GrantSonar

io.github.romulusfoundryPublished by GitHub account romulusfoundryv1.0.0Updated Oct 24, 2026

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

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingBusiness & Commerce

Overview

AI-generated overview

Lets an assistant search verified-open US grants from federal, state, and foundation sources through a read-only remote MCP endpoint.

What you can do
GrantSonar exposes a read-only MCP interface for finding US grant opportunities. According to the registry description, it searches grants that are verified as open across federal, state, and foundation sources. It is intended for AI agents, and the manifest lists no tools, so the exact tool names and parameters are not documented here.
When to use it
Use it when an assistant needs to look up currently open US grant opportunities, for example to support funding research or to check what federal, state, or foundation grants are available. It is not meant for submitting applications or changing grant data, since it is described as read-only. Skip it if you need non-US funding sources or detailed program administration.
Requirements
A remote streamable HTTP endpoint at No packages, environment variables, headers, or authentication are declared. Network access to that endpoint is required.
Before you install
The description states the server is read-only, so it should not modify data. No credentials, payments, or private keys are declared, and no environment variables or headers are requested. The registry description is the only available documentation; no README or tool list is provided, so verify the actual tool behavior and what queries are sent to the remote endpoint before relying on it.

Installation

In SourceWeft

  1. Open GrantSonar in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.romulusfoundry%2Fgrantsonar/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

README

This repository has no README.

Tools

2

search_grants

Search grants

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.

Parameterslimitqueryrequired

get_grant

Get grant detail

Fetch the full detail of a single grant opportunity by its GrantSonar grant_id (UUID), including synopsis, eligibility, deadlines, and award amounts.

Parametersgrant_idrequired

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.