{ "openapi": "3.1.1", "info": { "title": "Graph, Dot, Isometric, Hex and Music Paper API", "version": "1.0.0", "summary": "Printable grid, dot, isometric, hexagon, music staff and lined paper at exact sizes.", "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://printshopgraphpaper.usefulweb.app" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Printable grid, dot, isometric, hexagon, music staff and lined paper at exact sizes.", "description": "Make printable paper with a square grid (with major lines), dot grid, isometric triangles, hexagons, music staves or writing lines. Spacing is exact in millimetres, the grid is centred on the page and a 10 cm scale bar lets you check the printer scale.\n\nMethodology:\n- Square and dot grids use whole cells centred in the area inside the margin, so leftover space is split evenly. Major lines count from the first line.\n- Isometric paper draws three families of lines (horizontal and ±60°) that form equilateral triangles of the given side; hexagons are regular with the given side, in offset rows (pointy top) or columns (flat top).\n- Music staves have five lines with the given spacing and a gap of 1.75 staff heights between staves. Lined paper starts one line spacing below the top margin.\n\nPrint at 100 % (actual size) and check the 10 cm scale bar: “fit to page” changes every spacing.", "tags": [ "apps" ], "x-mcp-tool": "printshop_graph_paper", "x-owner-app": "printshop", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/PrintshopGraphPaperInput" }, "examples": { "example1": { "summary": "5 mm grid with centimetre lines", "value": { "kind": "grid", "spacing": 5, "majorEvery": 2 } }, "example2": { "summary": "Dot grid journal page", "value": { "kind": "dots", "spacing": 5, "majorEvery": 0, "color": "#8f9aa6" } }, "example3": { "summary": "Isometric drawing paper", "value": { "kind": "isometric", "spacing": 8, "majorEvery": 0 } }, "example4": { "summary": "Music staff paper", "value": { "kind": "music", "spacing": 2, "header": true } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/PrintshopGraphPaperResult" } } } }, "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" } } } } } }, "PrintshopGraphPaperInput": { "type": "object", "additionalProperties": false, "properties": { "kind": { "title": "Paper type", "type": "string", "enum": [ "grid", "dots", "isometric", "hex", "music", "lined" ], "default": "grid" }, "spacing": { "title": "Spacing (mm, 0 = usual for the paper type)", "description": "Grid/dot pitch, triangle or hexagon side, line distance, or the distance between two staff lines. 0 uses 5 mm for grid and dots, 8 mm for isometric, hexagons and lined paper, 2 mm for music staves.", "type": "number", "minimum": 0, "maximum": 50, "default": 0 }, "majorEvery": { "title": "Major line every … cells", "type": "integer", "minimum": 0, "maximum": 20, "default": 5 }, "lineWidth": { "title": "Line width (mm)", "type": "number", "minimum": 0.05, "maximum": 2, "default": 0.15 }, "color": { "title": "Line colour", "type": "string", "maxLength": 7, "default": "#9db7d5" }, "majorColor": { "title": "Major line colour", "type": "string", "maxLength": 7, "default": "#5f86b5" }, "margin": { "title": "Margin (mm)", "type": "number", "minimum": 0, "maximum": 50, "default": 10 }, "marginLine": { "title": "Margin line for lined paper (mm from the left)", "type": "number", "minimum": 0, "maximum": 200, "default": 0 }, "header": { "title": "Name and date line at the top", "type": "boolean", "default": false }, "hexOrientation": { "title": "Hexagon orientation", "type": "string", "enum": [ "pointy", "flat" ], "default": "pointy" }, "pages": { "title": "Pages", "type": "integer", "minimum": 1, "maximum": 50, "default": 1 }, "paper": { "title": "Paper size", "type": "string", "enum": [ "a3", "a4", "a5", "a6", "b5", "letter", "legal", "tabloid", "halfletter" ], "default": "a4" }, "orientation": { "title": "Orientation", "type": "string", "enum": [ "portrait", "landscape" ], "default": "portrait" } }, "required": [] }, "PrintshopGraphPaperResult": { "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": [ "kind", "spacingMm", "cellsPerPage", "pages", "pageWidthMm", "pageHeightMm", "warnings", "files", "openInApp" ], "properties": { "kind": { "type": "string" }, "spacingMm": { "type": "number" }, "cellsPerPage": { "type": "integer" }, "pages": { "type": "integer" }, "pageWidthMm": { "type": "number" }, "pageHeightMm": { "type": "number" }, "warnings": { "type": "array", "items": { "type": "string" } }, "files": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "pdf", "svg", "png" ], "properties": { "pdf": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "svg": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "png": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } } } }, "openInApp": { "type": [ "string", "null" ] } } }, "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" } } } } } } } }