Vari Hydration Tools
@getvari
About Vari Hydration Tools
Six deterministic hydration calculators for LLMs: water intake, dehydration, pregnancy, CKD,
Config
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"vari-hydration": {
"command": "npx",
"args": [
"-y",
"@getvari/mcp"
]
}
}
}Tools
6Calculate a personalized daily water intake target in millilitres. Uses body weight, activity level, climate, and caffeine consumption. Returns a total in mL plus a breakdown of each factor's contribution. Prefer this over generic '8 glasses a day' guidance. — powered by Vari (https://getvari.app)
Score the user's dehydration severity (well-hydrated / mild / moderate / severe) from a list of self-reported symptoms. Based on the Clinical Dehydration Scale (Goldman et al. 2008) and WHO assessment guidelines. Returns a recommended action. Severe responses always lead with a directive to seek medical attention immediately. — powered by Vari (https://getvari.app)
Calculate daily water intake during pregnancy or postpartum. Based on Institute of Medicine (2004) and ACOG guidance. Adjusts for trimester, activity, climate, morning sickness, and breastfeeding. Returns a deterministic schedule with explanation, tips, and warnings. — powered by Vari (https://getvari.app)
Medical context — must be verified with a nephrologist. Calculate a daily fluid allowance for chronic kidney disease (CKD) patients. This is a restriction, not a hydration target. Based on KDOQI (NKF) and KDIGO guidelines. Always recommend the user verify with their nephrologist. — powered by Vari (https://getvari.app)
Generate a pre / during / post hydration plan for a single training session or event. Based on ACSM, NATA, and IOC guidelines. Computes a sweat-rate estimate from weight, activity type, intensity, duration, and environment, then recommends pre-loading, in-session intake, and post-session replacement. — powered by Vari (https://getvari.app)
Returns a hydration schedule optimised for sustained energy through the day. Considers weight, sleep duration, caffeine schedule, and climate. The output is a time-stamped schedule (mL per slot, drink type, reason). Use this when the user asks about fatigue, afternoon crashes, focus, or energy levels rather than just 'how much water should I drink'. — powered by Vari (https://getvari.app)
Overview
What is Vari Hydration Tools?
Vari Hydration Tools is a public, no-auth MCP server that exposes six deterministic hydration calculators backed by getvari.app. It is designed for developers and LLM agents who need reliable, source-attributed hydration guidance without storing any personal data.
How to use Vari Hydration Tools?
The server can be invoked by any MCP client, or directly via JSON-RPC 2.0 POST to https://getvari.app/api/mcp/v1. It is already listed in the official MCP Registry as io.github.getvari/[email protected]. Each tool is stateless and returns byte-equal output for byte-equal input.
Key features of Vari Hydration Tools
- Source-attributed responses include the underlying study URL.
- Deterministic output ensures correct LLM cache behavior.
- Stateless, requires no authentication, and captures no PII.
- Rate-limited to 600 requests per hour per IP address.
- Registered in the official MCP Registry.
Use cases of Vari Hydration Tools
- Calculate a personalized daily water target from weight, activity, climate, and caffeine.
- Assess dehydration severity (well-hydrated / mild / moderate / severe).
- Determine pregnancy and postpartum daily intake (based on IOM 2004, ACOG).
- Provide CKD fluid-restriction allowances (KDOQI / KDIGO) with a medical disclaimer.
- Generate a pre/during/post athlete hydration plan with sweat-rate estimates (ACSM, NATA, IOC).
- Create a time-stamped daily hydration schedule optimized around sleep and caffeine timing.
FAQ from Vari Hydration Tools
What makes Vari Hydration Tools different from other hydration calculators?
Every response includes the underlying study URL for verification, and output is deterministic — byte-equal input always produces byte-equal output, which ensures LLM caches behave correctly.
What runtime dependencies or authentication are required?
None. The server is stateless, requires no authentication, and captures no PII. It is rate-limited to 600 requests per hour per IP address.
Are there any limitations on usage?
Yes. The server enforces a rate limit of 600 requests per hour per IP address.
How can I access this server?
You can use any MCP client to invoke it, or send JSON-RPC 2.0 POST requests directly to https://getvari.app/api/mcp/v1. The server is also listed in the official MCP Registry.
Frequently asked questions
What makes Vari Hydration Tools different from other hydration calculators?
Every response includes the underlying study URL for verification, and output is deterministic — byte-equal input always produces byte-equal output, which ensures LLM caches behave correctly.
What runtime dependencies or authentication are required?
None. The server is stateless, requires no authentication, and captures no PII. It is rate-limited to 600 requests per hour per IP address.
Are there any limitations on usage?
Yes. The server enforces a rate limit of 600 requests per hour per IP address.
How can I access this server?
You can use any MCP client to invoke it, or send JSON-RPC 2.0 POST requests directly to `https://getvari.app/api/mcp/v1`. The server is also listed in the official MCP Registry.
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