Skip to main content

Client and Validator of OpenAPI 3 Specifications

Project description

A Python OpenAPI 3 Specification client and validator for Python 3.


This is a work in progress, and may change significantly in the future. Many features are presently absent, and many common cases may not be implemented.

Validation Mode

This module can be run against a spec file to validate it like so:

python3 -m openapi /path/to/spec

Usage as a Client

This library also functions as an interactive client for arbitrary OpenAPI 3 specs. For example, using Linode’s OpenAPI 3 Specification for reference:

from openapi3 import OpenAPI

# load the spec file and read the yaml
with open('openapi.yaml') as f:
    spec = yaml.safe_load(

# parse the spec into python - this will raise if the spec is invalid
api = OpenAPI(spec)

# call operations and receive result models
regions = api.call_getRegions()

# authenticate using a securityScheme defined in the spec's components.securtiySchemes
api.authenticate('personalAccessToken', my_token)

# call an operation that requires authentication
linodes  = api.call_getLinodeInstances()

# call an opertaion with parameters
linode = api.call_getLinodeInstance(parameters={"linodeId": 123})

# the models returns are all of the same (generated) type
print(type(linode))                      # openapi.schemas.Linode
type(linode) == type([0])    # True

# call an operation with a request body
new_linode = api.call_createLinodeInstance(data={"region":"us-east","type":"g6-standard-2"})

# the returned models is still of the correct type
type(new_linode) == type(linode)     # True

HTTP basic authentication and HTTP digest authentication works like this:

# authenticate using a securityScheme defined in the spec's components.securtiySchemes
# Tuple with (username, password) as second argument
api.authenticate('basicAuth', ('username', 'password'))


The following still needs to be done:

  • Request body models, creation, and validation.

  • Parameters interface with validation and explicit typing.

  • Support for more authentication types.

  • Support for non-json request/response content.

  • Full support for all objects defined in the specification.

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

openapi3-0.0.2.tar.gz (23.1 kB view hashes)

Uploaded Source

Built Distribution

openapi3-0.0.2-py3-none-any.whl (20.8 kB view hashes)

Uploaded Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page