elpriser-client

Tiny, zero-dependency, typed JavaScript/TypeScript client for the elpriser.org API — Danish electricity prices for DK1 and DK2: current price, cheapest hours, and a 7-day forecast.

Works in the browser and Node.js ≥ 18 (uses the global fetch). No API key. Data from Energi Data Service (Energinet) / Nord Pool via elpriser.org.

Install

npm install elpriser-client

Usage

import { createElpriserClient } from 'elpriser-client';

const elpriser = createElpriserClient();

// What does electricity cost right now in West Denmark?
const now = await elpriser.now({ area: 'DK1', mode: 'inkl_alt' });
console.log(now.price, 'kr/kWh at', now.hour + ':00');

// When are the 5 cheapest hours today? (e.g. for EV charging)
const sched = await elpriser.schedule({ area: 'DK1', strategy: 'cheapest_n', hours: 5 });
const cheapest = sched.schedule.filter(s => s.on).map(s => s.hour);
console.log('Cheapest hours:', cheapest);

// 7-day forecast
const fc = await elpriser.forecast({ area: 'DK2' });

TypeScript types are bundled — now, prices, schedule, forecast, shellyTariff and supplierLookup are all fully typed.

API

Method	Endpoint	Returns
now(opts)	/api/now	Current price for this hour + schedule on/off
prices(opts)	/api/prices	24 hourly prices for a date
schedule(opts)	/api/schedule	Full 24h on/off schedule for a strategy
forecast(opts)	/api/forecast	7-day forecast
shellyTariff(opts)	/api/shelly/tariff	Tibber-compatible JSON (today + tomorrow)
supplierLookup({lat,lng})	/api/supplierlookup	Net company for a location

Options

• area: 'DK1' (Vestdanmark) or 'DK2' (Østdanmark). Default 'DK1'.
• mode: spot_ex · spot_inkl · inkl_alt (default) · inkl_alt_minus · net_inkl_alt · net_inkl_tarif
• strategy (schedule): cheapest_n · cheapest_pct · avoid_expensive_n · avoid_expensive_pct · avoid_peak · night_cheap · smart
• hours / pct / max_off / date / gln as applicable.

Node < 18

import fetch from 'node-fetch';
const elpriser = createElpriserClient({ fetch });

Custom base URL (self-hosting / testing)

const elpriser = createElpriserClient({ baseUrl: 'http://localhost:8788' });

Related

• MCP server — elpriser-mcp: use the same data from Claude Desktop and other LLM clients.
• API docs — https://elpriser.org/api · OpenAPI spec: https://elpriser.org/api/openapi.json

License

MIT © elpriser.org