StringSpec MCP Server

by stringspec Your server? Claim it

answering

StringSpec is answering right now. Last checked 12 min ago. It exposes 4 tools. Last commit 7 Oct 2026.

Lab measurements of nearly 800 tennis strings: search, compare and get recommendations.

Uptime history 26 days of history

26 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

557 ms

Response time

average over 24h

Stars

last commit 7 Oct 2026

Nothing serious here today

Today is the operative word: we check StringSpec every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://stringspec.com/mcp

~/.codex/config.toml

[mcp_servers.mcp]
url = "https://stringspec.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "url": "https://stringspec.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://stringspec.com/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

compare

compare_strings

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.

recommend

recommend_strings

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.

string

get_string

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.

strings

search_strings

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.

Endpoints

URL	Transport	State	Latency	Checked
https://stringspec.com/mcp	streamable-http	answering	511 ms	12 min ago

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StringSpec — questions

Answers built from our own checks of this server.

What can StringSpec do?

It exposes 4 tools, read directly from the server on our last check. Among them: compare_strings, get_string, recommend_strings, search_strings. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is StringSpec working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 557 ms. The bar chart above shows every period we have measured.

How do I connect StringSpec?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does StringSpec need an API key?

No. StringSpec completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is StringSpec?

It answers our handshake in 557 ms on average, which is faster than 21% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is StringSpec open source?

The code is open source: it is published under the MIT licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at stringspec.com, which runs on its operator's own terms.