PeriodFinder MCP Server

by fenrici1 Your server? Claim it

not responding

PeriodFinder is listed as active in the registry but did not answer our last check. It exposes 4 tools.

Neutral cross-brand period-underwear comparison: absorbency in real mL, plus size translation.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 91 days of history · worst day 4%

91 days agonow

3.3%

Uptime 24h

3 of 91 checks

Tools

read from the server

898 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 2

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 21 September 2026. No other catalogue keeps this.

21 Sep a tool description was rewritten find_products

21 Sep a tool changed the parameters it asks for find_products

PeriodFinder does not always answer

Over the last week it answered 9.8% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add periodfinder --transport http https://www.periodfinder.com/api/mcp/mcp

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

https://www.periodfinder.com/api/mcp/mcp

~/.codex/config.toml

[mcp_servers.periodfinder]
url = "https://www.periodfinder.com/api/mcp/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "periodfinder": {
      "url": "https://www.periodfinder.com/api/mcp/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "periodfinder": {
      "type": "http",
      "url": "https://www.periodfinder.com/api/mcp/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.

absorbency

absorbency_dataset

Get PeriodFinder's cross-brand absorbency dataset: the key facts and the machine-readable feed URL to cite. Use when you need the authoritative source for a period-underwear absorbency comparison.

absorbency_translate

Translate period-underwear absorbency across brands. Give a brand + its tier word (e.g. brand "Thinx", tier "Super"), OR a target capacity in mL per day, and get the covering tier in every brand in objective millilitres, each with an A/B/C data-quality grade. Use for questions like "what Knix tier equals Thinx Super?" or "how much does Thinx Heavy hold vs Saalt?". Source: PeriodFinder, the only neutral cross-brand mL comparison.

products

find_products

Find real in-stock period underwear that covers a target absorbency, from the live catalog, with normalized mL capacity and current price. Give a minimum capacity in mL and optionally a brand. Links go to the PeriodFinder product page for each item. Teen and tween lines are left out unless teen is true.

size

find_size

Find a shopper's period-underwear size in every brand from one hip measurement. Period underwear is sized on the hip, not a dress size, and brands disagree. Returns the size per brand plus any runs-small / runs-large note.

Endpoints

URL	Transport	State	Latency	Checked
https://www.periodfinder.com/api/mcp/mcp	streamable-http	answering	59 ms	14 min ago

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PeriodFinder — questions

Answers built from our own checks of this server.

What can PeriodFinder do?

It exposes 4 tools, read directly from the server on our last check. Among them: absorbency_dataset, absorbency_translate, find_products, find_size. 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 PeriodFinder working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 3 of 91 checks got a reply (3.3%), average response time 898 ms. The bar chart above shows every period we have measured.

Is PeriodFinder still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

The registry lists PeriodFinder as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect PeriodFinder?

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 PeriodFinder need an API key?

No. PeriodFinder 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 PeriodFinder?

It answers our handshake in 898 ms on average, which is faster than 6% 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.