Units · loads · bills · solar · hedges · mining

The energy desk for your AI agent.

Convert units, measure loads and price bills on your own tariff
Set the price cap, budget, carbon and approval rules your agent follows
Shift jobs to cheaper hours, size solar and storage, and check contract math

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ENERGY.mdv1.0

name:: energy
description:: Energy math on the person's own numbers. Convert units, measure a load and price it on their tariff, move flexible jobs to cheaper or cleaner hours, size solar and batteries, compare fixed and floating supply and settle hedges, work out generation cost, and run mining or other flexible loads only when they pay. Never invent a price, sign, trade or wire anything. Use when a task converts energy units, measures or prices a load, schedules a flexible job, sizes solar or batteries, compares supply contracts or hedges, works out generation cost, or runs mining or another flexible load.
license:: MIT
metadata:
version:: "1.0"
homepage:: https://energy.md
api:: https://energy.md/api/v1 (optional, no key, stores nothing)
mcp:: https://energy.md/mcp
terms:: https://energy.md/terms

Energy

Provided as is, at your own risk: figures are estimates from the numbers you use and may be wrong, and nothing here is trading, investment, legal, tax, engineering, electrical or safety advice, a quote, or an offer. Terms: https://energy.md/terms.

Work out energy, power, cost and emissions with the person's own numbers: their tariffs, prices, quotes, profiles and factors. Show your math once, in a short block. Say what is cheaper, cleaner or within limits on the numbers given; never say what the person should buy, sign or trade. Skip routine narration.

When this file has a "Your rules" section, those rules win over the defaults below. Each rule there ends with its setting key in brackets, like (hedge_ratio_max), and this file names rules by that key. Settings you drafted or changed yourself count only after the person says yes.

The tools are optional and do arithmetic only. Call them by GET or POST at https://energy.md/api/v1/<tool>, or as MCP tools at https://energy.md/mcp. In a GET, put arrays and objects in the query as URL-encoded JSON (curl -G --data-urlencode does this); in a POST, send the same fields as a JSON body. Every result has a summary, the formula used, assumptions and not_checked. Read not_checked before you report.

1. Units first

Power is a rate (W, kW, MW). Energy is an amount (Wh, kWh, MWh). Energy = power x hours. A 7 kW charger running 3 hours uses 21 kWh.

A bill charges kWh for energy and, on many business tariffs, $ per kW for the highest demand in the period. Keep the two apart.

MW vs MWh is the most common mix-up in plant, contract and battery figures. A "100 MW / 400 MWh" battery delivers 100 MW for about 4 hours. Ask which one a number is when the text is unclear.

Heat and fuel: 1 therm = 100,000 BTU. 1 MMBtu = 1,000,000 BTU = 10 therms. 1 kWh = 3,412 BTU. 1 MWh = 3.412 MMBtu.

Fuel to energy uses typical heat contents. Real fuel varies; say "typical" and use the person's own figure when they have one.

Optional tool: energy_units. It converts energy, power and fuel units, and flags a power-to-energy conversion that has no hours.

curl -s "https://energy.md/api/v1/energy_units?value=1500&from=kWh&to=MMBtu"

2. Measure the load

List every device: count, watts, hours per day, and duty (the share of those hours it actually draws). Use nameplate or measured watts from the person; say which.

Daily kWh = count x watts x hours per day x duty / 1,000. Multiply by the overhead factor for cooling or facility overhead (a PUE-style multiplier: 1.3 means 30% on top).

Peak kW is the running draw of everything that can be on at once (count x watts x duty x overhead / 1,000 for each device on in the same hour), not daily kWh spread over the day. Average kW = daily kWh / 24. Load factor = average kW / peak kW. A low load factor means demand charges weigh more.

Give on_hours (like "8-18") for every device that doesn't run all day: it makes time-of-use and demand bills exact. Without it, the tool spreads that device's energy over 24 hours for time-of-use pricing, counts its full draw as on at the peak, and says so in not_checked.

Servers, GPUs and other compute are loads like any other: watts x hours. Use the measured draw under the real workload when the person has it, not only the rated maximum.

Optional tool: load_energy. It returns kWh per day, month and year, peak and average kW, load factor, a bill for each tariff and emissions.

curl -sG "https://energy.md/api/v1/load_energy" \
  --data-urlencode 'devices=[{"label":"GPU server","count":4,"watts":1500,"hours_per_day":24,"duty":0.8},{"label":"office","count":1,"watts":2000,"hours_per_day":10,"on_hours":"8-18"}]' \
  --data-urlencode 'tariffs=[{"label":"flat","fixed_usd_per_month":20,"flat_usd_per_kwh":0.15},{"label":"time of use","fixed_usd_per_month":20,"tou":[{"label":"peak","hours":[16,17,18,19,20],"usd_per_kwh":0.3},{"label":"off-peak","hours":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,21,22,23],"usd_per_kwh":0.1}]}]' \
  --data-urlencode 'overhead_factor=1.2' --data-urlencode 'grid_kg_co2e_per_kwh=0.4'

3. Price it with the person's tariff

Use only prices from the person: their bill, tariff sheet, contract or a quote they received. Write down where each price came from.

Never invent a price, and never look one up on your own. If a price is missing, follow the missing_prices rule; by default, ask. The tools take no default prices and list what they couldn't price under not_checked.

Flat tariff: energy cost = kWh x $/kWh, plus the fixed monthly charge.

Time-of-use: split the kWh by hour band and price each band. The same kWh can cost very different amounts by hour.

Demand charge: highest kW in the period x $/kW. One short spike sets it for the whole month. Check the peak before adding a load.

Compare up to four tariffs at once in load_energy. The cheapest one on the person's load is arithmetic, not a switch: changing tariffs or suppliers is the person's call.

Taxes, riders and fees on a real bill vary. If the person gives them, add them; if not, say the total leaves them out.

4. Shift what can wait

A flexible job is one that only needs to finish by a deadline: charging, batch compute, pumping, heating water, washing. Get its energy (or power and run hours), the earliest start, the deadline, the most it may draw, and whether it may pause.

Get the person's 24 hourly prices for the day (and hourly carbon factors, if they have them). Never fill in an hour yourself.

Pick the cheapest hours inside the window. If the job can pause, those can be separate hours; if not, use the cheapest unbroken block.

Respect the price cap: never use an hour priced above it. If the job can't finish under the cap before the deadline, say so and ask. Never miss a deadline to save money unless the person says yes.

Compare against starting now, and report the saving in dollars and kg.

Follow the shift_flexible rule. If it says ask, show the window and wait. Even when it says always, you only plan the hours: set them only through scheduling controls or apps the person gave you for that, never switch equipment yourself, and tell the person what moved.

Optional tool: shift_load. It returns the cheapest window, the cleanest window, and their cost and emissions against starting now.

curl -sG "https://energy.md/api/v1/shift_load" \
  --data-urlencode 'energy_kwh=60' --data-urlencode 'max_power_kw=20' \
  --data-urlencode 'earliest_hour=6' --data-urlencode 'deadline_hour=18' --data-urlencode 'start_now_hour=6' \
  --data-urlencode 'interruptible=true' --data-urlencode 'max_price_usd_per_kwh=0.25' \
  --data-urlencode 'prices_usd_per_kwh=[0.12,0.11,0.1,0.1,0.1,0.11,0.14,0.18,0.2,0.16,0.12,0.09,0.08,0.08,0.09,0.12,0.22,0.3,0.34,0.32,0.26,0.2,0.16,0.13]'

5. Carbon

Emissions = kWh x the person's grid factor (kg CO2e per kWh). Use their factor; there is no built-in one. If they have none, report kWh and say emissions weren't counted.

When the person gives 24 hourly factors, use them: the cleanest hours are often not the cheapest. Show both windows.

Keep under the monthly carbon cap if one is set. Report kg per day and per month.

Say whether a factor is an average or a marginal figure if the person told you. Don't claim a job is "carbon free" or "green"; give the kg.

6. Solar and storage

Size PV from the person's daily load, the share of it to cover, and their site's peak sun hours. PV kW DC = daily kWh x share / (peak sun hours x (1 - system losses)). Losses default to 14%.

Size the battery for backup (backup load kW x hours) or for an evening shift (kWh moved from day to night). Usable kWh = nominal kWh x depth of discharge. Energy out = energy in x round-trip efficiency.

Inverter kW must cover the largest load it serves at once.

Money only on the person's numbers: install cost, battery cost, their tariff and export rate, the share they use on site, degradation, years and discount rate. Simple payback = net cost / first-year savings. NPV discounts each year's savings.

Incentives, credits and tax treatment depend on the person and where they are. Use only the share they or their tax professional give you.

A licensed installer, permits and interconnection approval are needed before anything is installed or connected. Sizing here is a first estimate, not a design.

Optional tool: solar_storage.

curl -s "https://energy.md/api/v1/solar_storage?daily_load_kwh=30&peak_sun_hours=4.5&backup_hours=8&backup_load_kw=1.5&install_usd_per_w=2.5&battery_usd_per_kwh=600&tariff_usd_per_kwh=0.2&export_usd_per_kwh=0.05&self_consumption_share=0.7&discount_rate=0.06"

7. Procurement and hedges

Get the volume (MWh, per year or per month), the fixed price the person was offered, and their own floating price scenarios (low, base, high). Never supply a scenario or a forward price yourself.

Fixed cost = volume x fixed price. Floating cost = volume x (floating price + any adder). Blend = hedge ratio x fixed + (1 - hedge ratio) x floating.

Break-even: the floating price at which fixed and floating cost the same. Below it, floating is cheaper; above it, fixed is. Show the range of outcomes across the scenarios.

Contract for difference or virtual PPA, from the buyer's side: settlement to the buyer = (market - strike) x volume. Positive: the seller pays the buyer. Negative: the buyer pays the seller. The seller's figure is the same with the opposite sign. The buyer still buys its power at market, so market cost minus settlement comes to about strike x volume for the hedged volume. hedge_math shows it from cfd_side (default buyer) and names the payer in cfd_payer: quote that field, and say whose side each sign is from.

Keep within the hedge_ratio_max rule if set.

This is educational arithmetic. Never sign, accept, negotiate, trade or commit to anything. At most, prepare the numbers for a person, and only if the contracts rule allows it.

Optional tool: hedge_math.

curl -sG "https://energy.md/api/v1/hedge_math" \
  --data-urlencode 'volume_mwh=1000' --data-urlencode 'fixed_usd_per_mwh=60' --data-urlencode 'hedge_ratio=0.7' \
  --data-urlencode 'scenarios_usd_per_mwh=[40,60,90]' --data-urlencode 'strike_usd_per_mwh=55'

8. Generation cost

Annual MWh = capacity MW x capacity factor x 8,760.

Capital recovery factor (CRF) = r(1+r)^n / ((1+r)^n - 1), with r the discount rate and n the life in years.

LCOE ($/MWh) = (capex x CRF + fixed O&M) / annual MWh + variable O&M + fuel. Fuel ($/MWh) = heat rate (MMBtu per MWh) x fuel price ($/MMBtu). A heat rate of 7,000 BTU/kWh is 7 MMBtu/MWh.

Spark spread (gas) or dark spread (coal) = power price - heat rate x fuel price. Positive means the fuel costs less than the power sells for, before other costs.

It works the same for solar, wind, hydro, nuclear, gas, coal or anything else; renewables just have no fuel line. All numbers come from the person.

LCOE leaves out taxes, financing structure, grid costs and revenue timing. Say so.

Optional tool: generation_cost.

curl -s "https://energy.md/api/v1/generation_cost?capacity_mw=100&capacity_factor=0.55&capex_usd_per_kw=1000&fixed_om_usd_per_kw_year=20&variable_om_usd_per_mwh=3&fuel_usd_per_mmbtu=3&heat_rate_btu_per_kwh=7000&discount_rate=0.07&life_years=30&power_usd_per_mwh=45"

9. Flexible loads and mining

Any machine that can stop is a flexible load: hash mining, batch compute, electrolysis, pumping. Run it only in hours where it earns more than its power costs.

Machine kW = hashrate (TH/s) x efficiency (J/TH) / 1,000, or the person's measured watts. Multiply by the overhead factor for cooling.

Daily power cost = kW x 24 x uptime x $/kWh. Daily revenue = hashrate x the person's revenue per TH per day. Margin = revenue - power cost.

Break-even power price = daily revenue / daily kWh. Curtail (switch off) in every hour priced above it.

Revenue comes only from the person. Never estimate it, and never look up a coin price, a network figure or a pool rate.

Optional tool: mining_power. With 24 hourly prices, it returns the curtailed margin and the hours to run. Switching machines stays with the person's own controls.

On the round illustrative numbers below (not market data): 26.25 kW, 630 kWh a day, a $49.60 daily margin at $0.08/kWh, break-even $0.1587/kWh, and on the hourly prices it runs 19 of 24 hours (not 16:00 to 21:00) for a $41.37 margin.

curl -sG "https://energy.md/api/v1/mining_power" \
  --data-urlencode 'machines=10' --data-urlencode 'hashrate_th_per_machine=100' --data-urlencode 'efficiency_j_per_th=25' \
  --data-urlencode 'overhead_factor=1.05' --data-urlencode 'power_usd_per_kwh=0.08' --data-urlencode 'revenue_usd_per_th_day=0.1' \
  --data-urlencode 'prices_usd_per_kwh=[0.06,0.05,0.05,0.04,0.04,0.05,0.07,0.09,0.1,0.09,0.08,0.07,0.07,0.08,0.1,0.12,0.16,0.2,0.24,0.22,0.16,0.12,0.09,0.07]'

10. Backup and availability

Runtime (hours) = usable kWh / critical load kW. Size the critical load from the devices that must stay on, not the whole site.

Battery usable kWh = nominal kWh x depth of discharge; allow for inverter losses.

Generator runtime = fuel on hand / burn rate at the expected load, from the person's or the maker's figures.

Check the result against the backup_min_hours rule, and flag any gap.

Generators, batteries, transfer switches and fuel storage need licensed installation, local codes and safe fuel storage. Never tell anyone how to wire, back-feed or connect a generator or battery.

11. Report

Five to eight lines: what was measured, the key numbers (kWh, peak kW, cost, kg CO2e), the option that is cheapest or cleanest on the numbers given, what is over a limit or needs a yes, what wasn't priced or checked, and the formula used.

Name the source of every price and factor ("your tariff", "your quote of ...", "typical heat content").

Call every figure an estimate. Never present it as a quote, a bill or a forecast.

If a rule needs a yes (a cap, the budget, approval_usd, a contract), stop and ask before anything else happens.

Never

Never invent, guess or look up a price, tariff, rate, emission factor, market figure or revenue. Ask, or list it as not priced.

Never buy, sell or trade energy, capacity, certificates, contracts or derivatives. Never place a bid, an offer or an order.

Never sign, accept, renew or negotiate a supply contract, PPA or hedge. Any purchase, contract, order or commitment is the person's to make, at any amount; you only prepare the numbers.

Never wire, physically switch or connect equipment, or give instructions for electrical work. That is licensed professionals' work. Change a schedule only through controls or apps the person gave you, as shift_flexible allows.

Never present an estimate as a quote, a bill, a forecast, a design or approval to connect.

Never tell the person what to buy, sign or trade. Say what is cheaper, cleaner or within limits on the numbers given.

Defaults

When a rule isn't set: ask for any missing price; ask before moving a job's timing; get the person's yes on any plan that spends or commits money, which they then carry out themselves; bill on 30 days; overhead factor 1 for most loads and 1.05 for mining; system losses 14%, depth of discharge 0.9, round-trip efficiency 0.9 and PV degradation 0.5% a year, each labeled as a default; no emissions without the person's factor; never a contract or a trade.

Works offline in any agent. Same file at /energy.md.

Customize

Your price cap, carbon and approval rules, in one file.

22 settings in 5 groups. Start from a preset, change anything, and your settings are written into ENERGY.md. Every setting is a number or a fixed choice, so a shared link can’t slip words into the file. The same settings work as URL parameters, MCP prompt arguments, the build_settings tool and /api/v1/build_settings.

Start from

Approval level, missing prices, the shift rule and the fixed rules: no trading, no contracts signed, licensed electrical work. Everything else follows the skill's defaults.

Prices you set

Your price cap, monthly budget and when to ask. Prices come from you, never from us.

2 of 5 set

Flexible loads never run above$/kWhEnergy budget per month$Get a yes on any plan that spends or commits over$Warn at this share of the budget%When a price is missing

6 of 22 set

ENERGY.md · your settings

Your rules

Set by the person you work for, and only that person can change them. Rules an agent drafted count only after that person says yes. Where a rule here and the rest of this file differ, the rule wins. If a rule blocks the task, stop and ask; don't work around it. Every price, tariff and factor in your work comes from the person or their own records.

Prices you set

Any plan that would have the person spend or commit more than $100 (a purchase, contract, order or commitment they make themselves), or go over the budget, needs their yes before anything else happens. You never place a purchase, order or contract yourself, at any amount; you only prepare the numbers. A tool result is arithmetic, not an approval. (approval_usd)

Never invent or look up a price, tariff or rate. If one is missing, ask the person for it. (missing_prices)

Loads and equipment

Electrical work, and installing or connecting generators, batteries, solar, chargers or other equipment, is for licensed professionals under local codes and permits. Never wire, physically switch or connect equipment yourself, and never give wiring or connection steps. (electrical_work)

Scheduling

Show the cheapest and cleanest window for a flexible job, and ask before moving it. (shift_flexible)

Contracts and approvals

Never sign, accept, renew or negotiate a supply contract, PPA, hedge or derivative, and never prepare one for signing. Point the person to their own advisers. (contracts)

Never buy, sell or trade energy, capacity, certificates, contracts or derivatives, and never place a bid, offer or order. This rule is fixed. (trading)

The full skill, with your settings at the top.

mkdir -p ~/.claude/skills/energy && curl -fsSL "https://energy.md/energy.md?approval_usd=100&missing_prices=ask&electrical_work=licensed_only&shift_flexible=ask&contracts=never&trading=never" -o ~/.claude/skills/energy/SKILL.md

Link

https://energy.md/energy.md?approval_usd=100&missing_prices=ask&electrical_work=licensed_only&shift_flexible=ask&contracts=never&trading=never

Copy as JSON

The same settings as one JSON object. It feeds the build_settings tool or POST /api/v1/build_settings.

6 of 22 settings set. Anything not set follows the skill’s own rules.

Tools

Energy math your agent can call.

Units, loads and bills, load shifting, solar and storage, fixed vs floating prices, generation cost and flexible loads like mining. Every tool works only on the numbers you send and shows its formula. Run them here, or call them over HTTP or MCP. They calculate and compare; they never buy, sign or trade anything.

Measure a load and price it on your tariffs

Adds up a list of devices (count, watts, hours a day, duty and optional on-hours) with a cooling or PUE-style overhead into kWh per day, month and year, peak and average kW and the load factor. Prices it on up to 4 of your tariffs (fixed monthly charge, flat or time-of-use energy rates, demand charge per kW) and names the cheapest, and gives emissions on your grid factor. Servers and GPUs work the same as any device. All prices and factors are yours; it looks up no tariff and fetches nothing.

Example values: Round illustrative numbers, not market data, a price or a quote; send your own.

devicesrequiredThe devices: [{label, count (default 1), watts (draw while on), hours_per_day (0-24), duty (0-1 share of on-time at full draw, default 1), on_hours (optional: when it runs, like "18-23" or a list of hours. Without it, a device under 24 h/day has its energy spread evenly over the day for time-of-use pricing, and its full draw is assumed to run at the same time as every other device for peak kW and demand charges; send on_hours to make time-of-use and demand bills exact)}].overhead_factorA multiplier on every device for cooling, power conversion or a PUE-style overhead. 1 means none. Default 1.daysDays in the billing month. Default 30.tariffsUp to 4 of your tariffs: [{label, fixed_usd_per_month, flat_usd_per_kwh, tou: [{label, hours: "16-21" or a list of hours, usd_per_kwh}], demand_usd_per_kw}]. Each needs a flat rate or time-of-use periods; a flat rate also covers hours no period lists. Charges you leave out are not counted. Optional.grid_kg_co2e_per_kwhYour grid emissions factor, kg CO2e per kWh. Optional.demand_limit_kwYour demand limit, kW. The peak is checked against it. Optional.budget_usd_per_monthYour monthly energy budget, $. The cheapest bill is checked against it. Optional.carbon_cap_kg_per_monthYour monthly carbon cap, kg CO2e. Needs grid_kg_co2e_per_kwh. Optional.

Run the tool to see a result. Estimates only; check them yourself.

POST /api/v1/load_energy

{
  "devices": [
    {
      "label": "GPU server",
      "count": 2,
      "watts": 1500,
      "hours_per_day": 24,
      "duty": 0.7
    },
    {
      "label": "EV charger",
      "count": 1,
      "watts": 7200,
      "hours_per_day": 4,
      "on_hours": "0-6"
    },
    {
      "label": "Heat pump",
      "count": 1,
      "watts": 3000,
      "hours_per_day": 8,
      "duty": 0.6,
      "on_hours": "6-22"
    }
  ],
  "overhead_factor": 1.1,
  "days": 30,
  "tariffs": [
    {
      "label": "Flat",
      "fixed_usd_per_month": 15,
      "flat_usd_per_kwh": 0.16
    },
    {
      "label": "Time of use",
      "fixed_usd_per_month": 15,
      "flat_usd_per_kwh": 0.14,
      "tou": [
        {
          "label": "Peak",
          "hours": "16-21",
          "usd_per_kwh": 0.32
        },
        {
          "label": "Night",
          "hours": "0-6",
          "usd_per_kwh": 0.08
        }
      ]
    }
  ],
  "grid_kg_co2e_per_kwh": 0.4
}

curl -s https://energy.md/api/v1/load_energy -H 'content-type: application/json' -d '{"devices":[{"label":"GPU server","count":2,"watts":1500,"hours_per_day":24,"duty":0.7},{"label":"EV charger","count":1,"watts":7200,"hours_per_day":4,"on_hours":"0-6"},{"label":"Heat pump","count":1,"watts":3000,"hours_per_day":8,"duty":0.6,"on_hours":"6-22"}],"overhead_factor":1.1,"days":30,"tariffs":[{"label":"Flat","fixed_usd_per_month":15,"flat_usd_per_kwh":0.16},{"label":"Time of use","fixed_usd_per_month":15,"flat_usd_per_kwh":0.14,"tou":[{"label":"Peak","hours":"16-21","usd_per_kwh":0.32},{"label":"Night","hours":"0-6","usd_per_kwh":0.08}]}],"grid_kg_co2e_per_kwh":0.4}'

Why

Agents mix up kW and kWh. Then they guess the price.

Ask an agent what a job will cost to run and it may confuse power with energy, skip the demand charge, or use a price it found somewhere. ENERGY.md gives it one method: units first, then the load, then your tariff, with your price cap, carbon factor and approval rules written in. The calculators do the arithmetic the same way every time and show the formula, so you can check it.

Your prices only: tariffs, quotes and price curves come from you. We show no prices and no market data.
Power is not energy: kW times hours is kWh. The tools flag a likely mix-up instead of guessing.
A person signs: your agent never signs supply contracts, hedges or trades. It prepares the numbers.
Same answer everywhere: the page, the API and the MCP tools run the same code.
Nothing stored: requests are answered and forgotten.

Use it in your stack

Paste it, install it, or call it.

The skill alone gives an agent the method. The MCP server and API add the tools and your settings. No key, no account.

Paste the prompt into a system prompt or project instructions. Or keep the file in the repo and point AGENTS.md at it.

terminal

curl -fsSL https://energy.md/energy.md -o ENERGY.mdecho "Whenever a task converts energy units, measures or prices a load, schedules a flexible job, sizes solar or batteries, compares supply contracts or hedges, works out generation cost, or runs mining or another flexible load, follow ENERGY.md." >> AGENTS.md

For agents that read a skills folder: install the skill so it loads when the topic comes up, and add the MCP server for the tools.

terminal

# The skillmkdir -p ~/.claude/skills/energycurl -fsSL https://energy.md/energy.md -o ~/.claude/skills/energy/SKILL.md# Tools: load_energy, shift_load, solar_storage, hedge_math, generation_cost, mining_power, energy_units, build_settingsclaude mcp add --transport http energy https://energy.md/mcp

For editors that read an mcp.json file: add the remote MCP server to the project, then paste the prompt into your rules.

mcp.json

// .cursor/mcp.json{ "mcpServers": { "energy": { "url": "https://energy.md/mcp" } } }// .vscode/mcp.json{ "servers": { "energy": { "type": "http", "url": "https://energy.md/mcp" } } }

Any client that speaks remote MCP over HTTP can add it as a custom connector. Read-only, so there is nothing to authorize.

connector

url: https://energy.md/mcptransport: streamable-http   # stateless, JSON responsestools: load_energy, shift_load, solar_storage, hedge_math, generation_cost, mining_power, energy_units, build_settingsprompts: energy   # the skill, with your settings

GET with query parameters or POST a JSON body. CORS open. An OpenAPI document is at /openapi.json.

terminal

# Every tool: GET or POST https://energy.md/api/v1/<tool>curl -s https://energy.md/api/v1 | jq '.tools[].name'curl -s "https://energy.md/api/v1/solar_storage?daily_load_kwh=30&peak_sun_hours=5&system_losses=0.14&offset_share=0.8&evening_shift_kwh=10&backup_hours=8&backup_load_kw=1.5&install_usd_per_w=2.5&battery_usd_per_kwh=700&incentive_share=0.3&tariff_usd_per_kwh=0.25&export_usd_per_kwh=0.05&self_consumption_share=0.85&discount_rate=0.05" | jq .summarycurl -s "https://energy.md/api/v1/settings" | jq '.presets[].id'

Quickest start:claude mcp add --transport http energy https://energy.md/mcp

Example code

Call it from your own code.

Working calls against the API. The full reference is at /api/v1 and /openapi.json.

Convert units, then measure a load and price it on two of your tariffs. No key; nothing is stored.

bill.sh

# Convert units, then measure a load and price it on two of your tariffs. No key; nothing is stored.API=https://energy.md/api/v1# Energy units: 1,500 kWh in MMBtu (and 5 kW for 8 hours in kWh)curl -s "$API/energy_units?value=1500&from=kWh&to=MMBtu" | jq .summarycurl -s "$API/energy_units?value=5&from=kW&to=kWh&hours=8" | jq .summary# A load: kWh per day, month and year, peak kW, load factor, a bill per tariff, emissions.# Prices and the grid factor are your own; these are round illustrative numbers, not market data.# on_hours (8:00 to 18:00 for the office) makes the time-of-use split and the demand charge exact.curl -s $API/load_energy -H 'content-type: application/json' -d '{  "devices": [    { "label": "GPU server", "count": 4, "watts": 1500, "hours_per_day": 24, "duty": 0.8 },    { "label": "office", "count": 1, "watts": 2000, "hours_per_day": 10, "on_hours": "8-18" }  ],  "overhead_factor": 1.2,  "days": 30,  "tariffs": [    { "label": "flat", "fixed_usd_per_month": 20, "flat_usd_per_kwh": 0.15 },    { "label": "time of use", "fixed_usd_per_month": 20, "demand_usd_per_kw": 8,      "tou": [        { "label": "peak", "hours": [16, 17, 18, 19, 20], "usd_per_kwh": 0.3 },        { "label": "off-peak", "hours": [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21, 22, 23], "usd_per_kwh": 0.1 }      ] }  ],  "grid_kg_co2e_per_kwh": 0.4}' | jq '{summary, not_checked}'

A flexible load that can stop: margin, break-even power price and the hours to run under your 24 prices.

mining.mts

// A flexible load that can stop: margin, break-even power price and the hours to run under your 24 prices.const API = "https://energy.md/api/v1";// Revenue per TH per day and prices are your own figures. These are round illustrative// numbers, not market data, a price or a quote, and not any particular machine.const prices = [0.06, 0.05, 0.05, 0.04, 0.04, 0.05, 0.07, 0.09, 0.1, 0.09, 0.08, 0.07, 0.07, 0.08, 0.1, 0.12, 0.16, 0.2, 0.24, 0.22, 0.16, 0.12, 0.09, 0.07];const res = await fetch(`${API}/mining_power`, {  method: "POST",  headers: { "content-type": "application/json" },  body: JSON.stringify({    machines: 10,    hashrate_th_per_machine: 100,    efficiency_j_per_th: 25,    overhead_factor: 1.05,    power_usd_per_kwh: 0.08,    revenue_usd_per_th_day: 0.1,    prices_usd_per_kwh: prices,  }),});const out = await res.json();if (!res.ok) throw new Error(`${out.error ?? res.status}`);console.log(out.summary);// On these numbers: 26.25 kW, 630 kWh/day, $49.60 daily margin, break-even $0.1587/kWh;// it runs 19 of 24 hours (hours 16-20 stop) for a $41.37 margin.// Curtail in every hour priced above the break-even. Switching machines is your own control system's job.

Before a flexible job runs: find its cheapest and cleanest hours over MCP, under your price cap.

shift.mts

// Before a flexible job runs: find its cheapest and cleanest hours over MCP, under your price cap.const MCP = "https://energy.md/mcp";async function call(name: string, args: Record<string, unknown>) {  const res = await fetch(MCP, {    method: "POST",    headers: { "content-type": "application/json", accept: "application/json" },    body: JSON.stringify({ jsonrpc: "2.0", id: 1, method: "tools/call", params: { name, arguments: args } }),  });  const { result } = await res.json();  if (result.isError) throw new Error(result.content[0].text);  return result.structuredContent;}// Your own 24 hourly prices ($/kWh) and carbon factors (kg CO2e/kWh) for today.// Round example numbers; use the ones from your tariff and your grid data.const prices = [0.12, 0.11, 0.1, 0.1, 0.1, 0.11, 0.14, 0.18, 0.2, 0.16, 0.12, 0.09, 0.08, 0.08, 0.09, 0.12, 0.22, 0.3, 0.34, 0.32, 0.26, 0.2, 0.16, 0.13];const carbon = [0.45, 0.44, 0.43, 0.43, 0.44, 0.45, 0.42, 0.38, 0.33, 0.28, 0.24, 0.21, 0.2, 0.2, 0.22, 0.27, 0.34, 0.41, 0.46, 0.47, 0.47, 0.46, 0.46, 0.45];const plan = await call("shift_load", {  energy_kwh: 60, // a batch job or a car to charge  max_power_kw: 20,  earliest_hour: 6,  deadline_hour: 18,  start_now_hour: 6,  interruptible: true,  max_price_usd_per_kwh: 0.25, // your cap: hours above it are never used  prices_usd_per_kwh: prices,  carbon_kg_per_kwh: carbon,});console.log(plan.summary);// A result is arithmetic, not an approval: if your rules say "ask first", show the plan and wait.

Size solar and a backup battery, with payback and NPV on your own costs. A first estimate, not a design.

solar.sh

# Size solar and a backup battery, with payback and NPV on your own costs. A first estimate, not a design.# Installs, permits and grid connection approval are for licensed professionals. Round example numbers.curl -s https://energy.md/api/v1/solar_storage -H 'content-type: application/json' -d '{  "daily_load_kwh": 30,  "peak_sun_hours": 4.5,  "offset_share": 0.8,  "backup_hours": 8,  "backup_load_kw": 1.5,  "install_usd_per_w": 2.5,  "battery_usd_per_kwh": 600,  "incentive_share": 0,  "tariff_usd_per_kwh": 0.2,  "export_usd_per_kwh": 0.05,  "self_consumption_share": 0.7,  "years": 25,  "discount_rate": 0.06}' | jq '{summary, not_checked, note}'

Fixed vs floating supply, hedge settlement and generation cost: educational arithmetic on your numbers.

supply.sh

# Fixed vs floating supply, hedge settlement and generation cost: educational arithmetic on your numbers.API=https://energy.md/api/v1# A fixed offer you received vs your own floating scenarios, 70% hedgedcurl -s $API/hedge_math -H 'content-type: application/json' -d '{  "volume_mwh": 1000,  "fixed_usd_per_mwh": 60,  "hedge_ratio": 0.7,  "scenarios_usd_per_mwh": [40, 60, 90],  "adder_usd_per_mwh": 2}' | jq '{summary, not_checked}'# Simple LCOE in parts, plus the spark spread at your power pricecurl -s "$API/generation_cost?capacity_mw=100&capacity_factor=0.55&capex_usd_per_kw=1000&fixed_om_usd_per_kw_year=20&variable_om_usd_per_mwh=3&fuel_usd_per_mmbtu=3&heat_rate_btu_per_kwh=7000&discount_rate=0.07&life_years=30&power_usd_per_mwh=45" \  | jq '{summary, formula}'

FAQ

Does it buy power, sign contracts or trade?

No. energy.md never buys, sells or trades energy, signs contracts, connects to equipment or gives a quote. It is not a utility, retailer, broker or exchange. It writes a skill file and runs read-only math on the numbers you send. The skill tells your agent to prepare numbers for a person, and never to sign, trade or commit.

Where do the prices come from?

From you. Every tariff, price curve, quote and revenue figure is an input with no default. The only built-in numbers are unit conversions and typical fuel heat contents, labeled as typical reference values.

Can it size solar, a battery or a generator?

It estimates sizes and simple payback on your numbers. Installs need a licensed professional, permits and local codes, and solar needs interconnection approval. Incentives and tax treatment depend on you; ask your professional.

Is the hedge math a trading signal?

No. It is arithmetic: what fixed, floating and blended costs come to under the scenarios you give, and how a contract for difference settles. It does not predict prices or pick a side.

Does it work for servers, GPUs and mining?

Yes. Servers, GPUs and miners are loads like any other: watts, hours and an overhead factor. The mining tool finds the break-even power price and the hours under it on your price curve.

Is this advice?

No. Nothing here is trading, investment, legal, tax, engineering, electrical or safety advice, a quote, or an offer to buy or sell energy, contracts or derivatives. ENERGY.md is a method for software agents plus calculators that work on the numbers you send. Results are estimates that may be wrong. Check them yourself, and ask a qualified person when it matters.

Does it name brands or show prices?

No. Settings and tools use generic terms, and energy.md shows no prices, rates or other outside data. Every number a tool uses comes from your request or from a formula the tool states.

Can an agent set up its own settings?

It can draft them: the same settings work as URL parameters, MCP prompt arguments and the build_settings tool. The skill and the tool both say that drafted settings count only after the person says yes. Nothing technical stops an agent from ignoring that, so read what it sends you.

Does a tool result mean something is approved?

No. Tools calculate, compare and check. They don’t approve, enforce or certify anything, and they can be wrong.

Can I change everything?

Yes. Start from a preset, change any setting above, and your choices are written into the file. Or edit the Markdown yourself. It’s MIT; keep your copy next to your code.

Do you track anything?

We count page views, copies, skill fetches and API and MCP calls to learn what is useful, without cookies or stored IP addresses. We never record your settings values or what you send to a tool. Details in the terms.