API & MCP

Everything a person can do on Quiet Week Finder, a program or AI agent can do with the same inputs and get the identical result.

HTTP API

POST https://hearthquietweeks.usefulweb.app/api/v1/calculate – run Quiet Week Finder
GET https://hearthquietweeks.usefulweb.app/api/v1/tool – inputs, output schema, examples
OpenAPI 3.1: /openapi.json · /openapi.yaml
Errors: application/problem+json; 422 includes per-field errors.

Quiet Week Finder

Name the countries most visitors to a place come from, with weights, and get a crowd index for every week: how much of each country is on school or public holiday. The lowest weeks are the quiet ones for a trip, a booking or an errand.

Inputs of Quiet Week Finder
Field	Type	Default	Description
`visitors` (required)	text	"DE:3, NL:2, BE:1"	Visitor countries with weights. Two-letter codes, optional weights, for example “DE:3, NL:2, BE:1”. Include the destination’s own country for local visitors.
`from` (required)	date	"2027-01-04"	Period from
`to` (required)	date	"2027-12-27"	Period to

Example request

Dutch coast: Germans, Dutch and Belgians, 2027

curl -X POST https://hearthquietweeks.usefulweb.app/api/v1/calculate -H 'content-type: application/json' -d '{"visitors":"DE:3, NL:2, BE:1","from":"2027-01-04","to":"2027-12-27"}'

Every result contains

inputs (normalised, defaults applied), summary, result (validated against the published schema), units, assumptions, sources, warnings, computedAt and links.

MCP (Model Context Protocol)

Streamable HTTP endpoint: https://hearthquietweeks.usefulweb.app/mcp – protocol revisions 2026-07-28 (stateless) and 2025-11-25 / 2025-06-18 / 2025-03-26 (initialize handshake).
Tools: hearth_quiet_weeks
Local stdio connector: node src/mcp-stdio.ts --tool=hearth-quiet-weeks

{
  "mcpServers": {
    "hearth-quiet-weeks": { "type": "http", "url": "https://hearthquietweeks.usefulweb.app/mcp" }
  }
}