Echo server for API testing. (http://echoapi.herokuapp.com/)

It bounces back the request headers (for JSON response) and request params/data.

GET http://echoapi.herokuapp.com/{status_code}/{anything}?param1=value1&param2=value2

• http://echoapi.herokuapp.com/200/abc?a=1&b=2
• http://echoapi.herokuapp.com/200/abc?callback=xyz (JSONP support)
• http://echoapi.herokuapp.com/302/http://www.example.com
• http://echoapi.herokuapp.com/400/bad
• http://echoapi.herokuapp.com/500/error

POST http://echoapi.herokuapp.com/{status_code}/{anything}

curl -v http://echoapi.herokuapp.com/200/ok -d '{"x":1}' -X POST -H "Content-Type: application/json"

PUT http://echoapi.herokuapp.com/{status_code}/{anything}

curl -v http://echoapi.herokuapp.com/200/ok -d '{"x":1}' -X PUT -H "Content-Type: application/json"

DELETE http://echoapi.herokuapp.com/{status_code}/{anything}

curl -v http://echoapi.herokuapp.com/200/ok -d '{"x":1}' -X DELETE -H "Content-Type: application/json"

To simulate slow response, add 'sleep' param:

http://echoapi.herokuapp.com/200/ok?sleep=10