MCP server

GrantSonar

io.github.romulusfoundry/grantsonar

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Search verified-open US grants (federal, state, foundation). Read-only MCP for AI agents.

Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

2

Token cost

About 304 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http grantsonar https://grantsonar.com/api/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.grantsonar]
url = "https://grantsonar.com/api/mcp"

Gemini CLI

{"mcpServers":{"grantsonar":{"httpUrl":"https://grantsonar.com/api/mcp"}}}

Cursor

{"mcpServers":{"grantsonar":{"url":"https://grantsonar.com/api/mcp"}}}

VS Code

{"servers":{"grantsonar":{"type":"http","url":"https://grantsonar.com/api/mcp"}}}

Antigravity

agy mcp add grantsonar https://grantsonar.com/api/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"grantsonar","server_url":"https://grantsonar.com/api/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"grantsonar","server_url":"https://grantsonar.com/api/mcp"}

Tools

• get_grant ~102 tokens
  Fetch the full detail of a single grant opportunity by its GrantSonar grant_id (UUID), including synopsis, eligibility, deadlines, and award amounts.
• search_grants ~202 tokens
  Search open grant opportunities in the GrantSonar corpus (federal, state, and foundation grants). Uses semantic similarity over a plain-English description of the project or need, with a keyword fallback. Returns title, agency, deadline, award amounts, similarity score, and a GrantSonar URL per hit.

Browse

• GitHub tools
• GitHub and code hosting

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