--- description: Manage resource monitoring, settings, and detected scripts using the client-side security API. title: Client-side security API image: https://developers.cloudflare.com/og-docs.png --- [Skip to content](#main-content) > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/client-side-security/llms.txt > Use this file to discover all available pages before exploring further. # Client-side security API Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://mchen-ai-models-sync.previews.developers.cloudflare.com/client-side-security/reference/api/index.md)|[Agent setup](https://mchen-ai-models-sync.previews.developers.cloudflare.com/agent-setup/) You can enable and disable client-side security's resource monitoring, configure settings, and fetch information about detected scripts and connections using the [client-side security API](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/methods/get/) (formerly known as Page Shield API). To authenticate API requests you need an [API token](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/get-started/create-token/). For more information on the required API token permissions, refer to [Roles and permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/client-side-security/reference/roles-and-permissions/). Note Refer to [API deprecations](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/deprecations/) for details on client-side security API changes. ## Endpoints You can obtain the complete endpoint by appending the [client-side security API](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/methods/get/) endpoints to the Cloudflare API base URL: ```txt https://api.cloudflare.com/client/v4 ``` The `{zone_id}` argument is the zone ID (a hexadecimal string). You can find this value in the Cloudflare dashboard or using the Cloudflare API's [/zones endpoint](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/account/find-account-and-zone-ids/). The `{script_id}` argument is the script ID (a hexadecimal string). This value is included in the response of the [List client-side security scripts](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/scripts/methods/list/) operation for every detected script. The `{connection_id}` argument is the connection ID (a hexadecimal string). This value is included in the response of the List client-side security connections API operation for every detected connection. The following table summarizes the available operations: | Operation | Method + URL stub | Notes | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------- | ---------------------------------------------------------------- | | [Get client-side security settings](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/methods/get/) | GET zones/{zone\_id}/page\_shield | Fetch client-side security settings (including the status). | | [Update client-side security settings](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/methods/update/) | PUT zones/{zone\_id}/page\_shield | Update client-side security settings. | | [List client-side security scripts](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/scripts/methods/list/) | GET zones/{zone\_id}/page\_shield/scripts | Fetch a list of detected scripts. | | [Get a client-side security script](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/scripts/methods/get/) | GET zones/{zone\_id}/page\_shield/scripts/{script\_id} | Fetch the details of a script. | | [List client-side security connections](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/connections/methods/list/) | GET zones/{zone\_id}/page\_shield/connections | Fetch a list of detected connections. | | [Get a client-side security connection](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/connections/methods/get/) | GET zones/{zone\_id}/page\_shield/connections/{connection\_id} | Fetch the details of a connection. | | [List client-side security cookies](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/cookies/methods/list/) | GET zones/{zone\_id}/page\_shield/cookies | Fetch a list of detected cookies. | | [Get a client-side security cookie](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/cookies/methods/get/) | GET zones/{zone\_id}/page\_shield/cookies/{cookie\_id} | Fetch the details of a cookie. | | [List content security rules](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/policies/methods/list/) | GET zones/{zone\_id}/page\_shield/policies | Fetch a list of all configured content security rules. | | [Get a content security rule](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/policies/methods/get/) | GET zones/{zone\_id}/page\_shield/policies/{policy\_id} | Fetch the details of a content security rule. | | [Create a content security rule](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/policies/methods/create/) | POST zones/{zone\_id}/page\_shield/policies | Creates a content security rule with the provided configuration. | | [Update a content security rule](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/policies/methods/update/) | PUT zones/{zone\_id}/page\_shield/policies/{policy\_id} | Updates an existing content security rule. | | [Delete a content security rule](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/policies/methods/delete/) | DELETE zones/{zone\_id}/page\_shield/policies/{policy\_id} | Deletes an existing content security rule. | ## API notes The malicious script classification (`Malicious` or `Not malicious`) is not directly available in the API. To determine this classification, compare the script's `js_integrity_score` value with the classification threshold, which is currently set to 10\. Scripts with a score value lower than the threshold are considered malicious. ## Common API calls ### Get client-side security settings This example obtains the current settings of Cloudflare's client-side security, including the status (enabled/disabled). Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield Read` * `Domain Page Shield` * `Page Shield Read` * `Zone Settings Write` * `Zone Settings Read` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield" \ --request GET \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" ``` ```json { "result": { "enabled": true, "updated_at": "2023-05-14T11:47:55.677555Z", "use_cloudflare_reporting_endpoint": true, "use_connection_url_path": false }, "success": true, "errors": [], "messages": [] } ``` ### Enable client-side security This example enables Cloudflare's client-side security in the specified zone. Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield` * `Zone Settings Write` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield" \ --request PUT \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" \ --json '{ "enabled": true }' ``` ```json { "result": { "enabled": true, "updated_at": "2023-05-14T11:50:41.756996Z" }, "success": true, "errors": [], "messages": [] } ``` ### Fetch list of detected scripts This `GET` request fetches a list of scripts detected by Cloudflare's client-side security on hostname `example.net`, requesting the first page with 15 items per page. The URL query string includes filtering and paging parameters. By default, the response will only include scripts with `active` status when you do not specify a `status` filter parameter in the URL query string. Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield Read` * `Domain Page Shield` * `Page Shield Read` * `Zone Settings Write` * `Zone Settings Read` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield/scripts?hosts=example.net&page=1&per_page=15" \ --request GET \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" ``` ```json { "result": [ { "id": "8337233faec2357ff84465a919534e4d", "url": "https://malicious.example.com/badscript.js", "added_at": "2023-05-18T10:51:10.09615Z", "first_seen_at": "2023-05-18T10:51:08Z", "last_seen_at": "2023-05-22T09:57:54Z", "host": "example.net", "domain_reported_malicious": false, "url_reported_malicious": true, "malicious_url_categories": ["Malware"], "first_page_url": "http://malicious.example.com/page_one.html", "status": "active", "url_contains_cdn_cgi_path": false, "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", "js_integrity_score": 10, "obfuscation_score": 10, "dataflow_score": 8, "malware_score": 8, "cryptomining_score": 9, "magecart_score": 8, "fetched_at": "2023-05-21T16:58:07Z" } // (...) ], "success": true, "errors": [], "messages": [], "result_info": { "page": 1, "per_page": 15, "count": 15, "total_count": 24, "total_pages": 2 } } ``` Some fields displayed in the example response may not be available, depending on your Cloudflare plan. For details on the available filtering, paging, and sorting parameters, refer to the [API reference](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/scripts/methods/list/). ### Fetch list of infrequently reported scripts This `GET` request fetches a list of infrequently reported scripts on hostname `example.net`, requesting the first page with 15 items per page. The URL query string includes filtering and paging parameters. Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield Read` * `Domain Page Shield` * `Page Shield Read` * `Zone Settings Write` * `Zone Settings Read` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield/scripts?hosts=example.net&page=1&per_page=15&status=infrequent" \ --request GET \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" ``` ```json { "result": [ { "id": "83c8da2267394ce8465b74c299658fea", "url": "https://scripts.example.com/anotherbadscript.js", "added_at": "2023-05-17T13:16:03.419619Z", "first_seen_at": "2023-05-17T13:15:23Z", "last_seen_at": "2023-05-18T09:05:20Z", "host": "example.net", "domain_reported_malicious": false, "url_reported_malicious": false, "first_page_url": "http://malicious.example.com/page_one.html", "status": "infrequent", "url_contains_cdn_cgi_path": false, "hash": "9245aad577e846dd9b990b1b32425a3fae4aad8b8a28441a8b80084b6bb75a45", "js_integrity_score": 48, "obfuscation_score": 49, "dataflow_score": 45, "malware_score": 45, "cryptomining_score": 37, "magecart_score": 49, "fetched_at": "2023-05-18T03:58:07Z" } // (...) ], "success": true, "errors": [], "messages": [], "result_info": { "page": 1, "per_page": 15, "count": 15, "total_count": 17, "total_pages": 2 } } ``` Some fields displayed in the example response may not be available, depending on your Cloudflare plan. For details on the available filtering, paging, and sorting parameters, refer to the [API reference](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/scripts/methods/list/). ### Get details of a detected script This `GET` request obtains the details of a script detected by Cloudflare's client-side security with script ID `8337233faec2357ff84465a919534e4d`. Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield Read` * `Domain Page Shield` * `Page Shield Read` * `Zone Settings Write` * `Zone Settings Read` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield/scripts/8337233faec2357ff84465a919534e4d" \ --request GET \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" ``` ```json { "result": { "id": "8337233faec2357ff84465a919534e4d", "url": "https://malicious.example.com/badscript.js", "added_at": "2023-05-18T10:51:10.09615Z", "first_seen_at": "2023-05-18T10:51:08Z", "last_seen_at": "2023-05-22T09:57:54Z", "host": "example.net", "domain_reported_malicious": false, "url_reported_malicious": true, "malicious_url_categories": ["Malware"], "first_page_url": "http://malicious.example.com/page_one.html", "status": "active", "url_contains_cdn_cgi_path": false, "hash": "9245aad577e846dd9b990b1b32425a3fae4aad8b8a28441a8b80084b6bb75a45", "js_integrity_score": 48, "obfuscation_score": 49, "dataflow_score": 45, "malware_score": 42, "cryptomining_score": 32, "magecart_score": 44, "fetched_at": "2023-05-21T16:58:07Z", "page_urls": [ "http://malicious.example.com/page_two.html", "http://malicious.example.com/page_three.html", "http://malicious.example.com/page_four.html" ], "versions": [ { "hash": "9245aad577e846dd9b990b1b32425a3fae4aad8b8a28441a8b80084b6bb75a45", "js_integrity_score": 48, "obfuscation_score": 49, "dataflow_score": 45, "malware_score": 42, "cryptomining_score": 32, "magecart_score": 44, "fetched_at": "2023-05-21T16:58:07Z" } ] }, "success": true, "errors": [], "messages": [] } ``` Some fields displayed in the example response may not be available, depending on your Cloudflare plan. ### Fetch list of detected connections This `GET` request fetches a list of connections detected by Cloudflare's client-side security, requesting the first page with 15 items per page. By default, the response will only include connections with `active` status when you do not specify a `status` filter parameter in the URL query string. Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield Read` * `Domain Page Shield` * `Page Shield Read` * `Zone Settings Write` * `Zone Settings Read` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield/connections?page=1&per_page=15" \ --request GET \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" ``` ```json { "result": [ { "id": "0a7bb628776f4e50a50d8594c4a01740", "url": "https://malicious.example.com", "added_at": "2022-09-18T10:51:10.09615Z", "first_seen_at": "2022-09-18T10:51:08Z", "last_seen_at": "2022-09-02T09:57:54Z", "host": "example.net", "domain_reported_malicious": true, "malicious_domain_categories": ["Malware", "Spyware"], "url_reported_malicious": false, "malicious_url_categories": [], "first_page_url": "https://example.net/one.html", "status": "active", "url_contains_cdn_cgi_path": false } // (...) ], "success": true, "errors": [], "messages": [], "result_info": { "page": 1, "per_page": 15, "count": 15, "total_count": 16, "total_pages": 2 } } ``` For details on the available filtering, paging, and sorting parameters, refer to the [API reference](https://mchen-ai-models-sync.previews.developers.cloudflare.com/api/resources/page%5Fshield/subresources/scripts/methods/list/). ### Get details of a detected connection This `GET` request obtains the details of a connection detected by Cloudflare's client-side security with connection ID `0a7bb628776f4e50a50d8594c4a01740`. Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield Read` * `Domain Page Shield` * `Page Shield Read` * `Zone Settings Write` * `Zone Settings Read` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield/connections/0a7bb628776f4e50a50d8594c4a01740" \ --request GET \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" ``` ```json { "result": { "id": "0a7bb628776f4e50a50d8594c4a01740", "url": "https://malicious.example.com", "added_at": "2022-09-18T10:51:10.09615Z", "first_seen_at": "2022-09-18T10:51:08Z", "last_seen_at": "2022-09-02T09:57:54Z", "host": "example.net", "domain_reported_malicious": true, "malicious_domain_categories": ["Malware", "Spyware"], "url_reported_malicious": false, "malicious_url_categories": [], "first_page_url": "https://example.net/one.html", "status": "active", "url_contains_cdn_cgi_path": false }, "success": true, "errors": [], "messages": [] } ``` ### Fetch list of detected cookies This `GET` request fetches a list of cookies detected by Cloudflare's client-side security, requesting the first page with 15 items per page. By default, the response will only include cookies with `active` status when you do not specify a `status` filter parameter in the URL query string. Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield Read` * `Domain Page Shield` * `Page Shield Read` * `Zone Settings Write` * `Zone Settings Read` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield/cookies?page=1&per_page=15" \ --request GET \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" ``` ```json { "result": [ { "id": "beee03ada7e047e79f076785d8cd8b8e", "type": "first_party", "name": "PHPSESSID", "host": "example.net", "domain_attribute": "example.net", "expires_attribute": "2024-10-21T12:28:20Z", "http_only_attribute": true, "max_age_attribute": null, "path_attribute": "/store", "same_site_attribute": "strict", "secure_attribute": true, "first_seen_at": "2024-05-06T10:51:08Z", "last_seen_at": "2024-05-07T11:56:01Z", "first_page_url": "example.net/store/products", "page_urls": ["example.net/store/products/1"] } // (...) ], "success": true, "errors": [], "messages": [], "result_info": { "page": 1, "per_page": 15, "count": 15, "total_count": 16, "total_pages": 2 } } ``` For details on the available filtering, paging, and sorting parameters, refer to [Make API calls](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/how-to/make-api-calls/#pagination). ### Get details of a detected cookie This `GET` request obtains the details of a cookie detected by Cloudflare's client-side security with ID `beee03ada7e047e79f076785d8cd8b8e`. Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield Read` * `Domain Page Shield` * `Page Shield Read` * `Zone Settings Write` * `Zone Settings Read` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield/cookies/beee03ada7e047e79f076785d8cd8b8e" \ --request GET \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" ``` ```json { "result": { "id": "beee03ada7e047e79f076785d8cd8b8e", "type": "first_party", "name": "PHPSESSID", "host": "example.net", "domain_attribute": "example.net", "expires_attribute": "2024-10-21T12:28:20Z", "http_only_attribute": true, "max_age_attribute": null, "path_attribute": "/store", "same_site_attribute": "strict", "secure_attribute": true, "first_seen_at": "2024-05-06T10:51:08Z", "last_seen_at": "2024-05-07T11:56:01Z", "first_page_url": "example.net/store/products", "page_urls": ["example.net/store/products/1"] }, "success": true, "errors": [], "messages": [] } ``` ### Create a content security rule This `POST` request creates a content security rule (previously called a policy) with _Log_ action, defining the following scripts as allowed based on where they are hosted: * Scripts hosted in `myapp.example.com` (which does not include scripts in `example.com`). * Scripts hosted in `cdnjs.cloudflare.com`. * The Google Analytics script using its full URL. * All scripts in the same origin (same HTTP or HTTPS scheme and hostname). All other scripts would trigger a rule violation, but those scripts would not be blocked. For more information on Content Security Policy (CSP) directives and values, refer to the [MDN documentation ↗](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Content-Security-Policy). Note For a list of CSP directives and keywords supported by content security rules, refer to [Supported CSP directives](https://mchen-ai-models-sync.previews.developers.cloudflare.com/client-side-security/rules/csp-directives/). Required API token permissions At least one of the following [token permissions](https://mchen-ai-models-sync.previews.developers.cloudflare.com/fundamentals/api/reference/permissions/) is required: * `Page Shield` * `Domain Page Shield` * `Zone Settings Write` ```bash curl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/page_shield/policies" \ --request POST \ --header "X-Auth-Email: $CLOUDFLARE_EMAIL" \ --header "X-Auth-Key: $CLOUDFLARE_API_KEY" \ --json '{ "description": "My first content security rule in log mode", "action": "log", "expression": "http.host eq \"myapp.example.com\"", "enabled": "true", "value": "script-src myapp.example.com cdnjs.cloudflare.com https://www.google-analytics.com/analytics.js '\''self'\''" }' ``` ```json { "success": true, "errors": [], "messages": [], "result": { "id": "", "description": "My first content security rule in log mode", "action": "log", "expression": "http.host eq \"myapp.example.com\"", "enabled": "true", "value": "script-src myapp.example.com cdnjs.cloudflare.com https://www.google-analytics.com/analytics.js 'self'" } } ``` To create a content security rule with an _Allow_ action instead of _Log_, use `"action": "allow"` in the request body. In the case of such rule, all scripts not allowed by the rule would be blocked. Was this helpful? YesNo ## On this page [![](https://mchen-ai-models-sync.previews.developers.cloudflare.com/_astro/logo.te5VL_aD.svg)Docs](https://mchen-ai-models-sync.previews.developers.cloudflare.com/) ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/client-side-security/reference/api/#page","headline":"Client-side security API · Client-side security docs","description":"Manage resource monitoring, settings, and detected scripts using the client-side security API.","url":"https://developers.cloudflare.com/client-side-security/reference/api/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","dateModified":"2026-08-24","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}} ```