APImyCAD.com

A simple HTTP API for CAD file conversion — built for developers and the manufacturing industry.

Send a file, get a converted file back. No SDK, no account juggling — one API key, one POST. This is the v1 preview; more (DWG → PDF, DWG → SVG, STEP → STL, and a geometry /analyze endpoint) are on the roadmap. We only ship conversions we have verified on real production drawings.

Authentication

Every request under /v1 needs an API key in the X-API-Key header (or Authorization: Bearer <key>). Free keys include a small daily quota; the response returns X-Quota-Limit and X-Quota-Remaining headers.

Endpoints

POST/v1/dwg-to-dxf .dwg → .dxf Convert an AutoCAD DWG drawing to DXF.

POST/v1/mesh obj·fbx·stl·ply·dae → glb·gltf·obj·stl·ply·dae Convert a 3D mesh between formats. Set the target with ?to= (default glb).

GET/v1/status Your plan, today's remaining quota, and which converters are live.

GET/health Liveness check (no key required).

Request

Upload the file as multipart/form-data in a field named file. On success the response body is the converted file (with a Content-Type and Content-Disposition for the download). Errors return JSON: { "error": { "code": "...", "message": "..." } }.

Examples

curl

# DWG → DXF
curl -X POST https://apimycad.com/v1/dwg-to-dxf \
  -H "X-API-Key: YOUR_KEY" \
  -F "file=@drawing.dwg" \
  -o drawing.dxf

# STL → GLB
curl -X POST "https://apimycad.com/v1/mesh?to=glb" \
  -H "X-API-Key: YOUR_KEY" \
  -F "file=@part.stl" \
  -o part.glb

C#

using var http = new HttpClient();
using var form = new MultipartFormDataContent();
await using var fs = File.OpenRead("drawing.dwg");
form.Add(new StreamContent(fs), "file", "drawing.dwg");

using var req = new HttpRequestMessage(HttpMethod.Post,
    "https://apimycad.com/v1/dwg-to-dxf") { Content = form };
req.Headers.Add("X-API-Key", "YOUR_KEY");

using var res = await http.SendAsync(req);
res.EnsureSuccessStatusCode();
await File.WriteAllBytesAsync("drawing.dxf",
    await res.Content.ReadAsByteArrayAsync());

Status & error codes

Code	Meaning
`200`	Success — body is the converted file.
`400`	No file, or an unknown mesh target.
`401`	Missing or invalid API key.
`413`	File exceeds the size limit (25 MB DWG, 50 MB mesh).
`415`	Unsupported input format for this endpoint.
`422`	The file couldn't be converted (corrupt / unsupported variant).
`429`	Daily quota reached — resets at 00:00 UTC.
`503`	That converter is temporarily unavailable on this host.