# ECHO GET/POST JSON

Echo allows you to return a desired value.

Overview / explanation of the different options, links to github code.

* [ECHO Get](https://github.com/liquidapps-io/zeus-sdk/tree/master/boxes/groups/oracles/oracle-echo): `echo://${returnvalue}` - where return value is a `base64` string. `const returnvalue = Buffer.from("My return value").toString('base64')`
* [ECHO+JSON Get](https://github.com/liquidapps-io/zeus-sdk/tree/master/boxes/groups/oracles/oracle-echo): `echo+json://name/${returnvalue}`, `const returnvalue = Buffer.from('{"name":"Tal Muskal"}').toString('base64')`
* [ECHO+JSON Post](https://github.com/liquidapps-io/zeus-sdk/tree/master/boxes/groups/oracles/oracle-echo): `echo+post+json://timestamp/${body}/${content}` - where body is `const body = Buffer.from('{"block_num_or_id":"36568000"}').toString('base64')`. In this example you specify the type of request: `echo+post+json` then the key mapping `timestamp` then the body of the POST request, encoded in base64, then the URL path `const content = Buffer.from('{"timestamp":"2019-01-09T18:20:23.000"}').toString('base64');`.