Dynamic Script - execute code in an existing browser session.

POST/accounts/{account_id}/browser-rendering/script/{session_id}

Runs the provided code in an existing browser session. The session stays open; close it with DELETE /devtools/browser/:sessionId or browser.close(), otherwise it ends at the idle timeout.

Security

API Token

The preferred authorization scheme for interacting with the Cloudflare API. Create a token.

Example:Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY

API Email + API Key

The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key.

Example:X-Auth-Email: user@example.com

The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys.

Example:X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194

Accepted Permissions (at least one required)

Browser Rendering Write

Path ParametersExpand Collapse

account_id: string

Account ID.

session_id: string

Browser session ID

formatuuid

Body ParametersJSONExpand Collapse

code: string

Function body executed against the selected library’s runner.

library: optional "playwright" or "puppeteer"

Library the script runs with. Defaults to raw CDP when omitted.

One of the following:

"playwright"

"puppeteer"

targetId: optional string

Page target the script attaches to. Defaults to the session’s first page.

timeout: optional number

Maximum script run time in milliseconds.

maximum120000

minimum1

ReturnsExpand Collapse

result: string or number or boolean or 2 more

The script’s return value, or null when it returned nothing. Arrays nested inside arrays are also returned, but this schema does not describe them.

One of the following:

string

number

boolean

map[unknown]

array of string or number or boolean or map[unknown]

One of the following:

string

number

boolean

map[unknown]

success: true

Dynamic Script - execute code in an existing browser session.

curl https://api.cloudflare.com/client/v4/accounts/$ACCOUNT_ID/browser-rendering/script/$SESSION_ID \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
    -d '{
          "code": "code"
        }'

{
  "result": "string",
  "success": true
}

Returns Examples

{
  "result": "string",
  "success": true
}