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DERATE — truck fault codes

R0· no sign-in

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

v2.0.0 · active · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality85good
Trust83of 100
Uptime, 30 days100%
Latency p501288 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "derate": {
      "type": "http",
      "url": "https://derate.app/mcp"
    }
  }
}
claude mcp add --transport http derate https://derate.app/mcp
[mcp_servers.derate]
url = "https://derate.app/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "derate": {
      "type": "remote",
      "url": "https://derate.app/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "derate": {
      "type": "http",
      "url": "https://derate.app/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=derate&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZGVyYXRlLmFwcC9tY3AifQ%3D%3D"
}
{
  "servers": {
    "derate": {
      "type": "http",
      "url": "https://derate.app/mcp"
    }
  }
}
{
  "mcpServers": {
    "derate": {
      "httpUrl": "https://derate.app/mcp"
    }
  }
}
extensions:
  "derate":
    enabled: true
    name: "derate"
    type: streamable_http
    uri: "https://derate.app/mcp"
    timeout: 300

Quality 85 / 100good

protocol75 · weight 25
  • warn
    protocol.modernnewest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
  • n/a
    protocol.statelessonly applies to 2026-07-28 servers
  • pass
    protocol.transportstreamable HTTP
  • n/a
    protocol.list_ttlonly applies to 2026-07-28 servers
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene86 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations13 of 13 tools declare readOnlyHint or destructiveHint
  • fail
    tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: buscar_codigo (destructiveHint); retiros_de_camion (destructiveHint); get_truck_fault_code (destructiveHint); …
  • pass
    tools.token_costabout 1,909 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changesno tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

13 tools, about 1,909 tokens to load them all · tool set 64616dd65523 · checked 2026-10-20 11:08 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 83 / 100

no-repository
provenance55
liveness100
freshness100
hygiene80

+dns-namespace +website +reachable +uptime-100% +updated-10d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://derate.app/mcp streamable-httpnoneyes100%1288 ms2025-06-182026-10-20

Tools (13)

buscar_codigoread-onlySearch 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_manejarread-onlySafe-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_coderead-onlyExplain 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_notesread-onlyDERATE 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_diagnosisread-onlyReturn the full DERATE demo diagnosis for a truck: verdict (STOP/CAUTION/CLEAR), derate countdown, every fault code and the work order summary.
get_download_linksread-onlyReturn the official App Store and Google Play links for the DERATE native app (iOS and Android). DERATE runs only as a mobile app.
get_pricingread-onlyList 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_coderead-onlyLook 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.
interpret_derateread-onlyExplain 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.
list_fault_codesread-onlyList 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_familiesread-onlyList 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_camionread-onlyHow 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_libraryread-onlyFull-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.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "app.derate/derate",
  "title": "DERATE — truck fault codes",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://derate.app/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "2.0.0",
  "websiteUrl": "https://derate.app",
  "description": "Heavy-duty truck SPN/FMI and OBD fault codes: meaning, safe-to-drive verdict, parts and recalls."
}