{ "openapi": "3.1.1", "info": { "title": "Finger-Joint Box Generator (laser \u0026 CNC) API", "version": "1.0.0", "summary": "Laser-cut and CNC finger-joint boxes with kerf compensation, lids and dividers.", "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://kerfwisefingerjointbox.usefulweb.app" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Laser-cut and CNC finger-joint boxes with kerf compensation, lids and dividers.", "description": "Generate a finger-joint (box-joint) box from inside or outside dimensions and the material thickness: closed lid, open tray or sliding lid, a grid of cross-halved dividers, kerf compensation for lasers and dog-bone reliefs for CNC routers. Every joint gets an odd number of equal fingers; the parts are nested onto your laser bed or stock sheet and exported as layered SVG, DXF R12, a 1:1 PDF with a scale bar and, for routers, G-code.\n\nMethodology:\n- Outside size = inside size + 2 × thickness in width and depth; in height + 2 × thickness with a lid, + 1 × thickness for an open tray, and + 2 × thickness + the lid slot for a sliding lid.\n- Each panel starts as its full outside rectangle. Where two panels overlap along a box edge, the T × T column is divided into an odd number n of equal fingers (n = the odd number nearest to length ÷ target width). Front and back own the end fingers against the sides, the walls own them against bottom and lid, and a corner cube shared by three panels goes to the highest-ranked one; each panel loses what its neighbours own. A point-sampling check in the test suite confirms that the panels fill the box shell exactly once.\n- Kerf compensation offsets outer outlines outwards and inner cut-outs inwards by half the kerf, so the parts come out at their nominal size. Dog-bones add a circle of the cutter radius through every inside corner so square fingers seat after routing.\n- Dividers are loose, cross-halved where they meet (slots of thickness + fit from the top of one and the bottom of the other). Nesting uses the Kerfwise MaxRects sheet nester; G-code uses the Kerfwise CNC engine (outside profiles with cutter compensation, inner cut-outs first, tabs).\n- SVG files use millimetres (width/height in mm, 1 user unit = 1 mm) with one group per layer: cut (red #e4002b), score (blue #0067c5), engrave (black) and labels (grey). DXF R12 uses the same layers, millimetres, y up.\n\nLaser cutters and CNC routers can start fires and release harmful fumes: never leave the machine unattended, use extraction, and never cut PVC, vinyl or other chlorine-containing plastics. Sizes, kerf and fit are starting points — check them with a test cut and follow your machine maker's safety rules.", "tags": [ "apps" ], "x-mcp-tool": "kerfwise_finger_joint_box", "x-owner-app": "kerfwise", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/KerfwiseFingerJointBoxInput" }, "examples": { "example1": { "summary": "Box with lid, 160 × 100 × 60 mm inside, 3 mm plywood", "value": { "width": 160, "depth": 100, "height": 60, "thickness": 3, "finger": 10, "kerf": 0.15, "lid": "closed" } }, "example2": { "summary": "Open tray with 3 × 2 dividers", "value": { "width": 200, "depth": 140, "height": 40, "thickness": 3, "lid": "open", "columns": 3, "rows": 2, "kerf": 0.12 } }, "example3": { "summary": "Sliding-lid pencil box nested on a 400 × 300 mm laser bed", "value": { "width": 190, "depth": 60, "height": 35, "thickness": 4, "finger": 8, "lid": "sliding", "sheetWidth": 400, "sheetHeight": 300, "kerf": 0.15 } }, "example4": { "summary": "CNC-routed 12 mm plywood crate with dog-bones and GRBL G-code", "value": { "width": 400, "depth": 300, "height": 250, "dims": "outer", "thickness": 12, "finger": 50, "kerf": 0, "lid": "open", "dogbone": 6, "sheetWidth": 1220, "sheetHeight": 1220, "spacing": 10, "cnc": "grbl", "toolDiameter": 6, "feed": 3000, "plunge": 600, "stepdown": 4 } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/KerfwiseFingerJointBoxResult" } } } }, "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" } } } } } }, "KerfwiseFingerJointBoxInput": { "type": "object", "additionalProperties": false, "properties": { "width": { "title": "Width (mm)", "type": "number", "minimum": 10, "maximum": 2000, "default": 160 }, "depth": { "title": "Depth (mm)", "type": "number", "minimum": 10, "maximum": 2000, "default": 100 }, "height": { "title": "Height (mm)", "type": "number", "minimum": 5, "maximum": 2000, "default": 60 }, "dims": { "title": "Dimensions are", "type": "string", "enum": [ "inner", "outer" ], "default": "inner" }, "thickness": { "title": "Material thickness (mm)", "description": "Measure your sheet with calipers: 3 mm plywood is often 2.8–3.2 mm.", "type": "number", "minimum": 0.5, "maximum": 40, "default": 3 }, "finger": { "title": "Finger width (target, mm)", "description": "Each joint is divided into an odd number of equal fingers close to this width.", "type": "number", "minimum": 1, "maximum": 500, "default": 10 }, "kerf": { "title": "Kerf compensation (mm, 0 = off)", "description": "The width of material the laser burns away. Find it with the kerf test coupon.", "type": "number", "minimum": 0, "maximum": 3, "default": 0.15 }, "fit": { "title": "Fit clearance for slots and sliding lid (mm)", "type": "number", "minimum": 0, "maximum": 3, "default": 0.2 }, "lid": { "title": "Lid", "type": "string", "enum": [ "closed", "open", "sliding" ], "default": "closed" }, "columns": { "title": "Compartments across the width", "type": "integer", "minimum": 1, "maximum": 12, "default": 1 }, "rows": { "title": "Compartments across the depth", "type": "integer", "minimum": 1, "maximum": 12, "default": 1 }, "dogbone": { "title": "Dog-bone reliefs for a router bit of diameter (mm, 0 = off)", "type": "number", "minimum": 0, "maximum": 25, "default": 0 }, "sheetWidth": { "title": "Sheet or laser bed width (mm, 0 = no sheet)", "description": "With a sheet size the parts are nested onto as many sheets as needed; 0 lays every part out in one drawing.", "type": "number", "minimum": 0, "maximum": 5000, "default": 0 }, "sheetHeight": { "title": "Sheet or laser bed height (mm, 0 = no sheet)", "type": "number", "minimum": 0, "maximum": 5000, "default": 0 }, "spacing": { "title": "Gap between parts (mm)", "description": "For CNC routing use at least the cutter diameter.", "type": "number", "minimum": 0, "maximum": 100, "default": 4 }, "labels": { "title": "Part names on a separate label layer", "type": "boolean", "default": true }, "paper": { "title": "PDF pages", "type": "string", "enum": [ "fit", "a3", "a4", "a5", "a6", "b5", "letter", "legal", "tabloid", "halfletter" ], "default": "fit" }, "cnc": { "title": "CNC G-code", "type": "string", "enum": [ "none", "grbl", "linuxcnc", "fanuc" ], "default": "none" }, "toolDiameter": { "title": "Cutter diameter (mm)", "type": "number", "minimum": 0.5, "maximum": 25, "default": 3.175 }, "feed": { "title": "Feed (mm/min)", "type": "number", "minimum": 50, "maximum": 30000, "default": 1200 }, "plunge": { "title": "Plunge (mm/min)", "type": "number", "minimum": 20, "maximum": 10000, "default": 300 }, "stepdown": { "title": "Depth per pass (mm)", "type": "number", "minimum": 0.1, "maximum": 30, "default": 1.5 } }, "required": [] }, "KerfwiseFingerJointBoxResult": { "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": [ "outside", "inside", "joints", "dividers", "gcode", "sheets", "parts", "pdfPages", "warnings", "files", "openInApp" ], "properties": { "outside": { "type": "object", "additionalProperties": false, "required": [ "width", "depth", "height" ], "properties": { "width": { "type": "number" }, "depth": { "type": "number" }, "height": { "type": "number" } } }, "inside": { "type": "object", "additionalProperties": false, "required": [ "width", "depth", "height" ], "properties": { "width": { "type": "number" }, "depth": { "type": "number" }, "height": { "type": "number" } } }, "joints": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "between", "length", "fingers", "fingerWidth" ], "properties": { "between": { "type": "string" }, "length": { "type": "number" }, "fingers": { "type": "integer" }, "fingerWidth": { "type": "number" } } } }, "dividers": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "columns", "rows", "height", "compartmentWidth", "compartmentDepth" ], "properties": { "columns": { "type": "integer" }, "rows": { "type": "integer" }, "height": { "type": "number" }, "compartmentWidth": { "type": "number" }, "compartmentDepth": { "type": "number" } } }, "gcode": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "dialect", "sheets", "lines", "timeSec" ], "properties": { "dialect": { "type": "string" }, "sheets": { "type": "integer" }, "lines": { "type": "integer" }, "timeSec": { "type": "number" } } }, "sheets": { "type": "integer" }, "parts": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "label", "name", "width", "height", "sheet" ], "properties": { "label": { "type": "string" }, "name": { "type": "string" }, "width": { "type": "number" }, "height": { "type": "number" }, "sheet": { "type": "integer" } } } }, "pdfPages": { "type": "integer" }, "warnings": { "type": "array", "items": { "type": "string" } }, "files": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "pdf" ], "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)." } } } } }, "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" } } } } } } } }