Switchje open data

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Dutch energy market, open data computed nightly: cheapest contracts, market levels, offer lifecycle

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "Switchje open data": {
      "url": "https://switchje.nl/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (5)

• cheapest_today

  The five cheapest energy offers in the Netherlands for a standard household profile on the most recent day with data, with a coarse cost split (supply, taxes and levies, network, feed-in, one-off) and the time each price was fetched. profile: one of methodology()'s standard profiles, e.g. 'median', 'solar', 'heatpump', 'ev'.

  Parameters:

  • profile — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• cheapest_history

  The five cheapest offers per day for a standard profile over a date range (ISO dates, inclusive; both optional). A missing day had no valid run.

  Parameters:

  • profile — string
  • to_date
  • from_date

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• market_summary

  Market aggregates for one day (ISO date; default the most recent) and profile: offers priced per contract type, median yearly cost, spread between cheapest and priciest, offers with cashback, offers added and withdrawn that day.

  Parameters:

  • date
  • profile — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• offer_lifecycle

  When each offer was first seen on sale and when it was withdrawn (empty = still on sale), across every supplier we track; optionally filtered by supplier code (e.g. 'eneco').

  Parameters:

  • supplier

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• methodology

  How Switchje ranks offers, the standard profiles spelled out, the licence and how to attribute.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

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