ocaml-ec2 provides OCaml bindings to Amazon's Elastic Compute Cloud. This library is incomplete and a bit rough around the edges.
Some examples of usage can be found in the examples directory.
$ ./configure
# or, if you want support for registering your own AMIs:
# $ ./configure --enable-ami-tools
$ make
$ make install
You'll need to export your access and secret keys e.g.
$ export AWS_ACCESS_KEY=AKIAIOSFODNN7EXAMPLE
$ export AWS_SECRET_KEY=wJalrXUtnFEMI/K7MDENG+bPxRfiCYEXAMPLEKEY
$ export REGION=us-east-1 # optional
# ec2.ami specific:
$ export AWS_USER=01234567890 # optional; 12-digit account number without dashes