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DERATE — truck fault codes

app.derate/derate · v2.0.0

Measured by MCP Station

Description written by the publisher, not verified

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

Connect

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

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

Tools as reported by the server

• 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.
• 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.
• 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.
• 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.
• search_guides
  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.
• get_guide
  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_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 pub
• 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
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.

Tool changes

• 2026-10-21: buscar_codigo, es_seguro_manejar, retiros_de_camion, get_data_notes, search_guides, get_guide, get_truck_fault_code, interpret_derate, search_fault_code_library, list_supported_engine_families, get_pricing, get_download_links
• 2026-10-16: buscar_codigo, es_seguro_manejar, retiros_de_camion, get_data_notes, get_truck_fault_code, interpret_derate, search_fault_code_library, list_supported_engine_families, get_pricing, get_download_links, get_diagnosis, list_fault_codes

Website · JSON · Text for agents · Registry updated 2026-10-10