| bytes | Package bytes implements functions for the manipulation of byte slices. |
| crypto/x509 | Package x509 implements a subset of the X.509 standard. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| encoding/pem | Package pem implements the PEM data encoding, which originated in Privacy Enhanced Mail. |
| github.com/google/martian | Package martian provides an HTTP/1.1 proxy with an API for configurable request and response modifiers. |
| github.com/google/martian/log | Package log provides a universal logger for martian packages. |
| github.com/google/martian/parse | Package parse constructs martian modifiers from JSON messages. |
| github.com/google/martian/verify | Package verify provides support for using martian modifiers for request and response verifications. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| net/http | Package http provides HTTP client and server implementations. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |