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 · Other

xmp4 — Semantic code knowledge for your stack

By example4.ai Verified namespace

OSS libs in your stack, really used: source, tests, callers. C#, Java, TS, Python, Rust, PHP+.

WebsiteSource codeDeveloper tools & code
Connect to xmp4 — Semantic code knowledge for your stack
Checks passed
12 / 22

3 failed · 7 not measured

Median response
197 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
16

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?
410
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?
310
Publisher identityCan the publisher be traced to its source?
411

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 197 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-03-26, serverInfo.name xmp4.

  • Pass
    Lists tools

    tools/list returned 16 tools.

  • Fail
    Current protocol

    Negotiated 2025-03-26. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 197 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 197 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

    86 of 86 parameters have a description (100%). The bar is 80%.

  • Fail
    Safety hints

    16 tools set neither readOnlyHint nor destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Pass
    Source repo linked

    A 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.

  • Fail
    Recently updated

    Updated 2026-04-23T22:09:33.915723Z, which is older than 180 days.

  • Pass
    Open-source licence

    GitHub reports an OSI licence.

Start using xmp4 — Semantic code knowledge for your stack

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 xmp4-semantic-code-knowledge-for-your-stack https://mcp.example4.ai/mcp

Capabilities

Tools 16

xmp4_callees

Find direct callees (methods called by) a symbol in a project. Navigate step-by-step by calling xmp4_callees again on interesting results.

Discovered
xmp4_callers

Find direct callers of a symbol in a project. Navigate step-by-step by calling xmp4_callers again on interesting results.

Discovered
xmp4_deps

List external dependencies of a project.

Discovered
xmp4_grep

Server-side regex text search over indexed project source files. Free tier: requires file_path (single file). Premium tier (XMP4_PREMIUM_GREP_WALK=true): allows file_glob multi-file walk. Prefer xmp4_tests_for/xmp4_usages for SCIP symbols — grep is for text not indexed (comments, literals, config keys).

Discovered
xmp4_guide

Usage guide for xmp4 tools — read this first to learn the correct workflow

Discovered
xmp4_hierarchy

Get type hierarchy (base, interfaces, derived) for a symbol in a project.

Discovered
xmp4_info

Get detailed information about a symbol in a project.

Discovered
xmp4_outline

Get outline (all symbols) for a file in a project.

Discovered
xmp4_projects

Search and browse projects by language and name. Use this first to discover projects, then use other tools with the repo name.

Discovered
xmp4_search

Search symbols in a project. Use xmp4_projects first to find the project identifier.

Discovered
xmp4_server

Get server information, version, and capabilities

Discovered
xmp4_source

Extract source code for a symbol in a project.

Discovered
xmp4_symbol_at

LSP-style position→symbol lookup. Given (file_path, line, column) returns the symbol whose occurrence covers that cursor position. line is 1-based; column is 0-based. Use after xmp4_outline/xmp4_view when you know coordinates and want the canonical symbol.

Discovered
xmp4_tests_for

Find direct tests that exercise a given symbol (direct callers filtered to test-file candidates per language pattern: CSharp/Java/PHP: *Test(s).<ext>; Python: test_*.py / *_test.py; TypeScript/JavaScript: *.spec/test.{ts,js}; Rust: *_tests.rs / tests/; etc.).

Discovered
xmp4_usages

Find all usages/references of a symbol in a project.

Discovered
xmp4_view

Read a raw file excerpt from an indexed project by line range. Use after xmp4_search/xmp4_outline locates the region of interest, or to expand a truncated xmp4_source snippet. Hard cap of 500 lines per call.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected197 ms16

Related servers

All alternatives

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

  • Responded16 / 22 checks passed
    Catalyst evidence graph

    catalystproject.aiVerified

    Findings on what compounds and supplements do in the body, with evidence strength, quote and paper.

    OtherOther

    • Passed: Handshake
    • Passed: Tools listed
    • Passed: Updated recently

    Median latency 699 ms · Last checked

  • Responded15 / 22 checks passed
    wcway

    wcway.comVerified

    Find the nearest public toilet worldwide. Read-only tools, no account, no API key.

    OtherOther

    • Passed: Handshake
    • Passed: Tools listed
    • Passed: Updated recently

    Median latency 49 ms · Last checked

  • Responded15 / 22 checks passed
    Pick My Costume

    pickmycostume.comVerified

    Recommends Halloween costumes you can actually build, with step-by-step DIY build guides.

    OtherOther

    • Passed: Handshake
    • Passed: Tools listed
    • Passed: Updated recently

    Median latency 57 ms · Last checked

  • Responded15 / 22 checks passed
    Routine Run: write a routine

    routinerun.comVerified

    Write a step-by-step routine and get a link that opens it in Routine Run on iPhone. No sign-in.

    OtherOther

    • Passed: Handshake
    • Passed: Tools listed
    • Passed: Updated recently

    Median latency 62 ms · Last checked

Explore alternatives to xmp4 — Semantic code knowledge for your stack