The PQSDK is a versatile software development kit designed to simplify the prototyping and experimentation of both post-quantum and conventional cryptographic primitives. It integrates PQShield's PQCryptoLib library with OpenSSL and mbedTLS, two prominent cryptographic libraries. PQSDK is tailored to facilitate secure application prototyping and enable post-quantum enhancements in secure communication protocols, like TLS 1.3.