Slumber comes with only a couple options.


Out of the box Slumber should support any authentication method supported by requests. These include Basic, Digest, OAuth. However only Basic and Digest get tested currently.

Specify Authentication

Specifying authentication credentials is easy. When you create your slumber api instance, instead of doing:

api = slumber.API("http://path/to/my/api/")

You supply the username and password (for Basic Auth) like:

api = slumber.API("http://path/to/my/api/", auth=("myuser", "mypass"))

And slumber will attempt to use those credentials with each request.

To Use Digest or OAuth please consult the requests documentation. The auth argument is passed directly to requests and thus works exactly the same way and accepts exactly the same arguments.

File uploads

You may upload files by supplying a dictionary in the form {‘key’: file-like-object} as the value of the files parameter in post, patch or put calls. E.g.:

with open('/home/philip/out.txt') as fp:
    api.file.post({'name': 'my file'}, files={'file': fp})

Will do a POST to /api/file/ with a multipart-form-data request.


Slumber allows you to use any serialization you want. It comes with json and yaml but creating your own is easy. By default it will attempt to use json. You can change the default by specifying a format argument to your api class.:

# Use Yaml instead of Json
api = slumber.API("http://path/to/my/api/", format="yaml")

If you want to override the serializer for a particular request, you can do that as well:

# Use Yaml instead of Json for just this request.
api = slumber.API("http://path/to/my/api/") # Serializer defaults to Json
api.resource_name(format="yaml").get() # Serializer will be Yaml

If you want to create your own serializer you can do so. A serialize inherits from slumber.serialize.BaseSerializer and implements loads, dumps. It also must have a class member of key which will be the string key for this serialization (such as “json”).The final requirement is either a class member of content_type which is the content type to use for requests (such as “application/json”) or define a get_content_type method.

An example:

class PickleSerializer(slumber.serialize.BaseSerializer):
    key = "pickle"
    content_type = "x-application/pickle"

    def loads(self, data):
        return pickle.loads(data)

    def dumps(self, data):
        return pickle.dumps(data)

Once you have a custom serializer you can pass it to slumber like so:

from slumber import serialize
import slumber

s = serialize.Serializer(
api = slumber.API("http://example.com/api/v1/", format="pickle", serializer=s)


Slumber assumes by default that all urls should end with a slash. If you do not want this behavior you can control it via the append_slash option which can be set by passing append_slash to the slumber.API kwargs.

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