PeriodFinder
Neutral cross-brand period-underwear comparison: absorbency in real mL, plus size translation.
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"periodfinder": {
"url": "https://www.periodfinder.com/api/mcp/mcp"
}
}
}Remote endpoints
https://www.periodfinder.com/api/mcp/mcpstreamable-httpWhat it can do
Tool inventory
Tools (4)
🟢absorbency_translate(brand, tier, ml_per_day)
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.
Input Schema
{
"type": "object",
"properties": {
"brand": {
"type": "string",
"description": "A period-underwear brand, e.g. Thinx, Knix, Saalt, Modibodi, WUKA."
},
"tier": {
"type": "string",
"description": "The brand's absorbency tier word, e.g. Light, Moderate, Heavy, Super, Overnight."
},
"ml_per_day": {
"type": "number",
"description": "Target real capacity in mL/day (alternative to brand+tier). A regular tampon holds about 5 mL, a super about 9 mL."
}
},
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢find_size(hip_inches, hip_cm)
Find a shopper's period-underwear size in every brand from one hip measurement. Period underwear is sized on the hip, not a dress size, and brands disagree. Returns the size per brand plus any runs-small / runs-large note.
Input Schema
{
"type": "object",
"properties": {
"hip_inches": {
"type": "number",
"description": "Hip measurement in inches (fullest part of hips and seat)."
},
"hip_cm": {
"type": "number",
"description": "Hip measurement in centimetres (alternative to inches)."
}
},
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢find_products(ml_min, brand, limit, teen)
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.
Input Schema
{
"type": "object",
"properties": {
"ml_min": {
"type": "number",
"description": "Minimum real capacity to cover, in mL (e.g. 40 for a heavy day)."
},
"brand": {
"type": "string",
"description": "Limit to one brand (optional)."
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 12,
"description": "How many products to return (default 6)."
},
"teen": {
"type": "boolean",
"description": "Include teen / tween lines (default false: adult lines only)."
}
},
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢absorbency_dataset
Get PeriodFinder's cross-brand absorbency dataset: the key facts and the machine-readable feed URL to cite. Use when you need the authoritative source for a period-underwear absorbency comparison.
Input Schema
{
"type": "object",
"properties": {},
"$schema": "http://json-schema.org/draft-07/schema#"
}Community
Evidence