Fuelcenter

codymcc4/fuelcenter

This server exposes FuelCenter's marathon planning tools through MCP, giving you programmatic access to their fueling, pacing, and race strategy calculators. You can query carb intake recommendations, generate mile-by-mile fueling schedules, adjust pace for heat and humidity, compare energy gels by nutrition and cost, and get course-specific strategies for major marathons like Boston, NYC, and Berlin. It handles the math around carb loading rates, hydration timing, and elevation-adjusted splits. Useful if you're building training apps, chatbots for runners, or anything that needs to calculate race day nutrition and pacing without reinventing the formulas yourself.

tools: 7
transport: HTTP
last updated: Apr 17, 2026

View on GitHub

Install

From registry metadata

$ npx add-mcp https://fuelcenter.co/api/mcp --name fuelcenter

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http fuelcenter https://fuelcenter.co/api/mcp

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 7 tools

Verified live against the running server on Nov 6, 2026.

fueling-planBuild a minute-by-minute race or long-run fueling plan. Returns target carbs/hour, gel count, gel timing schedule, and total carbs. This is the core FuelCenter tool.9 params

Build a minute-by-minute race or long-run fueling plan. Returns target carbs/hour, gel count, gel timing schedule, and total carbs. This is the core FuelCenter tool.

Parameters* required

buffernumber

Minutes of buffer at start and end where no gel is taken. Default 5.

drinkCarbsTotalnumber

Total grams of carbs from drink mix across the run. Default 0.

drinkMixboolean

Whether the runner uses a carbohydrate drink mix. Default false.

experiencestring

Runner experience with fueling. Default "standard".one of standard · experienced

gelKey*string

Gel product key. See /api/tools/gel-comparison for full catalog.one of sis_beta_fuel · maurten_100 · maurten_160 · precision_pf30 · gu_energy · gu_roctane

hours*number

Race or run duration, hours portion.

intensity*string

Effort level.one of easy · easy_moderate · moderate_hard · race_day

minutes*number

Race or run duration, minutes portion.

targetCPHnumber

Target carbs per hour. If omitted, default is derived from guideline.

race-time-predictorPredict your finish time at common distances (5K through 100 miles) from a recent race result using the Riegel formula.3 params

Predict your finish time at common distances (5K through 100 miles) from a recent race result using the Riegel formula.

Parameters* required

exponentnumber

Riegel exponent. Default 1.06.

knownDistanceMiles*number

Distance of your recent race, in miles.

knownTimeSeconds*number

Finish time for that race, in total seconds.

pace-calculatorGiven any two of distance, total time, or pace-per-mile, calculate the third. Returns pace per mile, per km, splits, and speed.4 params

Given any two of distance, total time, or pace-per-mile, calculate the third. Returns pace per mile, per km, splits, and speed.

Parameters* required

distanceMilesnumber

Required for mode "pace" or "time".

mode*string

Which field to solve for.one of pace · time · distance

paceSecondsPerMilenumber

Required for mode "time" or "distance".

totalSecondsnumber

Required for mode "pace" or "distance".

heat-adjustmentEstimate how temperature and humidity will slow your race pace and change your fluid needs. Returns adjusted pace, slowdown percent, dew point, risk level, and fueling note.4 params

Estimate how temperature and humidity will slow your race pace and change your fluid needs. Returns adjusted pace, slowdown percent, dew point, risk level, and fueling note.

Parameters* required

distanceMiles*number

Race distance in miles.

humidity*number

Relative humidity as a percentage, 0-100.

paceSecondsPerMile*number

Your goal pace in seconds per mile (cool-weather pace).

tempF*number

Air temperature at race time in degrees Fahrenheit.

hydrationEstimate fluid and sodium needs for a race or long run based on body weight, duration, intensity, temperature, and humidity.5 params

Estimate fluid and sodium needs for a race or long run based on body weight, duration, intensity, temperature, and humidity.

Parameters* required

bodyWeightLbs*number

Body weight in pounds.

durationMinutes*number

Run or race duration in minutes.

humidity*number

Relative humidity, 0-100.

intensity*string

Effort level.one of easy · moderate · hard · race

tempF*number

Temperature in Fahrenheit.

carb-loadingCalculate pre-race carb loading targets by race type, body weight, finish time, and experience level. Returns daily carb target, protocol length, total carbs, and pre-race meal size.6 params

Calculate pre-race carb loading targets by race type, body weight, finish time, and experience level. Returns daily carb target, protocol length, total carbs, and pre-race meal size.

Parameters* required

bodyWeightLbs*number

Body weight in pounds.

experience*string

Runner experience level.one of first_timer · intermediate · experienced · elite

finishTimeHours*number

Expected finish time, hours portion.

finishTimeMinutes*number

Expected finish time, minutes portion.

hasGIIssuesboolean

Whether the runner has a sensitive stomach. Default false.

raceType*string

Race distance category.one of half · marathon · ultra

gel-comparisonReturn the FuelCenter gel catalog (SiS Beta Fuel, Maurten, Precision, GU, Tailwind, Spring, Carbs Fuel, neversecond, Huma) with carbs, price, caffeine, weight, and carbs-per-dollar. Optionally sort.2 params

Return the FuelCenter gel catalog (SiS Beta Fuel, Maurten, Precision, GU, Tailwind, Spring, Carbs Fuel, neversecond, Huma) with carbs, price, caffeine, weight, and carbs-per-dollar. Optionally sort.

Parameters* required

sortDirectionstring

Sort direction. Default "desc".one of asc · desc

sortKeystring

Column to sort by. Default "carbsPerDollar".one of carbsPerDollar · carbs · priceUsd · weightG · caffeineMg

Readme

Details

Repository: github.com/codymcc4/fuelcenter
Website: fuelcenter.co
Transport: HTTP
Registry: MCP registry, active
Tools verified: Nov 6, 2026