MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

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

Read-only probes

MCP server · Payments & trading

API Change Feed

What broke since your version, for 60 popular APIs/SDKs. Free quick check; full reports via x402.

Checks passed
12 / 22

2 failed · 8 not measured

Median response
1062 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
6

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?
310
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 1062 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name api-change-feed.

  • Pass
    Lists tools

    tools/list returned 6 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 1062 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 1062 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

    8 of 10 parameters have a description (80%). The bar is 80%.

  • Fail
    Safety hints

    6 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.

  • 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 2026-11-06T05:15:50.476407Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Start using API Change Feed

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 api-change-feed https://changefeed.dev/mcp

Capabilities

Tools 6

digest

Everything breaking, deprecated or security-related across all tracked sources since a date, grouped by source. Costs $0.02 (x402, USDC).

Discovered
get_changes

Normalized change records (breaking, deprecation, security, release) for one tracked API/SDK or all of them, filterable by date and kind. Costs $0.005 (x402, USDC).

Discovered
list_sources

List the 60 APIs/SDKs we track and the package names to query them by. Free.

Discovered
preview_changes

Latest five breaking/deprecation/security headlines across all sources, to check freshness. Free.

Discovered
quick_check

Free. Before writing code against a library you may know only from older training data, check whether it changed since that version: verdict, major versions crossed, how many breaking changes, deprecations and security fixes, and the top three breaking headlines. Call upgrade_check (paid) for the full details with evidence.

Discovered
upgrade_check

What changed in a package since the version your code targets: breaking changes, deprecations, security fixes and major versions crossed, with the sentence that triggered each label. Call this before writing code against a library you may know only from older training data. Costs $0.01 (x402, USDC).

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected1062 ms6