Command-line Interface


$ dredd '<API Description Document>' '<API Location>' [OPTIONS]


$ dredd ./


API Description Document (string)

URL or path to the API description document (API Blueprint, Swagger).
Sample values: ./api-blueprint.apib, ./swagger.yml, ./swagger.json,

API Location (string)

URL, the root address of your API.
Sample values:,

Configuration File

If you use Dredd repeatedly within a single project, the preferred way to run it is to first persist your configuration in a dredd.yml file. With the file in place you can then run Dredd every time simply just by:

$ dredd

Dredd offers interactive wizard to setup your dredd.yml file:

$ dredd init

See below how sample configuration file could look like. The structure is the same as of the Dredd Class configuration object.

reporter: apiary
  - "apiaryApiKey:yourSecretApiaryAPiKey"
  - "apiaryApiName:apiName"
dry-run: null
hookfiles: "dreddhooks.js"
sandbox: false
server: rails server
server-wait: 3
init: false
custom: {}
names: false
only: []
output: []
header: []
sorted: false
user: null
inline-errors: false
details: false
method: []
level: info
timestamp: false
silent: false
path: []
blueprint: api-description.apib
endpoint: ""
Note: Do not get confused by Dredd using a keyword blueprint also for paths to Swagger documents. This is for historical reasons and will be changed in the future.

CLI Options Reference

Remember you can always list all available arguments by dredd --help.

--color, -c

Determines whether console output should include colors.
Default value: true


Path to dredd.yml config file.
Default value: "./dredd.yml"

--custom, -j

Pass custom key-value configuration data delimited by a colon. E.g. -j ‘a:b’
Default value: []

--details, -d

Determines whether request/response details are included in passing tests.

--dry-run, -y

Do not run any real HTTP transaction, only parse API description document and compile transactions.

--header, -h

Extra header to include in every request. This option can be used multiple times to add multiple headers.
Default value: []


Show usage information.

--hookfiles, -f

Specifies a pattern to match files with before/after hooks for running tests. Files are executed in alphabetical order.


How long to wait between connecting to hooks worker and start of testing. [ms]
Default value: 100


How long to wait between attempts to connect to hooks worker. [ms]
Default value: 500


Total hook worker connection timeout (includes all retries). [ms]
Default value: 1500


Host of the hook worker.
Default value: ""


Port of the hook worker.
Default value: 61321


How long to wait between attempts to terminate hooks worker. [ms]
Default value: 500


How long to wait between trying to terminate hooks worker and killing it. [ms]
Default value: 5000


How long to wait for hooks worker to start. [ms]
Default value: 5000

--init, -i

Run interactive configuration. Creates dredd.yml configuration file.

--inline-errors, -e

Determines whether failures and errors are displayed as they occur (true) or aggregated and displayed at the end (false).

--language, -a

Language of hookfiles. Possible options are: nodejs, ruby, python, php, perl, go, rust
Default value: "nodejs"

--level, -l

The level of logging to output. Options: silly, debug, verbose, info, warn, error.
Default value: "info"

--method, -m

Restrict tests to a particular HTTP method (GET, PUT, POST, DELETE, PATCH). This option can be used multiple times to allow multiple methods.
Default value: []

--names, -n

Only list names of requests (for use in a hookfile). No requests are made.

--only, -x

Run only specified transaction name. Can be used multiple times
Default value: []

--output, -o

Specifies output file when using additional file-based reporter. This option can be used multiple times if multiple file-based reporters are used.
Default value: []

--path, -p

Additional API description paths or URLs. Can be used multiple times with glob pattern for paths.
Default value: []

--reporter, -r

Output additional report format. This option can be used multiple times to add multiple reporters. Options: junit, nyan, dot, markdown, html, apiary.
Default value: []

--sandbox, -b

Load and run non trusted hooks code in sandboxed container

--server, -g

Run API backend server command and kill it after Dredd execution. E.g. rails server


Set delay time in seconds between running a server and test run.
Default value: 3

--silent, -q

Silences commandline output.

--sorted, -s

Sorts requests in a sensible way so that objects are not modified before they are created. Order: CONNECT, OPTIONS, POST, GET, HEAD, PUT, PATCH, DELETE, TRACE.

--timestamp, -t

Determines whether console output should include timestamps.

--user, -u

Basic Auth credentials in the form username:password.


Show version number.