How do I properly use curl http post for sending data? or What's the correct syntax for a curl http p

If your curl http post isn’t working, double-check the endpoint and headers. Some APIs need `Accept: application/json` too. For debugging, save the output to a file:

```bash
curl -v -X POST https://example.com/api -d '{"key":"value"}' > response.txt 2>&1
```

This’ll help you spot errors like 401s or 400s. Also, check if the API docs mention CORS or CSRF protections.