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

The Spool List

Find makers, open jobs, shop items and designs on The Spool List fabrication marketplace.

Checks passed
13 / 22

1 failed · 8 not measured

Median response
580 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
9

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

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 580 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name the-spool-list.

  • Pass
    Lists tools

    tools/list returned 9 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 580 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 580 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

    26 of 27 parameters have a description (96%). 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 2026-11-09T21:34:09.745371Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Start using The Spool List

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 the-spool-list https://api.thespoollist.com/mcp/public

Capabilities

Tools 9

browse_open_jobs

Use when a maker or creator asks for work, commissions or gigs they could take on: lists open jobs buyers have posted (title, country, budget, when posted). Buyer identities and full briefs stay private; makers sign up free to see details and quote.

Discovered
create_job_request_link

Use when someone wants something made and is ready to get quotes, or asks how to hire a maker: turns their description into a pre-filled job post link on The Spool List. Nothing is posted: the user opens the link, reviews the brief, adds photos or files and posts it (free for buyers); makers reply with quotes, and payment protection covers the buyer.

Discovered
estimate_job_cost

Use when someone asks how much it would cost to have something made, printed, machined or commissioned: a ballpark price range from The Spool List rate cards (hourly rate by discipline, complexity, materials, setup, quantity). Indicative, not a quote: makers set their own prices. Pair with create_job_request_link to get real quotes.

Discovered
find_local_services

Use when someone needs a local business near a city: finishing, welding and fabrication, design and CAD, packing and shipping, electronics repair, sewing and alterations, carpentry, architecture and other trades. Returns business name, category, area and a listing link; contact details stay on the listing page.

Discovered
get_maker_profile

Use when the user names a maker or asks for more about one from search_makers: their public profile by handle (location shown, verification and trust badges, rating, reviews, jobs completed, whether they take design jobs, shop links). An unknown handle returns found: false; use search_makers to find the right one.

Discovered
list_categories

Reference lists for the other tools: job categories for create_job_request_link, disciplines with base hourly rates for estimate_job_cost, the number of live shop items, and shop markets with item counts. Call it when unsure which category or discipline fits.

Discovered
search_design_library

Use when someone wants an STL or design file to 3D print or make, or wants ideas before commissioning: searches The Spool List design library. Returns title, designer, licence, price, access ("download" for files The Spool List hosts, "view_only" for third-party models such as Sketchfab that can be viewed but not downloaded here) and a design page link. No printer? create_job_request_link gets any design made by a maker.

Discovered
search_makers

Use when someone wants to find a person to make, print, build, repair or customise something: a 3D print or replacement part, a cosplay costume or prop, miniatures or miniature painting, CNC or laser work, woodwork, sewing, metalwork and more. Searches independent makers on The Spool List by skill, machine, material, name or shop, optionally near a country or city. Returns name, handle, city and country, jobs completed, materials and a profile link.

Discovered
search_shop_items

Use when someone wants to buy something handmade or 3D-printed that already exists (a gift, decor, figurine, prop, part or accessory) rather than commission it: searches items makers sell in The Spool List shop. Returns title, price, maker and a link to the item page.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected580 ms9