# io.github.codymcc4/fuelcenter (remote · fuelcenter.co)

Marathon fueling, pace, hydration, heat, carb-loading, and gel-comparison calculators.

- Trust score: 74/100 (medium)
- Change this week: +5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `fuelcenter.co`: 74/100 (this document), [markdown](https://verifymcp.io/servers/codymcc4-fuelcenter/api-mcp.md), [page](https://verifymcp.io/servers/codymcc4-fuelcenter/api-mcp)

## Channel facts

- Endpoint: `https://fuelcenter.co/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 75/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 876 tokens (~125/item across 7 items; 7 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http codymcc4-fuelcenter https://fuelcenter.co/api/mcp
```

### Codex

```toml
[mcp_servers.codymcc4-fuelcenter]
url = "https://fuelcenter.co/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "codymcc4-fuelcenter": {
      "type": "remote",
      "url": "https://fuelcenter.co/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add codymcc4-fuelcenter --url https://fuelcenter.co/api/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  codymcc4-fuelcenter:
    url: "https://fuelcenter.co/api/mcp"
```

### Other

```json
{
  "mcpServers": {
    "codymcc4-fuelcenter": {
      "type": "http",
      "url": "https://fuelcenter.co/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 73, +4)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 69, −2)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-29 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-28 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 69, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 69)

First indexed and scored.

## MCP tools (7)

### `fueling-plan` (~208 tokens)

Fueling Plan

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.

Input parameters:

- `buffer` (number): Minutes of buffer at start and end where no gel is taken. Default 5.
- `drinkCarbsTotal` (number): Total grams of carbs from drink mix across the run. Default 0.
- `drinkMix` (boolean): Whether the runner uses a carbohydrate drink mix. Default false.
- `experience` (string): Runner experience with fueling. Default "standard".
- `gelKey` (string, required): Gel product key. See /api/tools/gel-comparison for full catalog.
- `hours` (number, required): Race or run duration, hours portion.
- `intensity` (string, required): Effort level.
- `minutes` (number, required): Race or run duration, minutes portion.
- `targetCPH` (number): Target carbs per hour. If omitted, default is derived from guideline.

### `race-time-predictor` (~88 tokens)

Race Time Predictor

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

Input parameters:

- `exponent` (number): Riegel exponent. Default 1.06.
- `knownDistanceMiles` (number, required): Distance of your recent race, in miles.
- `knownTimeSeconds` (number, required): Finish time for that race, in total seconds.

### `pace-calculator` (~106 tokens)

Pace Calculator

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

Input parameters:

- `distanceMiles` (number): Required for mode "pace" or "time".
- `mode` (string, required): Which field to solve for.
- `paceSecondsPerMile` (number): Required for mode "time" or "distance".
- `totalSeconds` (number): Required for mode "pace" or "distance".

### `heat-adjustment` (~109 tokens)

Heat Adjustment

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.

Input parameters:

- `distanceMiles` (number, required): Race distance in miles.
- `humidity` (number, required): Relative humidity as a percentage, 0-100.
- `paceSecondsPerMile` (number, required): Your goal pace in seconds per mile (cool-weather pace).
- `tempF` (number, required): Air temperature at race time in degrees Fahrenheit.

### `hydration` (~95 tokens)

Hydration Calculator

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

Input parameters:

- `bodyWeightLbs` (number, required): Body weight in pounds.
- `durationMinutes` (number, required): Run or race duration in minutes.
- `humidity` (number, required): Relative humidity, 0-100.
- `intensity` (string, required): Effort level.
- `tempF` (number, required): Temperature in Fahrenheit.

### `carb-loading` (~133 tokens)

Carb Loading Calculator

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.

Input parameters:

- `bodyWeightLbs` (number, required): Body weight in pounds.
- `experience` (string, required): Runner experience level.
- `finishTimeHours` (number, required): Expected finish time, hours portion.
- `finishTimeMinutes` (number, required): Expected finish time, minutes portion.
- `hasGIIssues` (boolean): Whether the runner has a sensitive stomach. Default false.
- `raceType` (string, required): Race distance category.

### `gel-comparison` (~94 tokens)

Gel Comparison

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.

Input parameters:

- `sortDirection` (string): Sort direction. Default "desc".
- `sortKey` (string): Column to sort by. Default "carbsPerDollar".

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/codymcc4-fuelcenter/api-mcp#diagnostics

## Score history

- 2026-08-03: 74
- 2026-08-02: 73
- 2026-08-01: 73
- 2026-07-31: 73
- 2026-07-30: 69
- 2026-07-29: 71
- 2026-07-28: 70
- 2026-07-27: 69
- 2026-07-26: 69

## Links

- Remote endpoint: https://fuelcenter.co/api/mcp
- Repository: https://github.com/codymcc4/fuelcenter
- Website: https://fuelcenter.co/
- Changelog RSS feed: https://verifymcp.io/servers/codymcc4-fuelcenter/api-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/codymcc4-fuelcenter/api-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/codymcc4-fuelcenter/api-mcp