{"uid":"cap_aOG-CWZfCV4Plwq0Yl59-","slug":"energybilltoolkit-co-uk-5606a719","name":"M2M Trust SPC Audit – Statistical Process Control Analysis","description":"M2M Trust deterministic analysis tool: Lean Six Sigma SPC audit for a current value against control limits and recent history.","url":"https://energybilltoolkit.co.uk/m2m-trust/api/tools/spc-audit","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"buffer":{"type":"array","items":{"type":"number"},"description":"Recent historical values, oldest to newest."},"context":{"type":"string","description":"Short domain context for interpretation."},"lower_limit":{"type":"number","description":"Lower control/specification limit."},"upper_limit":{"type":"number","description":"Upper control/specification limit."},"current_value":{"type":"number","description":"Latest measured process value."}}},"responseSchema":null,"example":{"request":{"buffer":[4.5,4.6,4.4,4.7,4.5,4.6,4.8],"context":"boiler_pressure_bar","lower_limit":4,"upper_limit":5,"current_value":4.7},"response":{"status":"Optimal","verdict":"Value is in spec and recent history does not show obvious instability.","metadata":{"sigma":0.12454,"context":"boiler_pressure_bar","checks_run":["bounds","trend","shift","z_position"],"z_position":0.917663,"center_line":4.585714,"same_side_shift":false,"trend_direction":null,"insufficient_data":false},"confidence":0.67}},"exampleRequest":{"buffer":[4.5,4.6,4.4,4.7,4.5,4.6,4.8],"context":"boiler_pressure_bar","lower_limit":4,"upper_limit":5,"current_value":4.7},"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8X8oHT9wWEmXyvAxAjZZm","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Runs a deterministic Lean Six Sigma SPC audit comparing a current value against control limits and recent historical data to flag process violations.","exampleAgentPrompt":"Run an SPC audit on my latest boiler pressure reading of 4.7 bar — my recent history is [4.5, 4.6, 4.4, 4.7, 4.5, 4.6, 4.8] and my upper control limit is 5.0, lower control limit is 4.0. Tell me if it's in control and flag any rule violations.","exampleUseCases":null,"resultDescription":"Returns a deterministic SPC audit report indicating whether the current value is within control limits, which (if any) SPC rules are breached, process stability status, and signals derived from the recent measurement history.","failureModes":["Missing required current value returns 400 validation error","Insufficient history data points may result in unreliable SPC signals","Control limits not provided or malformed returns error","Non-numeric values in history array cause parse failure","Values outside plausible range may return warnings"],"whenToPreferThis":"Use this endpoint when you need a fast, deterministic, reproducible SPC audit for a single current value against its control limits and recent history — especially in M2M or automated quality monitoring pipelines where LLM-based analysis would be non-deterministic. Prefer over generic statistics endpoints when you specifically need Lean Six Sigma SPC rule checking (e.g. Western Electric rules, Nelson rules).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:34:11.154Z","isFirstParty":false}