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Is there an online application that can be used to test out an API?

I am interested in one that supports a REST API with basic authentication. I know there is a Firefox plugin that I could use for this, but was wondering if there is a web app.

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2 Answers 2

If it's an OData endpoint, you can use the excellent OData Explorer:

Or the latest version of LinqPad which supports OData data sources:

For "generic" HTTP/REST services, you can use Fiddler to capture requests and replay them later:

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Give this a try


They support Twitter , SimpleGeo and other popular Web Services API for testing.

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