APICheck - The DevSecOps toolset for HTTP APIs

APICheck is an environment for integrating existing HTTP APIs tools and create execution chains easily. Designed with integration third party tools in mind.

APICheck is comprised of a set of tools that can be connected to each other to achieve different functionalities, depending on how they are connected. It allows you to create execution chains

Why another REST APIs tool?

APICheck aims to be a universal toolset for testing REST APIs, allowing you to mix and match the tools it provides, while enabling interoperability with third party tools. This way we hope that it will be useful to a wide spectrum of users that need to deal with REST APIs.

Who is APICheck for?

APICheck focuses not only in the security testing and hacking use cases, the goal of the project is to become a complete toolset for DevSecOps cycles. The tools are aimed to different user profiles:

  • Developers
  • System Administrators
  • Security Engineers & Penetration Testers

Pipelines & data flow

In *NIX, you can chain multiple commands together in a pipeline. Consider this one:

Unix pipeline

In a similar way, you can build APICheck pipelines by chaining the different tools together.

To allow interoperability among commands and tools, all of them share a common JSON data format. In other words, APICheck commands output JSON documents, and accept them as input, too. This allows you to build pipelines (as we showed in the previous section).

APICheck data format


If your are a tool developer you can integrate with APICheck tools in no more than 10 minutes. Please check the Integrating new tools guide


This project is distributed under Apache 2 license.



APICheck relies heavily on Docker, so you must have the Docker daemon installed in order to use it.

Although you can run APICheck tools by directly pulling and running each Docker image, We recommend that you use the APICheck Package Manager. This document will explain how to use it to run APICheck.


Package Manager needs Python >= 3.5 installed. To install it just type in your console:

pip install apicheck-package-manager

Add APICheck config to PATH

You need to include APICheck binary path to your global $PATH var. So, add this line to your shell profile:

export PATH="$HOME/.apicheck_manager/bin:$PATH"

The First Run

Once installed, you can run the Package Manager by using the command acp.

$ acp
[!] Invalid action name

usage: acp [-h] [-w] {list,info,install,version} ...

APICheck Manager

positional arguments:
                        available actions
    list                search in A
    info                show expanded tool info
    install             install an APICheck tool
    version             displays version

optional arguments:
  -h, --help            show this help message and exit
  -w, --disable-warning
                        disable check of RC Shell File

Package Manager allows you to list the available tools, install them and so on.

Listing available tools

The list command shows what are the available tools in the APICheck repository:

$ acp list
| Name           | Version                         |
| apicheck-proxy | 1.0.2                           |
| jwt-checker    | 1.0.0                           |
| send-to-proxy  | 1.0.2                           |
| acurl          | 1.0.0                           |
| replay         | 1.0.0                           |
| sensitive-data | 1.0.1                           |
| openapiv2-lint | 1.0.0                           |
| openapiv3-lint | 1.0.0                           |

To get more info about any tool, use the info command:

$ acp info sensitive-data

| Tool name 'sensitive-data'                                                |
| name                       | sensitive-data                               |
| display-name               | Sensitive data detector                      |
| version                    | 1.0.1                                        |
| description                | Find sensitive data in HTTP Request /        |
|                            | / Headers                                    |
| home                       | https://github.com/BBVA/apicheck             |
| author                     | BBVA Labs Security                           |
| type                       | apicheck                                     |

Installing a new tool

APICheck uses Docker under the hoods. So when to install a new tool, Docker image fetch will be displayed.

$ acp install sensitive-data
[*] Creating path for storing apicheck tools at : /Users/Dani/.apicheck_manager/bin
[*] Fetching Docker image for tool 'sensitive-data'

    1.0.1: Pulling from bbvalabs/sensitive-data
    cbdbe7a5bc2a: Already exists
    26ebcd19a4e3: Already exists
    a29d43ca1bb4: Pulling fs layer
    979dbbcf63e0: Pulling fs layer
    30beed04940c: Pulling fs layer
    7ac3561504a8: Pulling fs layer
    3619e044d33d: Pulling fs layer
    d3c293fd2442: Pulling fs layer
    d0feb92e4bbc: Pulling fs layer
    7ac3561504a8: Waiting
    3619e044d33d: Waiting
    d3c293fd2442: Waiting
    d0feb92e4bbc: Waiting
    979dbbcf63e0: Verifying Checksum
    979dbbcf63e0: Download complete
    30beed04940c: Verifying Checksum
    30beed04940c: Download complete
    7ac3561504a8: Verifying Checksum
    7ac3561504a8: Download complete
    a29d43ca1bb4: Verifying Checksum
    a29d43ca1bb4: Download complete
    d0feb92e4bbc: Verifying Checksum
    d0feb92e4bbc: Download complete
    d3c293fd2442: Verifying Checksum
    d3c293fd2442: Download complete
    3619e044d33d: Verifying Checksum
    3619e044d33d: Download complete
    a29d43ca1bb4: Pull complete
    979dbbcf63e0: Pull complete
    30beed04940c: Pull complete
    7ac3561504a8: Pull complete
    3619e044d33d: Pull complete
    d3c293fd2442: Pull complete
    d0feb92e4bbc: Pull complete
    Digest: sha256:be66ed12618ce5786e7a8d234ddbf0116e466180e02ef5dd75b09c830b6687dc
    Status: Downloaded newer image for bbvalabs/sensitive-data:1.0.1

[*] Making launch scripts
[*] Updating configuration file

Running tools

Once you have installed a tool and added APICheck binary path you will have available a tool command with the name of the tool:

$ sensitive-data -h
usage: sensitive-data [-h] [-q] [-F IGNORE_FILE] [-i IGNORE_RULE]
                      [-r RULES_FILE] [--server SERVER] [-C] [-D]

Analyze a HTTP Request / Response searching for sensitive data

optional arguments:
  -h, --help            show this help message and exit
  -q, --quiet           quiet mode
  -F IGNORE_FILE, --ignore-file IGNORE_FILE
                        file with ignores rules
  -i IGNORE_RULE, --ignore-rule IGNORE_RULE
                        rule to ignore
  -r RULES_FILE, --rules-file RULES_FILE
                        rules file. One rule ID per line
  --server SERVER       launch in server mode listening at localhost:8000

Server mode options:
  -C, --show-in-console
                        show results in console
  -D, --dont-check      always returns OK although a rule matches

Some tools can have an alias (short-command, you can see it with the acp info command), so you can also run the command by using its alias.

APICheck has a repository of tools from which you can download them and access to their documentation in order to get usage information, APICheck documentation.

Tools & Pipelines

The power of APICheck resides in its capability of chaining tools by using *NIX-like pipelines.

In this example we’ll use a .json file that contains a message (in APICheck format) for searching sensitive data within the body of the Request (You can find this file at demo .json file)

$ cat demo-request.json | sensitive-data


 > rule           -> core-001
 > where          -> request
 > url            -> http://my-company.com/api/entry-point
 > description    -> Find 'password' keyword in flow data
 > sensitiveData  -> password

ApiCheck tools

This page contains a list of the currently available tools.

APICheck tools

Replay HTTP Requests

Replays a HTTP conversation capturing the new responses obtained

Send data to a proxy server

Read a request from stdin and send it to a proxy

APICheck proxy

launch a local proxy and intercept request / responses a perform some actions


curl with reqres output

Sensitive data detector

Find sensitive data in HTTP Request / Response / Headers

JWT token validator

Validates issued JWT tokens to check for common pitfalls

Edge tools

OpenAPI v2 Linter

Lint the endpoint specification provided using OpenAPI v2 spec

OpenAPI v3 checker

Check the endpoint specification provided using OpenAPI v3 spec

OpenAPI v3 Linter

Lint the endpoint specification provided using OpenAPI v3 spec