MCP.Market

StringSpec MCP server

online · 100% uptime
by stringspec.com·com.stringspec/mcp·v1.0.0
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Lab measurements of nearly 800 tennis strings: search, compare and get recommendations.

A87/100grade A
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Safety scan
A87/100

full report

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StringSpec tools (4)

write = sends, deletes, buys or posts
  • compare_stringsFree

    Side-by-side measurements, percentiles, prices and buy links for 2 or 3 strings by name, with the StringSpec comparison page when there are two.

  • get_stringFree

    Everything StringSpec has on one string, found by name (misspellings and missing gauges are fine): every measurement with its database percentile, elongation at 40, 51 and 62 lb, an estimated playable life, a tension adjustment versus the player's usual, how it ranks for each playing need (spin, comfort, control, power, tension hold, durability, feel), the closest alternatives, the retail price and a buy link. When the name matches several strings it returns the best match and lists the others.

  • recommend_stringsFree

    Rank the database for what a player wants, with StringSpec's string finder: one main need and an optional second one (spin (More spin and shape), comfort (Easier on my arm), control (More control, less launch), power (More power and depth), hold (Plays the same for longer), durable (Lasts longer before it breaks), feel (Best feel and touch)), adjusted for the racquet (string pattern, head size, frame stiffness) and with a material ruled out if asked. Returns a shortlist with a 0-100 fit, why each string fits, its price and buy link, and the finder link with the same answers filled in. For arm or elbow pain use need "comfort", and avoid "poly" when the player wants no polyester.

  • search_stringsFree

    Search 791 lab-measured tennis strings by name, brand, material and gauge, sorted by a measurement or by price. Each result carries stiffness (lb/in), tension loss (%), energy return (%), spin potential, ball bite and string friction, each with its percentile in the database, plus the current retail price, a buy link and the StringSpec page. Returns at most 10 strings; narrow the filters rather than asking for more.

Public scan report

scanner v0.1.10 · 2026-10-13 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 2759ms17/20
  • Tool poisoning4 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 7 days ago15/15
  • Maintainer identityendpoint served from the registry-verified namespace domain8/10
Overall 87/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How StringSpec compares

Against every graded Web search MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
87/100
higher than 78% of 3,470 Web search servers
Tools
4
the typical Web search server has 5
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote Web search server answers 100%
Response time
15 ms
faster than 99% of 2,238 Web search servers

What its tools let an agent do: 4 read

Install StringSpec in Claude Code, Cursor or VS Code

claude mcp add --transport http mcp https://stringspec.com/mcp
Add to Cursor

What the publisher says

From the StringSpec repository's README, as published. We do not edit it. Read it on GitHub

StringSpec for Claude and other MCP clients

Ask an AI assistant about tennis strings and get answers from lab measurements instead of marketing copy: how stiff a string is, how fast it loses tension, how much energy it returns, how much spin it allows, and which strings suit a player's needs and racquet.

This repository holds:

  • the connection details for the StringSpec remote MCP server at https://stringspec.com/mcp,
  • a Claude plugin that adds that server plus a string-research skill, which teaches Claude how to read the numbers.

The server is run by StringSpec, a database of nearly 800 tennis strings measured on the same machine under the same protocol, so one string's numbers compare fairly with another's. How the numbers are made: methodology.

What you can ask

  • "Which polyester strings are the softest, and what do they cost?"
  • "How fast does Solinco Hyper-G 16 lose tension, and how long will it stay playable?"
  • "Compare RPM Blast 17 with Luxilon ALU Power 16L."
  • "I have tennis elbow and a stiff racquet. What should I string, without natural gut?"
  • "What should I string for more spin on an 18x20 racquet?"

Tools

All tools are read-only (readOnlyHint: true) and need no account.

Every answer separates measurements from estimates (playable life, tension advice and fit are derived from the measurements) and dates each price.

Setup

Claude (claude.ai, Desktop, mobile)

Settings → Connectors → Add custom connector, then paste https://stringspec.com/mcp. No sign-in is needed.

Claude Code

Install the plugin, which adds the server and the string-research skill:

/plugin marketplace add BigBalli/stringspec-mcp
/plugin install stringspec@stringspec

Or add only the server:

claude mcp add --transport http stringspec https://stringspec.com/mcp

Other MCP clients

Any client that supports remote MCP servers over Streamable HTTP can use https://stringspec.com/mcp with no credentials. The server speaks protocol versions 2026-07-28, 2025-11-25, 2025-06-18 and 2025-03-26 and answers with JSON (no SSE, no sessions).

Privacy

The server receives the tool name and its arguments (for example a string name or "comfort"), uses them to answer, and does not store them. It never sees your conversation or your account. Full policy: stringspec.com/privacy.

Support

Email g@bigballi.com, or see stringspec.com/connect.

License

The contents of this repository are released under the MIT License. The data served by the StringSpec MCP server is not part of this repository and is not covered by that license.

Nothing above is checked by us. What we check is on the safety report.

StringSpec: common questions

Is StringSpec MCP server safe?
Yes, by our scan: it is graded A (87/100). Read the StringSpec safety report
How do I install StringSpec?
It runs remotely at stringspec.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does StringSpec need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is StringSpec maintained?
The last commit was 28 days ago (2026-10-07). The latest release is v1.0.0.
Is StringSpec up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of StringSpec?
Servers from other publishers that do the same job: Semantic Scholar MCP Server.
How does StringSpec compare with other Web search MCP servers?
safety score 87/100 (higher than 78% of 3,470 Web search servers); tools 4 (the typical Web search server has 5); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to StringSpec

Same job from other publishers: the closest match first, then the best rated.

  • Semantic Scholar MCP Server
    MCP server for the Semantic Scholar API: search 200M+ papers, citations, authors, recommendations.
    B