{ "openapi": "3.1.1", "info": { "title": "Focus Room World Clock API", "version": "1.0.0", "summary": "Local times, UTC offsets and daylight saving in several cities, plus the best meeting hours.", "description": "Every endpoint performs the same calculation as the human page and returns inputs, result, units, assumptions, sources, warnings and computedAt. MCP endpoint: /mcp." }, "servers": [ { "url": "https://focusroomworldclock.usefulweb.app" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Local times, UTC offsets and daylight saving in several cities, plus the best meeting hours.", "description": "Shows one moment on the clocks of up to twelve time zones — local date and time, weekday, UTC offset, daylight saving and the day difference — as a table and as analogue clock faces, then plans a meeting: for each hour of the day it lists how many places are inside their working hours, so you can see at a glance when everyone is at work. The Focus Room app shows the same clocks as a live world-clock strip.\n\nMethodology:\n- Local times, offsets and weekdays come from the IANA time-zone database through the platform’s Intl implementation. Daylight saving time = the zone’s offset at that moment is above the smaller of its January and July offsets that year.\n- Day difference = local date of the zone minus the local date of the first zone.\n- Meeting planner: the day of the moment in the first zone is split into its 24 local hours; an hour counts for a place when that whole hour lies inside the working hours on a Monday to Friday there. Best hours are those with the highest count.\n- Clock faces are drawn with rotated lines only (hour hand 30° per hour plus 0.5° per minute, minute hand 6° per minute), so every device draws the same picture.", "tags": [ "apps" ], "x-mcp-tool": "focusroom_world_clock", "x-owner-app": "focusroom", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/FocusroomWorldClockInput" }, "examples": { "example1": { "summary": "Berlin, New York and Tokyo on a Monday morning in December", "value": { "zones": [ "Europe/Berlin", "America/New_York", "Asia/Tokyo" ], "at": "2026-12-21T09:00", "atZone": "Europe/Berlin" } }, "example2": { "summary": "A distributed team: San Francisco, London, Kolkata and Sydney", "value": { "zones": [ "America/Los_Angeles", "Europe/London", "Asia/Kolkata", "Australia/Sydney" ], "at": "2027-04-06T16:00", "atZone": "UTC", "workStart": 8, "workEnd": 18 } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/FocusroomWorldClockResult" } } } }, "400": { "description": "Malformed JSON body.", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "422": { "description": "Invalid input (see errors[]).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "429": { "description": "Rate limit exceeded (see Retry-After).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } } } } }, "/api/v1/tool": { "get": { "operationId": "getToolDefinition", "summary": "Inputs, output schema and examples for this tool", "responses": { "200": { "description": "Tool definition.", "content": { "application/json": { "schema": { "type": "object" } } } } } } } }, "components": { "schemas": { "Problem": { "type": "object", "description": "RFC 9457 problem details. 422 responses include per-field `errors`.", "required": [ "type", "title", "status", "detail" ], "properties": { "type": { "type": "string" }, "title": { "type": "string" }, "status": { "type": "integer" }, "detail": { "type": "string" }, "code": { "type": "string" }, "errors": { "type": "array", "items": { "type": "object", "required": [ "field", "message" ], "properties": { "field": { "type": "string" }, "message": { "type": "string" } } } } } }, "FocusroomWorldClockInput": { "type": "object", "additionalProperties": false, "properties": { "zones": { "title": "Time zones", "description": "One IANA name per line; the first one is the reference for day differences and the meeting planner.", "type": "array", "items": { "type": "string" }, "maxItems": 12, "default": [ "Europe/Berlin", "America/New_York", "Asia/Tokyo" ] }, "at": { "title": "Moment (optional)", "description": "Empty = now (rounded down to the minute). Local date-time YYYY-MM-DDTHH:mm", "type": "string" }, "atZone": { "title": "Time zone of that moment", "description": "IANA time-zone name such as Europe/Berlin, America/New_York, Asia/Kolkata or UTC.", "type": "string", "maxLength": 64, "default": "UTC" }, "workStart": { "title": "Working hours start", "type": "integer", "minimum": 0, "maximum": 23, "default": 9, "x-unit": "h" }, "workEnd": { "title": "Working hours end", "type": "integer", "minimum": 1, "maximum": 24, "default": 17, "x-unit": "h" } }, "required": [] }, "FocusroomWorldClockResult": { "type": "object", "additionalProperties": false, "required": [ "schemaVersion", "tool", "computedAt", "inputs", "summary", "result", "units", "assumptions", "sources", "warnings", "presentation", "links" ], "properties": { "schemaVersion": { "type": "string", "const": "1.0" }, "tool": { "type": "object", "additionalProperties": false, "required": [ "id", "name", "version" ], "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "version": { "type": "string" } } }, "computedAt": { "type": "string", "format": "date-time" }, "inputs": { "type": "object", "description": "Normalised inputs actually used, including applied defaults." }, "summary": { "type": "string" }, "result": { "type": "object", "additionalProperties": false, "required": [ "utc", "rows", "meetingDate", "bestHours", "bestCount", "hours" ], "properties": { "utc": { "type": "string" }, "rows": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "zone", "city", "local", "weekday", "offset", "dst", "dayShift", "workHours" ], "properties": { "zone": { "type": "string" }, "city": { "type": "string" }, "local": { "type": "string" }, "weekday": { "type": "string" }, "offset": { "type": "string" }, "dst": { "type": "boolean" }, "dayShift": { "type": "integer" }, "workHours": { "type": "boolean" } } } }, "meetingDate": { "type": "string", "description": "Local date (first zone) of the planned day." }, "bestHours": { "type": "array", "items": { "type": "string" }, "description": "Start times (first zone) of the hours with the most places inside working hours." }, "bestCount": { "type": "integer" }, "hours": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "utc", "local", "inside" ], "properties": { "utc": { "type": "string" }, "local": { "type": "array", "items": { "type": "string" } }, "inside": { "type": "integer" } } } } } }, "units": { "type": "object", "additionalProperties": { "type": "string" } }, "assumptions": { "type": "array", "items": { "type": "string" } }, "sources": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "title" ], "properties": { "title": { "type": "string" }, "url": { "type": "string" }, "publisher": { "type": "string" }, "retrievedAt": { "type": "string" }, "note": { "type": "string" } } } }, "warnings": { "type": "array", "items": { "type": "string" } }, "presentation": { "type": "array", "items": { "type": "object" }, "description": "Display blocks used by the human page (same data)." }, "links": { "type": "object", "additionalProperties": false, "required": [ "human", "api", "openapi", "methodology" ], "properties": { "human": { "type": "string", "format": "uri" }, "api": { "type": "string", "format": "uri" }, "openapi": { "type": "string", "format": "uri" }, "methodology": { "type": "string", "format": "uri" } } } } } } } }