GrantSonar MCP Server

by romulusfoundry Your server? Claim it

answering

GrantSonar is answering right now. Last checked 4 min ago. It exposes 2 tools.

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

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 91 days of history · worst day 93%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

475 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 7

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 22 October 2026. No other catalogue keeps this.

22 Oct 7 tools disappeared dismiss_grant, draft_application_section, get_my_application and 4 more

Tools have disappeared from this server

A tool that vanishes takes a piece of your agent with it, and the change arrives silently. Watch this server and every such change lands in your inbox.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://grantsonar.com/api/mcp

~/.codex/config.toml

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

.cursor/mcp.json

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

.vscode/mcp.json

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

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

grant

get_grant

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

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.

Tools removed

Tools this server used to expose. Anything built against them stopped working on the day they went.

dismiss_grant

removed 22 Oct 2026

draft_application_section

removed 22 Oct 2026

get_my_application

removed 22 Oct 2026

list_my_applications

removed 22 Oct 2026

list_my_matches

removed 22 Oct 2026

save_grant

removed 22 Oct 2026

update_application_section

removed 22 Oct 2026

Endpoints

URL	Transport	State	Latency	Checked
https://grantsonar.com/api/mcp	streamable-http	answering	324 ms	4 min ago

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GrantSonar — questions

Answers built from our own checks of this server.

What can GrantSonar do?

It exposes 2 tools, read directly from the server on our last check. Among them: get_grant, search_grants. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is GrantSonar working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 475 ms. The bar chart above shows every period we have measured.

Did GrantSonar ever remove tools?

Yes. dismiss_grant, draft_application_section, get_my_application, list_my_applications and 3 more are no longer exposed — we recorded the date each one disappeared. A tool vanishing usually means a breaking change for anything that depended on it.

Is GrantSonar still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect GrantSonar?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does GrantSonar need an API key?

No. GrantSonar completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is GrantSonar?

It answers our handshake in 475 ms on average, which is faster than 26% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.