MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Data access / search

GrantCue

By grantcue.com Verified namespace

Search public US grants and foundation profiles from IRS filings. Read-only, no sign-in.

WebsiteSearch & web data
Connect to GrantCue
Checks passed
13 / 22

1 failed · 8 not measured

Median response
1069 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
4

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
312

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 1069 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name grantcue.

  • Pass
    Lists tools

    tools/list returned 4 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 1069 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 1069 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    18 of 18 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Fail
    Source repo linked

    No repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-10-28T19:12:06.671742Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Start using GrantCue

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http grantcue https://www.grantcue.com/api/v1/mcp

Capabilities

Tools 4

get_funder

A foundation’s public GrantCue profile, from the latest Form 990-PF, or Form 990 Schedule I for community foundations and other grantmaking charities: giving totals, typical and median grant, giving by year, where it gives, the 25 largest grants its latest filings report, and for a 990-PF filer how to apply. For a Form 990 funder: its kind, the latest tax year, totals and the top 10 recipients (yearly totals); Form 990 does not say whether it accepts applications. Only foundations with a public profile, and funders with a Schedule I return, are found. It never returns the full list of reported grants.

Discovered
get_grant

One public catalog grant in full: dates, amounts, eligibility, and links to the funder’s own pages. A grant that is not publicly listed is not found.

Discovered
search_funders

Search the foundations that have a public GrantCue profile (built from the latest Form 990-PF, or Form 990 Schedule I for community foundations and other grantmaking charities), largest givers first. Search by name, city, state or EIN, by the state they mainly give to, or for those that publish how to apply. Form 990 grantmakers are found by name, state or EIN, after the 990-PF matches, each marked source_form "990". Returns 10 per page.

Discovered
search_grants

Search the public GrantCue grant catalog (federal, state, local and foundation opportunities) with the same filters as the Discover page. Returns a short page of matches, at most 25, and can reach the first 100 results of a search. Grant text is provided by the funders.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected1069 ms4

Related servers

All alternatives

Same function and industry, ranked by checks passed then median latency.

Explore alternatives to GrantCue