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GrantSonar

Official registry Search and web

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

Source code

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http grantsonar 'https://grantsonar.com/api/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "grantsonar": {
            "type": "http",
            "url": "https://grantsonar.com/api/mcp"
        }
    }
}

Frequently asked questions

What is GrantSonar?

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

How do I install GrantSonar?

It runs as a remote server. In Claude Code: claude mcp add --transport http grantsonar 'https://grantsonar.com/api/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does GrantSonar need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is GrantSonar open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains GrantSonar?

It is published by romulusfoundry. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.