# Switchje open data

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

- name: nl.switchje/open-data
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 79/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/nl.switchje%2Fopen-data
- tools: https://api.protogrid.dev/v1/servers/nl.switchje%2Fopen-data/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "open-data": {
      "type": "http",
      "url": "https://switchje.nl/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-4d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 79/100 (new)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 71 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: methodology (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); offer_lifecycle (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); cheapest_today (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
- pass `tools.token_cost`: about 485 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool history recorded for 3 of the 7 days needed

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 5, about 485 tokens to load them all
- tool set hash: 65e084574678be19e89b21285790c224
- badge: [![protogrid quality](https://protogrid.dev/badge/nl.switchje/open-data.svg)](https://protogrid.dev/servers/nl.switchje/open-data)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://switchje.nl/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (5)

- `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.
- `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'.
- `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.
- `methodology`: How Switchje ranks offers, the standard profiles spelled out, the licence and how to attribute.
- `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').