doc: App development updated with standard connection URI format

Changelog-None.

Author: ShahanaFarooqui

doc/developers-guide/app-development.md

@@ -4,6 +4,9 @@ slug: "app-development"
 excerpt: "Build a lightning application using Core Lightning APIs."
 hidden: false
 ---
+
+## Interacting with CLN Node
+
 There are several ways to connect and interact with a Core Lightning node in order to build a lightning app or integrate lightning in your application.
 
 - Using **[JSON-RPC commands](doc:json-rpc)** if you're building an application in the same system as the CLN node.
@@ -13,6 +16,69 @@ There are several ways to connect and interact with a Core Lightning node in ord
 - Using **[WSS Proxy](doc:wss-proxy)** to connect to a CLN node over web secure socket proxy.
 - Third-party libraries that offer **[JSON over HTTPS](doc:third-party-libraries#json-over-https)** or **[GraphQL](doc:third-party-libraries#graphql)** (deprecated) frameworks to connect to a CLN node remotely.
 
+## CLN connection URIs
+
+This section outlines the standard URI formats for connecting to Core Lightning (CLN) nodes via different protocols.
+
+### Commando WebSocket Connection
+```
+commando+<protocol>://<cln-host>:<ws-port>?pubkey=<pubkey>&rune=<rune>&invoiceRune=<invoice-rune>&certs=<combined-base64-encoded-clientkey-clientcert-cacert>
+```
+
+#### Parameters:
+- protocol: ws or wss (WebSocket or secure WebSocket)
+- cln-host: Hostname or IP address of the CLN node
+- ws-port: WebSocket port
+- pubkey: Node's public key (hex encoded)
+- rune: Authentication rune for general commands
+- invoiceRune: Specific rune for invoice creation (optional)
+- certs: Base64-encoded concatenation of client key, client cert, and CA cert
+
+#### Example:
+
+```
+commando+wss://cln.local:5001?pubkey=023456789abcdef&rune=8hJ6ZKFvRune&invoiceRune=5kJ3ZKFvInvRune&certs=LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0t
+```
+
+### REST API Connection
+```
+clnrest+<protocol>://<rest-host>:<rest-port>?rune=<rune>&certs=<combined-base64-encoded-clientkey-clientcert-cacert>
+```
+
+#### Parameters:
+- protocol: http or https
+- rest-host: Hostname or IP address of the REST interface
+- rest-port: REST API port (typically 3010)
+- rune: Authentication rune for REST API access
+- certs: Base64-encoded concatenation of client key, client cert, and CA cert
+
+#### Example:
+
+```
+clnrest+https://cln.local:3010?rune=8hJ6ZKFvRune&certs=LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0t
+```
+
+## gRPC Connection
+
+```
+clngrpc://<grpc-host>:<grpc-port>?pubkey=<pubkey>&protoPath=<path-to-proto>&certs=<combined-base64-encoded-clientkey-clientcert-cacert>
+```
+
+#### Parameters:
+- grpc-host: Hostname or IP address of the gRPC interface
+- grpc-port: gRPC port (typically 9736)
+- pubkey: Node's public key (hex encoded)
+- protoPath: Path to protocol buffer definition file (typically https://github.com/ElementsProject/lightning/tree/master/cln-grpc/proto)
+- certs: Base64-encoded concatenation of client key, client cert, and CA cert
+
+#### Example:
+
+```
+clngrpc://cln.grpc:9736?pubkey=023456789abcdef&protoPath=/path/to/cln.proto&certs=LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0t
+```
+
+## Image of available API interfaces and transport protocols
+
 [block:image]
 {
   "images": [