Product summary

Imposter is a mock server for REST APIs, OpenAPI (and Swagger) specifications, SOAP web services (and WSDL files), Salesforce and HBase APIs.

Run standalone mock servers in Docker, Kubernetes, AWS Lambda or on the JVM.
Embed mocks within your tests (JVM or Node.js) to remove external dependencies.
Script dynamic responses using JavaScript, Groovy or Java.
Capture data from requests, then store it or return a templated response.
Proxy an existing endpoint to replay its responses as a mock.

Getting started

To begin, check out our Getting started guide. See the User documentation for more.

run standalone mocks in place of real systems
turn an OpenAPI/Swagger file or WSDL file into a mock API for dev or QA (use it before the real API is built)
decouple your integration tests from the cloud/back-end systems and take control of your dependencies
validate your API requests against an OpenAPI specification
capture data to retrieve later, or use in templates to for conditional responses
proxy an existing endpoint to replay its responses as a mock

Send dynamic responses:

Provide mock responses using static files or customise behaviour based on characteristics of the request.
Power users can control mock responses with JavaScript or Java/Groovy script engines.
Advanced users can write their own plugins in a JVM language of their choice.

Imposter provides specialised mocks for the following scenarios: