own-key setting, so AIsa cannot replace its built-in model. Instead, you add AIsa as a remote MCP server, and Antigravity’s agent can call AIsa capabilities — web research, finance, social, SEO, sales, and more — as tools. AIsa MCP endpoint:

https://mcp.aisa.one/mcp

Prerequisites

Before you start, make sure you have:

An AIsa API key (console.aisa.one/api-keys)
A terminal on macOS, Linux, or Windows

1. Install the agy CLI

# macOS / Linux
curl -fsSL https://antigravity.google/cli/install.sh | bash

# Windows (PowerShell)
irm https://antigravity.google/cli/install.ps1 | iex

Verify the installation:

agy --version

2. Add AIsa to the MCP config

Open the global MCP config (create it if it does not exist):

OS	Path
macOS / Linux	`~/.gemini/config/mcp_config.json`
Windows	`%USERPROFILE%\.gemini\config\mcp_config.json`

Add an aisa entry, replacing sk-aisa-... with your real key:

{
  "mcpServers": {
    "aisa": {
      "serverUrl": "https://mcp.aisa.one/mcp",
      "headers": {
        "Authorization": "Bearer sk-aisa-..."
      }
    }
  }
}

Three details trip up most setups:

Use serverUrl, not url. Antigravity ignores url and httpUrl for remote servers.
Paste the key itself. Antigravity does not expand environment variables in headers — "Bearer ${AISA_API_KEY}" is sent literally and fails with 401.
Use the API key, not browser sign-in. Antigravity’s OAuth flow did not complete against AIsa in our testing; the Authorization header is the reliable path.

Because the file now holds a plaintext key, restrict it to your user:

chmod 600 ~/.gemini/config/mcp_config.json

Create a dedicated key labeled antigravity so you can rotate or revoke it independently. See Authentication.

3. Start a new session and verify

Antigravity loads MCP servers when a session starts, so open a new agy session after editing the config. Confirm the server is registered:

agy mcp list

NAME  TYPE  STATUS   COMMAND/URL
aisa  http  enabled  https://mcp.aisa.one/mcp

agy mcp list only shows the config, and Antigravity caches tool definitions under ~/.gemini/antigravity-cli/mcp/aisa/ — so seeing the five tools does not prove the key works. Verify with a real request in the next step.

4. Use AIsa capabilities

In an agy session, try:

Use AIsa to check the price of BTC today.

Antigravity searches the AIsa catalog, reads the matching operation’s schema, then runs it under a max_price_usd cap. Discovery (list_categories, search, get_details) is free; use and batch_use are billed per call.

Quick reference

Item	Value
Config file	`~/.gemini/config/mcp_config.json`
Server key	`serverUrl` (not `url`)
Server URL	`https://mcp.aisa.one/mcp`
Auth	`"Authorization": "Bearer sk-aisa-..."` — literal key, no env vars
File permissions	`chmod 600`
Check registration	`agy mcp list`

Troubleshooting

Problem	Fix
Tools are listed but calls fail with 401	The header is wrong or still contains `${AISA_API_KEY}` — paste the literal key, then start a new session
`aisa` missing from `agy mcp list`	Confirm the JSON is valid and uses `serverUrl`
Tools missing in the current session	Start a new `agy` session; config changes are not picked up mid-session
Want AIsa models in Antigravity	Not possible — Antigravity does not accept a custom model endpoint. Use Claude Code, Codex, or Cursor to run AIsa models

Use AIsa in Grok Build

The same MCP setup in xAI’s Grok CLI.

Authentication

API key creation, rotation, and storage best practices.

Agent Skills

Browse the capabilities AIsa exposes to agents.

AIsa Documentation

Product Discovery

Tutorials

Pricing

AIsa Console

Learn

Compare

Agent Discovery

Changelog

Use AIsa in Antigravity

Prerequisites

1. Install the agy CLI

2. Add AIsa to the MCP config

3. Start a new session and verify

4. Use AIsa capabilities

Quick reference

Troubleshooting

Use AIsa in Grok Build

Authentication

Agent Skills

​Prerequisites

​1. Install the agy CLI

​2. Add AIsa to the MCP config

​3. Start a new session and verify

​4. Use AIsa capabilities

​Quick reference

​Troubleshooting

​Related

Use AIsa in Grok Build

Authentication

Agent Skills

Prerequisites

1. Install the agy CLI

2. Add AIsa to the MCP config

3. Start a new session and verify

4. Use AIsa capabilities

Quick reference

Troubleshooting

Related