PeriodFinder
REMOTE · WWW.PERIODFINDER.COM · SCANNED SEP 20
Neutral cross-brand period-underwear comparison: absorbency in real mL, plus size translation.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security83
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability45
- 0% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Fail
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 472 tokens (~94/item across 5 items; 4 tools + 1 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the PeriodFinder MCP server?
PeriodFinder is a hosted endpoint at https://www.periodfinder.com/api/mcp/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · www.periodfinder.com
claude mcp add --transport http fenrici1-periodfinder 'https://www.periodfinder.com/api/mcp/mcp'
{
"mcpServers": {
"fenrici1-periodfinder": {
"url": "https://www.periodfinder.com/api/mcp/mcp"
}
}
} {
"servers": {
"fenrici1-periodfinder": {
"type": "http",
"url": "https://www.periodfinder.com/api/mcp/mcp"
}
}
} [mcp_servers.fenrici1-periodfinder] url = "https://www.periodfinder.com/api/mcp/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"fenrici1-periodfinder": {
"type": "remote",
"url": "https://www.periodfinder.com/api/mcp/mcp",
"enabled": true
}
}
} openclaw mcp add fenrici1-periodfinder --url 'https://www.periodfinder.com/api/mcp/mcp' --transport streamable-http
mcp_servers:
fenrici1-periodfinder:
url: "https://www.periodfinder.com/api/mcp/mcp" {
"McpServers": {
"fenrici1-periodfinder": {
"Transport": "http",
"Url": "https://www.periodfinder.com/api/mcp/mcp"
}
}
} assistant mcp add fenrici1-periodfinder -t streamable-http -u 'https://www.periodfinder.com/api/mcp/mcp'
{
"mcpServers": {
"fenrici1-periodfinder": {
"type": "http",
"url": "https://www.periodfinder.com/api/mcp/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 6 Sept 26 +6
- Authorization: unverified → partial ▲ security
- Tool “absorbency_dataset” changed its title: Cite the absorbency dataset cosmetic
- Tool “absorbency_translate” changed its title: Translate absorbency across brands cosmetic
- Tool “find_products” changed its title: Find in-stock products by absorbency cosmetic
- Tool “find_size” changed its title: Find your size in every brand cosmetic
- 26 Aug 26 +2
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- Stability: 0.97 → pass security
- 24 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 26 0
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Probed https://www.periodfinder.com/api/mcp/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=www.periodfinder.com | CN=YR1,O=Let's Encrypt,C=US | 13 Aug 2026 | 11 Nov 2026 | RSA 2048 | SHA256-RSA | 522ddacded65ab563c71d9779053438464a |
| SANs: www.periodfinder.com | ||||||
| CN=YR1,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | a20253f15f2691c05dc1ce13b9bcca4e |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC secure
Validation of www.periodfinder.com. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| periodfinder.com. | present | 60409 | 8 | Verified |
| www.periodfinder.com. | Verified address RRset verified with the apex keys |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000; includeSubDomains; preload |
| content-security-policy | default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: https://cdn.shopify.com https://xpobbruxpvfctycduhrt.supabase.co; font-src 'self' data:; connect-src 'self' https://xpobbruxpvfctycduhrt.supabase.co; frame-src 'none'; media-src 'self'; object-src 'none'; base-uri 'self'; form-action 'self'; frame-ancestors 'none'; upgrade-insecure-requests |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | origin |
| permissions-policy | camera=(), microphone=(), geolocation=(), interest-cohort=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.periodfinder.com/api/mcp/mcp | Verified | 200 | |
| http (plaintext) | http://www.periodfinder.com/api/mcp/mcp | HTTPS enforced | 308 | https://www.periodfinder.com/api/mcp/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
absorbency_dataset Cite the absorbency dataset ~47
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
absorbency_translate Translate absorbency across brands ~212
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.
| Name | Type | Req | Description |
|---|---|---|---|
| brand | string | – | A period-underwear brand, e.g. Thinx, Knix, Saalt, Modibodi, WUKA. |
| ml_per_day | number | – | Target real capacity in mL/day (alternative to brand+tier). A regular tampon holds about 5 mL, a super about 9 mL. |
| tier | string | – | The brand's absorbency tier word, e.g. Light, Moderate, Heavy, Super, Overnight. |
No output schema declared.
No examples provided.
find_products Find in-stock products by absorbency ~115
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.
| Name | Type | Req | Description |
|---|---|---|---|
| brand | string | – | Limit to one brand (optional). |
| limit | integer | – | How many products to return (default 6). |
| ml_min | number | – | Minimum real capacity to cover, in mL (e.g. 40 for a heavy day). |
No output schema declared.
No examples provided.
find_size Find your size in every brand ~92
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.
| Name | Type | Req | Description |
|---|---|---|---|
| hip_cm | number | – | Hip measurement in centimetres (alternative to inches). |
| hip_inches | number | – | Hip measurement in inches (fullest part of hips and seat). |
No output schema declared.
No examples provided.
What is the PeriodFinder MCP server?
PeriodFinder is an MCP server listed in the public MCP registry as io.github.fenrici1/periodfinder. Neutral cross-brand period-underwear comparison: absorbency in real mL, plus size translation. This page covers its hosted endpoint (https://www.periodfinder.com/api/mcp/mcp).
Is the PeriodFinder MCP server safe to use?
PeriodFinder scores 83 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the PeriodFinder MCP server expose?
PeriodFinder exposes 4 tools: absorbency_translate, find_size, find_products, absorbency_dataset. Their descriptions and schemas cost roughly 466 tokens of context every time the server is loaded.
Does the PeriodFinder MCP server require authentication?
No. We connected to PeriodFinder without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the PeriodFinder MCP server still maintained?
PeriodFinder is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.