You can publish a page as a web service and consume it using JavaScript Object Notation (JSON).
To obtain a document based on JSON
- You can build applications that consume and display Microsoft Dynamics NAV data using JSON. This example assumes that you have registered and published a page web service in Microsoft Dynamics NAV. For more information, see Walkthrough: Creating and Interacting with a Page Web Service (OData). 
- Start Windows Internet Explorer. In the Address field, enter a URI in this format:  Copy Code Copy Code- http://<Server>:<WebServicePort>/<ServerInstance>/OData/<web service>?$format=json - If Microsoft Dynamics NAV Server is running on the local computer and is using the default Microsoft Dynamics NAV Server instance and OData port, and you have published a web service that is based on page 21 that is called Customer, then the address is:  Copy Code Copy Code- http://localhost:7048/DynamicsNAV/OData/Customer?$format=json - This generates a text file that contains metadata and data from the web service. You can open the file from the browser, or you can save it to disk.  Note Note- The value of the format attribute must be lowercase: - ?$format=json.- If you want to consume the web service as JSON-P, you can add the - ?$callback=<callback function name>parameter.- You can use a similar URI to return the web service as an AtomPub document, in which case the attribute is - ?$format=atom. For more information, see How to: Use OData to Return/Obtain an AtomPub Document.




