{ "openapi": "3.1.1", "info": { "title": "3D Mesh Repair (STL, OBJ, PLY) API", "version": "1.0.0", "summary": "Weld, clean, reorient and close small holes in a mesh; get a report of every change.", "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://renderloommeshrepair.usefulweb.site" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Weld, clean, reorient and close small holes in a mesh; get a report of every change.", "description": "Repair an STL, OBJ or PLY mesh: weld duplicate vertices, remove zero-area and duplicate triangles, make the winding consistent with outward normals and fill small holes. Download the repaired file and a before/after report.\n\nMethodology:\n- Steps run in a fixed order: weld vertices within the tolerance, remove triangles with a repeated vertex or an area of at most 1e-12 × diagonal², remove triangles that use the same three vertices as an earlier triangle, then drop unused vertices.\n- Winding is propagated breadth-first across edges shared by exactly two triangles, so neighbours traverse their common edge in opposite directions. Open surfaces keep the majority of their original windings.\n- Each closed shell is turned outward when its divergence-theorem volume is negative. Shells inside other shells (cavities) are detected by ray-casting parity and point inward. Up to 64 closed shells are checked for nesting.\n- Boundary loops with at most the chosen number of edges are projected onto their best-fit (Newell) plane and filled by ear clipping. Loops that touch themselves or cross themselves in projection are left open. Orientation is checked again after filling.\n- The repaired mesh is written in the chosen format. Binary STL and PLY store 32-bit floating-point coordinates.\n\nHoles are closed with flat ear-clipped patches, which may not match the intended surface. Self-intersections, thin walls and overlapping parts are not repaired. Inspect the result before printing.", "tags": [ "apps" ], "x-mcp-tool": "renderloom_mesh_repair", "x-owner-app": "renderloom", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/RenderloomMeshRepairInput" }, "examples": { "example1": { "summary": "Close an open box, fix a flipped and a duplicated triangle (OBJ → binary STL)", "value": { "file": { "filename": "open-box.obj", "contentType": "model/obj", "contentBase64": "IyBSZW5kZXJsb29tIG1lc2ggKHVzZWZ1bHdlYi5zaXRlKQp2IDAgMCAwCnYgMjAgMCAwCnYgMjAgMjAgMAp2IDAgMjAgMAp2IDAgMCAyMAp2IDIwIDAgMjAKdiAyMCAyMCAyMAp2IDAgMjAgMjAKZiAxIDIgMwpmIDEgNCAzCmYgMSAyIDYKZiAxIDYgNQpmIDIgMyA3CmYgMiA3IDYKZiAzIDQgOApmIDMgOCA3CmYgNCAxIDUKZiA0IDUgOApmIDEgNiA1Cg==" }, "output": "stl-binary" } }, "example2": { "summary": "Turn an inside-out tetrahedron outward (ASCII PLY)", "value": { "meshText": "ply\nformat ascii 1.0\ncomment Renderloom mesh (usefulweb.site)\nelement vertex 4\nproperty float x\nproperty float y\nproperty float z\nelement face 4\nproperty list uchar int vertex_indices\nend_header\n0 0 0\n30 0 0\n0 30 0\n0 0 30\n3 0 1 2\n3 0 3 1\n3 0 2 3\n3 1 3 2\n" } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/RenderloomMeshRepairResult" } } } }, "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" } } } } } }, "RenderloomMeshRepairInput": { "type": "object", "additionalProperties": false, "properties": { "file": { "title": "Mesh file (STL, OBJ or PLY)", "description": "Binary or ASCII STL, OBJ, or ASCII/binary PLY up to 30 MB and 500000 triangles. Upload as {filename, contentType?, contentBase64}. Max 30720 KiB. Accepts .stl,.obj,.ply,model/stl,model/obj,model/x-ply,text/plain,application/octet-stream.", "type": "object", "additionalProperties": false, "required": [ "filename", "contentBase64" ], "properties": { "filename": { "type": "string" }, "contentType": { "type": "string" }, "contentBase64": { "type": "string" } } }, "meshText": { "title": "Or paste an ASCII STL, OBJ or PLY mesh", "type": "string", "maxLength": 2000000 }, "output": { "title": "Output format", "type": "string", "enum": [ "same", "stl-binary", "stl-ascii", "obj", "ply-binary", "ply-ascii" ], "default": "same" }, "weld": { "title": "Vertex welding", "type": "string", "enum": [ "auto", "exact", "loose" ], "default": "auto" }, "fillHoles": { "title": "Fill small holes", "type": "boolean", "default": true }, "maxHoleEdges": { "title": "Largest hole to fill (edges)", "type": "integer", "minimum": 3, "maximum": 200, "default": 64 } }, "required": [] }, "RenderloomMeshRepairResult": { "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": [ "report", "sections", "format", "file", "openInApp" ], "properties": { "report": { "type": "object" }, "sections": { "type": "array", "items": { "type": "object" } }, "format": { "type": "string" }, "file": { "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" } } }, "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" } } } } } } } }