References general file structure (methods)

content/references/rippled-api/public-rippled-methods/utility-methods/json.md

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+## json
+
+The `json` method is a proxy to running other commands, and accepts the parameters for the command as a JSON value. It is *exclusive to the Commandline client*, and intended for cases where the commandline syntax for specifying parameters is inadequate or undesirable.
+
+#### Request Format
+An example of the request format:
+
+<!-- MULTICODE_BLOCK_START -->
+
+*Commandline*
+
+```
+# Syntax: json method json_stanza
+rippled -q json ledger_closed '{}'
+```
+
+<!-- MULTICODE_BLOCK_END -->
+
+#### Response Format
+
+An example of a successful response:
+
+<!-- MULTICODE_BLOCK_START -->
+
+*WebSocket*
+
+```
+{
+   "result" : {
+      "ledger_hash" : "8047C3ECF1FA66326C1E57694F6814A1C32867C04D3D68A851367EE2F89BBEF3",
+      "ledger_index" : 390308,
+      "status" : "success"
+   }
+}
+```
+
+<!-- MULTICODE_BLOCK_END -->
+
+The response follows the [standard format](#response-formatting), with whichever fields are appropriate to the type of command made.

content/references/rippled-api/public-rippled-methods/utility-methods/ping.md

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+## ping
+[[Source]<br>](https://github.com/ripple/rippled/blob/master/src/ripple/rpc/handlers/Ping.cpp "Source")
+
+The `ping` command returns an acknowledgement, so that clients can test the connection status and latency.
+
+#### Request Format
+An example of the request format:
+
+<!-- MULTICODE_BLOCK_START -->
+
+*WebSocket*
+
+```
+{
+    "id": 1,
+    "command": "ping"
+}
+```
+
+*JSON-RPC*
+
+```
+{
+    "method": "ping",
+    "params": [
+        {}
+    ]
+}
+```
+
+*Commandline*
+
+```
+#Syntax: ping
+rippled ping
+```
+
+<!-- MULTICODE_BLOCK_END -->
+
+[Try it! >](ripple-api-tool.html#ping)
+
+The request includes no parameters.
+
+#### Response Format
+
+An example of a successful response:
+
+<!-- MULTICODE_BLOCK_START -->
+
+*WebSocket*
+
+```
+{
+    "id": 1,
+    "result": {},
+    "status": "success",
+    "type": "response"
+}
+```
+
+*JSON-RPC*
+
+```
+200 OK
+{
+    "result": {
+        "status": "success"
+    }
+}
+```
+
+<!-- MULTICODE_BLOCK_END -->
+
+The response follows the [standard format](#response-formatting), with a successful result containing no fields. The client can measure the round-trip time from request to response as latency.
+
+#### Possible Errors
+
+* Any of the [universal error types](#universal-errors).

content/references/rippled-api/public-rippled-methods/utility-methods/random.md

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+## random
+[[Source]<br>](https://github.com/ripple/rippled/blob/master/src/ripple/rpc/handlers/Random.cpp "Source")
+
+The `random` command provides a random number to be used as a source of entropy for random number generation by clients.
+
+#### Request Format
+An example of the request format:
+
+<!-- MULTICODE_BLOCK_START -->
+
+*WebSocket*
+
+```
+{
+    "id": 1,
+    "command": "random"
+}
+```
+
+*JSON-RPC*
+
+```
+{
+    "method": "random",
+    "params": [
+        {}
+    ]
+}
+```
+
+*Commandline*
+
+```
+#Syntax: random
+rippled random
+```
+
+<!-- MULTICODE_BLOCK_END -->
+
+The request includes no parameters.
+
+#### Response Format
+
+An example of a successful response:
+
+<!-- MULTICODE_BLOCK_START -->
+
+*WebSocket*
+
+```
+{
+    "id": 1,
+    "result": {
+        "random": "8ED765AEBBD6767603C2C9375B2679AEC76E6A8133EF59F04F9FC1AAA70E41AF"
+    },
+    "status": "success",
+    "type": "response"
+}
+```
+
+*JSON-RPC*
+
+```
+200 OK
+{
+    "result": {
+        "random": "4E57146AA47BC6E88FDFE8BAA235B900126C916B6CC521550996F590487B837A",
+        "status": "success"
+    }
+}
+```
+
+<!-- MULTICODE_BLOCK_END -->
+
+The response follows the [standard format](#response-formatting), with a successful result containing the following field:
+
+| `Field`  | Type   | Description               |
+|:---------|:-------|:--------------------------|
+| `random` | String | Random 256-bit hex value. |
+
+#### Possible Errors
+
+* Any of the [universal error types](#universal-errors).
+* `internal` - Some internal error occurred, possibly relating to the random number generator.