DERATE — truck fault codes MCP Server

by derate Your server? Claim it

answering

DERATE — truck fault codes is answering right now. Last checked 13 min ago. It exposes 13 tools.

Heavy-duty truck SPN/FMI and OBD fault codes: meaning, safe-to-drive verdict, parts and recalls.

Uptime history 7 days of history

7 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

406 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check DERATE — truck fault codes every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add derate --transport http https://derate.app/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "derate": {
      "url": "https://derate.app/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.derate]
url = "https://derate.app/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "derate": {
      "url": "https://derate.app/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "derate": {
      "url": "https://derate.app/mcp"
    }
  }
}

Available tools 13

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

fault

list_fault_codes

List the fault codes (SPN/FMI) in the current DERATE diagnosis with severity, system, fault type and whether they are a root cause.

search_fault_code_library

Full-text search over DERATE's public diesel truck fault-code library by code, system, dashboard light or symptom words. Returns a list of matching entries with code, title, severity, system and the canonical public URL.

buscar

buscar_codigo

Search DERATE's 56-code heavy-truck library by SPN/FMI, P-code or free text. Returns severity, derates yes/no, meaning, part and estimated part-price range, and the page URL. / Busca en la biblioteca de códigos de DERATE.

data

get_data_notes

DERATE dataset notes: code count, sources, known gaps, license (CC BY 4.0), how to cite and download URLs. / Notas de calidad, licencia y cómo citar.

diagnosis

get_diagnosis

Return the full DERATE demo diagnosis for a truck: verdict (STOP/CAUTION/CLEAR), derate countdown, every fault code and the work order summary.

download

get_download_links

Return the official App Store and Google Play links for the DERATE native app (iOS and Android). DERATE runs only as a mobile app.

explain

explain_fault_code

Explain a truck fault code or symptom in DERATE terms: plain-language meaning, severity, probable causes, recommended tests with expected values, repair steps and cost estimate.

interpret

interpret_derate

Explain a diesel truck engine derate or power-loss symptom described in plain language (for example 'DEF light on and truck limited to 55 mph'). Returns the most likely cause, how urgent it is, the immediate action to take, and matching public fault-code pages. This is the free public interpretation; the full guided diagnosis with tests and a work order runs in the DERATE app.

pricing

get_pricing

List DERATE's plans and prices in USD. The app is a free download; plans are purchased inside the iOS/Android app (App Store / Google Play). Monthly Driver and Shop plans include a 7-day free trial for new subscribers.

retiros

retiros_de_camion

How to check heavy-truck safety recalls (NHTSA-based), with per-make source links for Freightliner, Volvo, Kenworth, Peterbilt, International, Mack and Western Star. / Cómo revisar retiros de seguridad.

seguro

es_seguro_manejar

Safe-to-drive verdict (stop / service_soon / info) for a truck fault code, from DERATE's library only. Unknown codes return 'unknown'. / Veredicto de si es seguro seguir manejando.

supported

list_supported_engine_families

List the diesel truck engine families and code protocols DERATE interprets (J1939 SPN/FMI and OBD-II), so an agent knows whether a given truck is covered before looking up a code.

truck

get_truck_fault_code

Look up a diesel truck fault code (J1939 SPN/FMI such as 'SPN 3251 FMI 0', or an OBD-II code such as 'P2002') in DERATE's public fault-code library. Returns what the code means, its severity, whether it is safe to keep driving, probable causes, the recommended tests, and the canonical URL of the public page for that code. Works without any account.

Endpoints

URL	Transport	State	Latency	Checked
https://derate.app/mcp	streamable-http	answering	432 ms	13 min ago

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DERATE — truck fault codes — questions

Answers built from our own checks of this server.

What can DERATE — truck fault codes do?

It exposes 13 tools, read directly from the server on our last check. Among them: buscar_codigo, es_seguro_manejar, explain_fault_code, get_data_notes, get_diagnosis, get_download_links and 7 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is DERATE — truck fault codes working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 406 ms. The bar chart above shows every period we have measured.

How do I connect DERATE — truck fault codes?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does DERATE — truck fault codes need an API key?

No. DERATE — truck fault codes completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 13 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is DERATE — truck fault codes?

It answers our handshake in 406 ms on average, which is faster than 30% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.