> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://respan.ai/docs/apis/caches/get-cached-response/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://respan.ai/_mcp/server.

# Get a cached response

GET https://api.respan.ai/api/caches/{cache_key}/

Retrieve a cached response by its organization-scoped cache key. API-key responses omit internal numeric IDs.

Reference: https://respan.ai/docs/apis/caches/get-cached-response

## Authentication

- `Authorization` header (bearer token, required) — Use your Respan API key for Respan API authentication. Enter only the Respan API key value; clients send Authorization: Bearer \<RESPAN\_API\_KEY>. For /api/responses, provider credentials such as Perplexity, OpenAI, or Azure OpenAI go in Settings -> Providers or respan\_params.credential\_override in the request body, not in this authentication field.
- `Authorization` header (bearer token, required) — Use a dashboard JWT only for dashboard-authenticated endpoints. Respan API-key endpoints use the respanApiKey auth field instead.

## Request

### Path parameters

- `cache_key` (string, required) — Organization-scoped cache key returned by the cache list endpoint.

## Response

### 200

Cached response details.

- `cache_key` (string, required) — Organization-scoped public cache key.
- `prompt_content` (string, required) — Prompt text extracted from the cached request.
- `response_content` (string, required) — Response text extracted from the cached response.
- `hit_count` (integer, required) — Live cache hit count enriched from ClickHouse.
- `timestamp` (datetime, required) — When the cache entry was created.
- `updated_at` (datetime, required) — When the cache entry was last updated.
- `id` (integer, optional) — Internal numeric ID. Present only for dashboard-JWT responses.
- `request_content` (string, optional) — Stored request text preview. The current backend serializer truncates this field to roughly the first 100 characters.
- `prompt_messages` (list of ApiCachesCacheKeyGetResponsesContentApplicationJsonSchemaPromptMessagesItems, optional) — Original prompt message array stored with the cache entry.
- `full_response` (ApiCachesCacheKeyGetResponsesContentApplicationJsonSchemaFullResponse, optional) — Full cached provider response object.
- `response_time` (double, optional) — Stored response time for the cached entry, in seconds.
- `expiry_date` (datetime, optional, nullable) — When the cache entry expires. `null` means no expiry date is set.

## Errors

### 403 Forbidden Error

The API key is missing, invalid or expired.

- `detail` (string, required)

### 404 Not Found Error

Cached response not found.

- `detail` (string, required)

## Types

### ApiCachesCacheKeyGetResponsesContentApplicationJsonSchemaPromptMessagesItems

### ApiCachesCacheKeyGetResponsesContentApplicationJsonSchemaFullResponse

Full cached provider response object.

## Examples

**Response**

```json
{
  "cache_key": "cached_response_550e8400-e29b-41d4_abc123def456",
  "prompt_content": "What is the capital of France?",
  "response_content": "The capital of France is Paris.",
  "hit_count": 42,
  "timestamp": "2026-04-10T12:00:00Z",
  "updated_at": "2026-04-10T12:00:00Z",
  "id": 123,
  "request_content": "What is the capital of France?",
  "prompt_messages": [
    {
      "role": "user",
      "content": "What is the capital of France?"
    }
  ],
  "full_response": {
    "choices": [
      {
        "message": {
          "role": "assistant",
          "content": "The capital of France is Paris."
        }
      }
    ]
  },
  "response_time": 0.5,
  "expiry_date": "2026-05-10T12:00:00Z"
}
```

**SDK Code**

```python
import requests

url = "https://api.respan.ai/api/caches/cache_key/"

headers = {"Authorization": "Bearer <respanApiKey>"}

response = requests.get(url, headers=headers)

print(response.json())
```

```javascript
const url = 'https://api.respan.ai/api/caches/cache_key/';
const options = {method: 'GET', headers: {Authorization: 'Bearer <respanApiKey>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.respan.ai/api/caches/cache_key/"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <respanApiKey>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.respan.ai/api/caches/cache_key/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <respanApiKey>'

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://api.respan.ai/api/caches/cache_key/")
  .header("Authorization", "Bearer <respanApiKey>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.respan.ai/api/caches/cache_key/', [
  'headers' => [
    'Authorization' => 'Bearer <respanApiKey>',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.respan.ai/api/caches/cache_key/");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Bearer <respanApiKey>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Authorization": "Bearer <respanApiKey>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.respan.ai/api/caches/cache_key/")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```