app.derate/derate

up checked 2026-11-11T06:40:20.273Z

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Publisher-provided title

DERATE — truck fault codes

Publisher-provided description

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

Summary by lookupd

Looks up diesel truck fault codes (J1939 SPN/FMI and OBD-II), gives safe-to-drive verdicts, and finds related guides and recall checks.

Install

Claude Code, remote (streamable-http)

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

Codex, remote (streamable-http)

codex mcp add derate --url https://derate.app/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

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

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (15 tools)

Publisher-provided text

• 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
• 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 segu
• 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
• 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. /
• 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 wha
• 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 mos
• 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
• 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
• 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
• 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 a

Details

• Version: 2.0.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 1030 ms
• First indexed: 2026-11-01T08:51:23.866Z
• Last seen in registry: 2026-11-01T08:51:23.866Z
• Website: https://derate.app

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