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

Read-only probes

MCP server · Data access / search

Marks & Signatures

By marksandsignatures.com Verified namespace

Identify marks on pottery, silver, jewelry and glass, and look up their makers.

WebsiteSource code
Connect to Marks & Signatures
Checks passed
15 / 22

0 failed · 7 not measured

Median response
598 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
5

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?
103
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?
402

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 497 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name marksandsignatures-com.

  • Pass
    Lists tools

    tools/list returned 5 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 598 ms over 2 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 688 ms over 2 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    2 of 2 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Pass
    Stable tool list

    No tool was removed and no required parameter was added in the last 30 days.

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.

  • 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.

  • Pass
    Recently updated

    Updated 2026-11-06T18:00:44.303976Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using Marks & Signatures

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 marks-signatures https://marksandsignatures.com/api/mcp

Capabilities

Tools 5

find_makers

Searches makers and their aliases by name across pottery, silver, jewelry, glass and other maker marks, optionally within one category or country. Returns pages of makers with place, active years, number of marks and an example mark image.

Discovered
get_details

Returns the full public record for one mark or one maker: wording, type, period and dating notes for a mark; history, aliases, what to look for and look-alike makers for a maker. Includes links to the matching pages on Marks & Signatures.

Discovered
get_maker_marks

Returns the marks of one maker with images, wording, type and period, in date order. Accepts a maker id or a mark id; with a mark id that mark comes first.

Discovered
identify_mark

Ranks catalogue marks that match a description of a mark: visible wording or letters, symbols, outline shape, colour, how it was made, category, country and years of use. Returns pages of marks with maker, image, period and the details that matched, plus a link to the same search on Marks & Signatures.

Discovered
list_categories

Lists the five mark categories with the number of marks and makers in each and a link to each category page.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected497 ms5
Connected698 ms5

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