I've been using the online service from Esri to perform the Vehicle Routing Problem:
This works fine until I start passing a large number of stops. 70 seems ok but 140 tips it over the edge and gives me a Error 400 Bad Request. I thought I may have a syntax error somewhere so I tried sending the first and last 70 stops separately and it all worked fine.
I have a feeling that the Esri service is capping the JSON Url that I'm passing it, so I tried using POST instead of GET but all I get back is an Error 403 Forbidden response.
Other than writing the request to a public web server and sending the Url to the Esri service, how can I get a large JSON query to work with the online service?