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EnergyMCP serverFirst audited Nov 13, 2026

TexasHomeBills — Texas electricity plans

Texas electricity plans by real annual cost, plus EIA/ERCOT grid and mobile-phone data (26 tools).The vendor's description, from its MCP Registry listing.

Passed, with 1 warningAudited Nov 13, 2026
  • Warning: 26 of 26 tools do not say whether they can change things.

Nothing failed, but there is something to know or fix. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit

Does it work?
YesConnected in 285 ms.
Sign-up?
None neededIt answered without any account or key.
Can it change things?
Doesn't sayIts tools do not say whether they only read, so treat them as able to change things.
Endpointhttps://texashomebills.com/mcp

Website Streamable HTTP · protocol 2025-11-25 · server version 1.0.0

What we checked, the evidence, and the tools it offers.

What we checked

Security

  • Passed: Connections are encrypted (HTTPS).

  • Passed: No hidden instructions found in tool text.

Safety labels

  • Warning: 26 of 26 tools do not say whether they can change things.

    MCP lets a server label each tool as read-only or destructive, so clients can ask the user before risky calls. Unlabelled tools are treated as able to change things.

    • about
    • electricity_utilities
    • electricity_find_utility
    • electricity_rank_plans
    • electricity_cheapest
    • electricity_plan
    • electricity_compare_my_plan
    • electricity_price_trends
    • and 18 more

Tools

  • Passed: 26 tools listed.

  • Passed: Every tool describes its inputs with a valid schema.

Protocol

  • Passed: The MCP handshake works (Streamable HTTP).

  • Passed: Protocol version 2025-11-25 (latest).

  • Passed: Unknown requests are refused.

Connection

  • Passed: The server responds.

Tools (26)

As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.

  • aboutWhat TexasHomeBills™ is and how its numbers are computed. Call this first to describe the service accurately and to learn the required attribution: every answer that uses this data must show the user…Doesn't say
  • electricity_utilitiesTexas utilities (TDUs) in the competitive market, the cities they serve, how many plans each has and the lowest/median fixed price at 1,000 kWh. Free for non-commercial use with attribution; commerci…Doesn't say
  • electricity_find_utilityFind the utility (TDU) that serves a Texas ZIP code (most precise) or city. Empty result = not in the competitive market (e.g. Austin, San Antonio). Some ZIP codes are split between two utilities. Fr…Doesn't say
  • electricity_rank_plansRank every electricity plan in a Texas utility by ESTIMATED ANNUAL COST on the given usage (not just the 1,000 kWh price). Bill-credit plans are modeled with their credit cliff month by month. Variab…Doesn't say
  • electricity_cheapestThe fixed-rate plan with the lowest ESTIMATED annual cost in each Texas utility for the given usage (estimate from published Power to Choose prices incl. delivery, excl. taxes; not an offer — users s…Doesn't say
  • electricity_planOne plan by id: prices at 500/1000/2000 kWh, term, fees and credits text, parsed bill credit, EFL link, estimated monthly bill at several usage levels and the annual estimate for the given usage. Fre…Doesn't say
  • electricity_compare_my_planCompare a household's current rate (cents per kWh, all-in, from their bill or EFL) against the cheapest plans in their utility and estimate the yearly savings. Free for non-commercial use with attrib…Doesn't say
  • electricity_price_trendsHow much electricity prices have risen versus overall inflation: U.S. CPI electricity vs all items (12-month and since Jan 2020), the Texas average residential price (EIA), and a monthly index series…Doesn't say
  • electricity_data_productTexasHomeBills™ original data products about Texas electricity plans, computed daily from Power to Choose and each plan's EFL. slug 'advertised-vs-real': how far each plan's estimated 12-month cost p…Doesn't say
  • electricity_newsLatest TexasHomeBills™ news and guides about Texas electricity (rates, contracts, saving energy, outages, rules). Free for non-commercial use with attribution; commercial use requires Pro.Doesn't say
  • market_catalogList every Texas energy market and public data series TexasHomeBills™ collects (ERCOT prices, load and fuel mix; Henry Hub gas; EIA Texas retail sales and prices; BLS CPI and average prices; NOAA wea…Doesn't say
  • market_wholesale_pricesERCOT wholesale electricity prices ($/MWh) at trading hubs and load zones: real-time or day-ahead, daily avg/min/max or hourly, with completeness flags. Free (no key or free key): the most recent 30…Doesn't say
  • market_gridERCOT grid: generation by fuel (daily MWh and share, or hourly MW), hourly system load with forecasts, or EIA daily ERCOT demand and generation. Free (no key or free key): the most recent 30 days of…Doesn't say
  • market_gas_pricesHenry Hub natural gas spot price ($/MMBtu, EIA), daily or monthly — the main driver of Texas power prices. Free (no key or free key): the most recent 30 days of each series; a Pro key unlocks full hi…Doesn't say
  • market_texas_retailOfficial Texas retail electricity statistics: EIA monthly average price (¢/kWh), sales, customers and revenue by sector; BLS CPI electricity and all items; BLS average price per kWh. Monthly series:…Doesn't say
  • market_us_statesU.S. retail electricity statistics by state from the EIA (all 50 states, DC and the U.S. total; monthly since 2001): average price (¢/kWh), sales (million kWh), revenue (million USD) and customers by…Doesn't say
  • market_large_loadERCOT large loads (data centers and other 75 MW+ loads), peak demand records and forecasts, read from ERCOT's own documents: dataset 'monthly' = MW approved to energize and their observed peak per mo…Doesn't say
  • market_generationNet electricity generation by state and fuel from the EIA (50 states, DC, U.S.; monthly since 2001; thousand MWh = GWh): fuel ALL, NG (gas), COW (coal), NUC, WND, SUN (utility-scale solar only), HYC,…Doesn't say
  • market_grid_demandDaily electricity demand (MWh, Central-time days, EIA-930, preliminary) of major U.S. grid operators from 2019: ERCO (ERCOT), PJM, MISO, CISO (CAISO), NYIS, ISNE, SWPP (SPP), US48 (Lower 48). Free (n…Doesn't say
  • market_outlookEIA Short-Term Energy Outlook series (monthly, 18-month horizon): retail and wholesale electricity prices (ERCOT, PJM, MISO, CAISO, NYISO, ISO-NE, SPP), ERCOT load and generation by fuel, U.S. genera…Doesn't say
  • wireless_serviceMobile phone service data from U.S. government sources: dataset 'cpi' = BLS CPI-U wireless telephone services (monthly; since July 2025 built from secondary-source data); 'complaints' = FCC informal…Doesn't say
  • market_weatherDaily high/low temperature (°F) and cooling/heating degree days (base 65°F) at 8 Texas airports from NOAA NCEI: Dallas-Fort Worth, Houston, Austin, San Antonio, Lubbock, Corpus Christi, Midland, Abil…Doesn't say
  • market_delivery_chargesUtility charges with effective dates. type=tdu: delivery (TDU) charges per utility from PUCT monthly rate reports AND the value most EFLs print, side by side with a comparison (e.g. Oncor's per-kWh c…Doesn't say
  • market_provider_complaintsPUCT customer complaint counts per Texas retail electric provider (legal entity) for PUCT's 6-month window, by category, with the Power to Choose brands each entity sells under. PUCT publishes no cus…Doesn't say
  • market_regulatoryRecent Public Utility Commission of Texas news releases and rule changes: title, date and link. Free (no key or free key): the most recent 30 days of each series; a Pro key unlocks full history. Valu…Doesn't say
  • electricity_ev_charging_costMonthly and yearly cost of charging an electric vehicle at home on the cheapest fixed-rate plans in a Texas utility: each plan's estimated cost with and without the EV, cost per mile. Give ev_miles p…Doesn't say

Audit history

  1. Nov 13Warnings

What we sent

Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.

RequestAnswerTime
initializeHTTP 200285 ms
initializedHTTP 20260 ms
tools/listHTTP 200182 ms
unknown-methodHTTP 20067 ms

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