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evanTheTerribleWarrior/sendgrid-mail-send-c-example
A small example of sending email via Sendgrid using C
A minimal C example for sending email via SendGrid's HTTP API using libcurl. It's a single-file reference, not a library — useful if you're working in C and need to see the raw curl request shape without wading through SendGrid's official docs.
Makefile covers both GCC and MinGW so it works on Linux, Mac, and Windows without modification. Separates sendgrid.c/sendgrid.h from main.c, so the API logic isn't tangled with the CLI argument parsing. For what it is — a copy-paste starting point — it's clean and readable.
API key is hardcoded in main.c at line 27, which is a bad habit to teach in example code — at minimum this should read from an environment variable. No error handling on the curl response: if SendGrid returns a 4xx or the request fails, the program gives no useful feedback. Plain text body only — no HTML support, no attachments, no To CC/BCC. Zero test coverage and no CI, so there's no way to know if it still compiles against current libcurl.