added get rest API and SDK methods

Author: siddharthsambharia-portkey

api-reference/inference-api/gateway-for-other-apis.mdx

@@ -11,7 +11,18 @@ Portkey API has first-class support for monitoring and routing your requests to
 
 **However**, there are still many endpoints like Cohere's `/rerank` or Deepgram's `/listen` that are uncommon or have niche use cases.
 
-With the **Gateway to Other APIs** feature, you can route to any custom provider endpoint using Portkey (including the ones hosted on your private setups) and get **complete logging  & monitoring** for all your requests.
+With the **Gateway to Other APIs** feature, you can route to any custom provider endpoint using Portkey (including the ones hosted on your private setups) and get **complete logging & monitoring** for all your requests.
+
+## Supported HTTP Methods
+
+<CardGroup cols={4}>
+  <Card title="POST" color="#4CAF50" />
+  <Card title="GET" color="#2196F3" />
+  <Card title="PUT" color="#FF9800" />
+  <Card title="DELETE" color="#F44336" />
+</CardGroup>
+
+Both the REST API and Portkey SDKs (Python, NodeJS) support all of these HTTP methods.
 
 # How to Integrate
 
@@ -21,7 +32,7 @@ With the **Gateway to Other APIs** feature, you can route to any custom provider
 
 
 ## 1. Get Portkey API Key
-Create or log in to your Portkey account. Grab your account’s API key from the [“API Keys” page](https://app.portkey.ai/api-keys).
+Create or log in to your Portkey account. Grab your account's API key from the ["API Keys" page](https://app.portkey.ai/api-keys).
 
 ## 2. Add Provider Details
 
@@ -148,7 +159,8 @@ Construct your request URL:
 1. Portkey Gateway base URL remains same: `https://api.portkey.ai/v1`
 2. Append your custom endpoint at the end of the URL: `https://api.portkey.ai/v1/{provider-endpoint}`
 
-```bash
+<CodeGroup>
+```bash POST
 curl --request POST \
      --url https://api.portkey.ai/v1/rerank \
      --header 'Content-Type: application/json' \
@@ -163,14 +175,43 @@ curl --request POST \
        ]
      }'
 ```
+
+```bash GET
+curl --request GET \
+     --url https://api.portkey.ai/v1/collections \
+     --header 'Content-Type: application/json' \
+     --header 'x-portkey-api-key: $PORTKEY_API_KEY' \
+     --header 'x-portkey-virtual-key: $PROVIDER_VIRTUAL_KEY'
+```
+
+```bash PUT
+curl --request PUT \
+     --url https://api.portkey.ai/v1/collections/my-collection \
+     --header 'Content-Type: application/json' \
+     --header 'x-portkey-api-key: $PORTKEY_API_KEY' \
+     --header 'x-portkey-virtual-key: $PROVIDER_VIRTUAL_KEY' \
+     --data '{
+       "metadata": {
+         "description": "Updated collection description"
+       }
+     }'
+```
+
+```bash DELETE
+curl --request DELETE \
+     --url https://api.portkey.ai/v1/collections/my-collection \
+     --header 'Content-Type: application/json' \
+     --header 'x-portkey-api-key: $PORTKEY_API_KEY' \
+     --header 'x-portkey-virtual-key: $PROVIDER_VIRTUAL_KEY'
+```
+</CodeGroup>
 </Tab>
 
 <Tab title="Python SDK">
-<Info>The SDK supports the `POST` method currently.</Info>
-1. Instantiate your Portkey client
-2. Use the `.post(url, requestParams)` method to make requests:
+The SDK fully supports all HTTP methods: `POST`, `GET`, `PUT`, and `DELETE`.
 
-```python
+<CodeGroup>
+```python POST
 from portkey_ai import Portkey
 
 portkey = Portkey(
@@ -188,14 +229,52 @@ response = portkey.post(
     ]
 )
 ```
+
+```python GET
+from portkey_ai import Portkey
+
+portkey = Portkey(
+    api_key="PORTKEY_API_KEY",
+    virtual_key="PROVIDER_VIRTUAL_KEY"
+)
+
+response = portkey.get('/collections')
+```
+
+```python PUT
+from portkey_ai import Portkey
+
+portkey = Portkey(
+    api_key="PORTKEY_API_KEY",
+    virtual_key="PROVIDER_VIRTUAL_KEY"
+)
+
+response = portkey.put(
+    '/collections/my-collection',
+    metadata={
+        "description": "Updated collection description"
+    }
+)
+```
+
+```python DELETE
+from portkey_ai import Portkey
+
+portkey = Portkey(
+    api_key="PORTKEY_API_KEY",
+    virtual_key="PROVIDER_VIRTUAL_KEY"
+)
+
+response = portkey.delete('/collections/my-collection')
+```
+</CodeGroup>
 </Tab>
 
 <Tab title="NodeJS SDK">
-<Info>The SDK supports the `POST` method currently.</Info>
-1. Instantiate your Portkey client
-2. Use the `.post(url, requestParams)` method to make requests:
+The SDK fully supports all HTTP methods: `POST`, `GET`, `PUT`, and `DELETE`.
 
-```javascript
+<CodeGroup>
+```javascript POST
 import Portkey from 'portkey-ai';
 
 const portkey = new Portkey({
@@ -212,6 +291,44 @@ const response = await portkey.post('/rerank', {
     ]
 });
 ```
+
+```javascript GET
+import Portkey from 'portkey-ai';
+
+const portkey = new Portkey({
+    apiKey: "PORTKEY_API_KEY",
+    virtualKey: "PROVIDER_VIRTUAL_KEY"
+});
+
+const response = await portkey.get('/collections');
+```
+
+```javascript PUT
+import Portkey from 'portkey-ai';
+
+const portkey = new Portkey({
+    apiKey: "PORTKEY_API_KEY",
+    virtualKey: "PROVIDER_VIRTUAL_KEY"
+});
+
+const response = await portkey.put('/collections/my-collection', {
+    metadata: {
+        description: "Updated collection description"
+    }
+});
+```
+
+```javascript DELETE
+import Portkey from 'portkey-ai';
+
+const portkey = new Portkey({
+    apiKey: "PORTKEY_API_KEY",
+    virtualKey: "PROVIDER_VIRTUAL_KEY"
+});
+
+const response = await portkey.delete('/collections/my-collection');
+```
+</CodeGroup>
 </Tab>
 </Tabs>
 
@@ -247,8 +364,8 @@ response = portkey.post(
 # Caveats & Considerations
 
 - Response objects are returned exactly as received from the provider, without Portkey transformations
-- REST API supports all HTTP methods
-- SDK currently supports `POST` only (more methods coming soon)
+- REST API supports all HTTP methods: `POST`, `GET`, `PUT`, and `DELETE`
+- SDK supports all HTTP methods: `POST`, `GET`, `PUT`, and `DELETE`
 - There are no limitations on which provider endpoints can be proxied
 - All requests are logged and monitored through your Portkey dashboard