MCP server

DERATE — truck fault codes Official

app.derate/derate

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkVerified publisher: derate.appAbout 2,426 tokens per request once connected15 tools

Website

https://derate.app/mcp

At a glance

Type: MCP server
Publisher: derate.app (verified by the MCP Registry)
Status: Working at last check
Tools: 15
Token cost: About 2,426 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

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

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"derate":{"type":"http","url":"https://derate.app/mcp"}}}

Antigravity

agy mcp add derate https://derate.app/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"derate","server_url":"https://derate.app/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"derate","server_url":"https://derate.app/mcp"}

Tools

buscar_codigo ~168 tokens
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.
es_seguro_manejar ~160 tokens
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.
explain_fault_code ~170 tokens
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.
get_data_notes ~117 tokens
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.
get_diagnosis ~122 tokens
Return the full DERATE demo diagnosis for a truck: verdict (STOP/CAUTION/CLEAR), derate countdown, every fault code and the work order summary.
get_download_links ~80 tokens
Return the official App Store and Google Play links for the DERATE native app (iOS and Android). DERATE runs only as a mobile app.
get_guide ~150 tokens
Full text (markdown) of one DERATE guide or news article by slug, with sources and the derate.app URL to cite. / Texto completo de una guía o noticia.
get_pricing ~103 tokens
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.
get_truck_fault_code ~254 tokens
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 pub
interpret_derate ~282 tokens
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
list_fault_codes ~111 tokens
List the fault codes (SPN/FMI) in the current DERATE diagnosis with severity, system, fault type and whether they are a root cause.
list_supported_engine_families ~97 tokens
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.
retiros_de_camion ~200 tokens
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.
search_fault_code_library ~246 tokens
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.
search_guides ~166 tokens
Search DERATE's truck-driver guides and trucking news (derate, DEF, emissions, recalls, enforcement, market). Returns title, quick answer and derate.app URL. / Busca en las guías y noticias de DERATE.

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