Hey! I had the same issue with curl sending JSON a while back. Turns out, the API I was using expected the JSON to be minified (no spaces or line breaks). Try this:
```bash
curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' https://example.com/api
```
Also, check if the API requires any additional headers like `Authorization`. Sometimes that’s the missing piece.
```bash
curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' https://example.com/api
```
Also, check if the API requires any additional headers like `Authorization`. Sometimes that’s the missing piece.