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Use Emboss in Antigravity

Emboss runs an MCP server at https://api.getemboss.ai/mcp. Connect it once and fill PDF forms from a conversation: make a flat PDF fillable, fill it from notes or documents you paste or attach, or fill it for every row of a spreadsheet. Sign in with an Emboss account when prompted. Emboss is not yet listed in Antigravity's plugin directory, at the time of writing.

Connect

Antigravity's CLI and IDE both read MCP server configuration from mcp_config.json, where remote servers use serverUrl rather than url or httpUrl:

{
  "mcpServers": {
    "emboss": {
      "serverUrl": "https://api.getemboss.ai/mcp"
    }
  }
}

You can also install the connector as an Antigravity plugin:

git clone https://github.com/GetEmboss-ai/emboss-gemini-extension
agy plugin install ./emboss-gemini-extension

Availability

At the time of writing, the Antigravity CLI does not send OAuth tokens to HTTP MCP servers (see antigravity-cli issue #25). Until that issue is fixed, add an Emboss API key (see Authentication) as a header in mcp_config.json instead of relying on sign-in:

{
  "mcpServers": {
    "emboss": {
      "serverUrl": "https://api.getemboss.ai/mcp",
      "headers": {
        "Authorization": "Bearer sk_..."
      }
    }
  }
}

What you can do

  • Make a flat PDF fillable. Attach a PDF and ask Antigravity to detect its fields; see the MCP tools reference for create_form.
  • Fill a form from context. Attach a form and one or more context documents; see fill_form_from_context for how the match works.
  • Fill a form for every row in a spreadsheet. Attach a form and a spreadsheet; see fill_batch for the mapping and row output.

Billing and privacy

Free tier: The first 5 form creations, 5 context fills, 5 standard fills, 5 verifications, 5 reads, and 5 packages each month are free when the job is 5 pages or fewer (a context fill counts the form and its documents together); a longer job is charged and does not use a free one. See Pricing for current rates. Only the arguments a tool call needs are sent to Emboss. Disconnect at any time from Dashboard, then Account, then Connected apps. A connection made with an API key is not listed there: revoke or turn off the key on the API Keys page instead.