Cache by status code

Enterprise customers can set cache time-to-live (TTL) based on the response status from the origin web server. Cache TTL refers to the duration of a resource in the Cloudflare network before being marked as STALE or discarded from cache. Status codes are returned by a resource’s origin.

Setting cache TTL based on response status overrides the default cache behavior (standard caching) for static files and overrides cache instructions sent by the origin web server. To cache non-static assets, set a Cache Level of Cache Everything using a Cache Rule. Setting no-store Cache-Control or a low TTL (using max-age/s-maxage) increases requests to origin web servers and decreases performance.

Caching limits

The maximum caching limit for Free, Pro, and Business customers is 512 MB per file, and the maximum caching limit for Enterprise customers is 5 GB per file. If you need to raise the limits, contact your Customer Success Manager.

Edge TTL

By default, Cloudflare caches certain HTTP response codes with the following Edge Cache TTL when a cache-control directive or expires response header are not present.

HTTP status code	Default TTL
200, 206, 301	120m
302, 303	20m
404, 410	3m

All other status codes are not cached by default.

Set cache TTL by response status via the Cloudflare dashboard

To set cache TTL by response status, create a Cache Rule for Cache TTL by status code.

Set cache TTL by response status via the Cloudflare API

Request

curl --request PUT \
"https://api.cloudflare.com/client/v4/zones/{zone_id}/rulesets/{ruleset_id}" \
--header "Authorization: Bearer <API_TOKEN>" \
--header "Content-Type: application/json" \
--data '{
  "rules": [
    {
      "expression": "(http.host eq \"www.example.com\")",
      "description": "set cache TTL by response status",
      "action": "set_cache_settings",
      "action_parameters": {
        "cache": true,
        "edge_ttl": {
          "status_code_ttl": [
            {
              "status_code_range": {
                "to": 299
              },
              "value": 86400
            },
            {
              "status_code_range": {
                "from": 300,
                "to": 499
              },
              "value": 0  // no-cache
            },
            {
              "status_code_range": {
                "from": 500
              },
              "value": -1  // no-store
            }
          ],
          "mode": "respect_origin"
        }
      }
    }
  ]
}'

Syntax

Provide a JSON object containing status codes and their corresponding TTLs. Each key-value pair in the cache TTL by status cache rule has the following syntax:

• status_code: An integer value such as 200 or 500. status_code matches the exact status code from the origin web server. Valid status codes are between 100-999.
• status_code_range: Integer values for from and to. status_code_range matches any status code from the origin web server within the specified range.
• value: An integer value that defines the duration an asset is valid in seconds or one of the following strings: no-store (equivalent to -1), no-cache (equivalent to 0).

Set cache TTL by response status via a Cloudflare Worker

The cacheTtlByStatus option is a version of the cacheTtl feature that designates a cache TTL for a request’s response status code (for example, { "200-299": 86400, 404: 1, "500-599": 0 }).