Compute exact min/km, min/mile, and 400m track splits for 5K, 10K, Half Marathon, and Marathon.
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Calculate exact min/km pace, min/mile pace, speed (km/h), and 400m track lap time for 5K, 10K, Half Marathon, Marathon, or custom distance.
Race distance in kilometers (e.g. 5, 10, 21.0975, 42.195)
Target finish time in total minutes (e.g. 20 for a 20-minute 5K)
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claude mcp add --transport http endurance-pace-lab https://arenacalc.com/mcp
Calculate exact min/km pace, min/mile pace, speed (km/h), and 400m track lap time for 5K, 10K, Half Marathon, Marathon, or custom distance.
| Argument | Type | Description |
|---|---|---|
| distance_km* | number | Race distance in kilometers (e.g. 5, 10, 21.0975, 42.195) |
| target_minutes* |
| number |
| Target finish time in total minutes (e.g. 20 for a 20-minute 5K) |
{
"type": "object",
"required": [
"distance_km",
"target_minutes"
],
"properties": {
"distance_km": {
"type": "number",
"description": "Race distance in kilometers (e.g. 5, 10, 21.0975, 42.195)"
},
"target_minutes": {
"type": "number",
"description": "Target finish time in total minutes (e.g. 20 for a 20-minute 5K)"
}
}
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 11, 2026.
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Fix: Add annotations to each tool, e.g. { readOnlyHint: true } for tools that only read.