The only dependency-aware GraphQL API testing tool!

GraphQLer is a cutting-edge tool designed to dynamically test GraphQL APIs with a focus on awareness. It offers a range of sophisticated features that streamline the testing process and ensure robust analysis of GraphQL APIs such as being able to automatically read a schema and run tests against an API using the schema. Furthermore, GraphQLer is aware of dependencies between objects queries and mutations which is then used to perform security tests against APIs.

• Dependency awareness: Run queries and mutations based on their dependencies!
• Dynamic testing: Keep track of resources created during testing
• Error correction: Try and fix requests so that the GraphQL API accepts them
• Statistics collection: Shows your results in a nice file
• Ease of use: All you need is the endpoint and the authentication token if needed

Quick installation can be done either with pip:

pip install GraphQLer
python -m graphqler --help

or docker:

docker pull omar2535/graphqler:latest
docker run --rm omar2535/graphqler --help

For a more in-depth guide, check out the installation guide.

❯ python -m graphqler --help
usage: __main__.py [-h] --url URL --path PATH [--config CONFIG] --mode {compile,fuzz,idor,run,single} [--auth AUTH] [--proxy PROXY] [--node NODE] [--version]

options:
  -h, --help            show this help message and exit
  --url URL             remote host URL
  --path PATH           directory location for files to be saved-to/used-from
  --config CONFIG       configuration file for the program
  --mode {compile,fuzz,idor,run,single}
                        mode to run the program in
  --auth AUTH           authentication token Example: 'Bearer arandompat-abcdefgh'
  --proxy PROXY         proxy to use for requests (ie. http://127.0.0.1:8080)
  --node NODE           node to run (only used in single mode)
  --version             display version

Below will be the steps on how you can use this program to test your GraphQL API. The usage is split into 2 phases, compilation and fuzzing.

• Compilation mode:This mode is responsible for running an introspection query against the given API and generating the dependency graphh
• Fuzzing mode: This mode is responsible for traversing the dependency graph and sending test requests to the API

A third mode is also included for ease of use, called run mode. this mode compiles both the compilation and fuzzing mode into one single command.

python -m graphqler --mode compile --url <URL> --path <SAVE_PATH>

After compiling, you can view the compiled results in the <SAVE_PATH>/compiled. Additionally, a graph will have been generated called dependency_graph.png for inspection. Any UNKNOWNS in the compiled .yaml files can be manually marked; however, if not marked the fuzzer will still run them but just without using a dependency chain.

python -m graphqler --mode fuzz --url <URL> --path <SAVE_PATH>

While fuzzing, statistics related to the GraphQL API and any ongoing request counts are logged in the console. Any request return codes are written to <SAVE_PATH>/stats.txt. All logs during fuzzing are kept in <SAVE_PATH>/logs/fuzzer.log. The log file will tell you exactly which requests are sent to which endpoints, and what the response was. This can be used for further result analysis. A copy of the objects bucket can be found in objects_bucket.pkl as well.

python -m graphqler --mode idor --url <URL> --path <SAVE_PATH>

The insecure direct object reference (IDOR) mode can be run after compile mode and fuzz mode is complete. It requires the objects_bucket.pkl file to already exist as it uses the objects bucket from a previous run to see if information found/created from a previous run is also reference-able in a new run.

Runs both the Compile mode and Fuzz mode

python -m graphqler --mode run --url <URL> --path <SAVE_PATH>

Runs a single node (make sure it exists in the list of queries or mutations)

python -m graphqler --url <URL> --path <SAVE_PATH> --config <CUSTOM_CONFIG>> --proxy <CUSTOM_PROXY> --mode single --node <NODE_NAME>

There are also varaibles that can be modified with the --config flag as a TOML file (see /examples/config.toml for an example). These correspond to specific features implemented in GraphQLer, and can be tuned to your liking.