Custom Code Management

Concepts

Webflow custom code: register (store script) → apply (attach to site). Inline scripts only via MCP (max 10,000 chars).

Important note

ALWAYS use Webflow MCP tools for all operations: Use the following tools for all operations:

• •data_scripts_tool with actions list_registered_scripts / list_applied_scripts - List scripts
• •data_scripts_tool with action add_inline_site_script - Register inline script (no <script> tags)
• •data_scripts_tool with action delete_all_site_scripts - Remove ALL scripts (no selective delete)
• •data_sites_tool with action list_sites - List available sites

Instructions

View Scripts

1. •Call data_sites_tool with action list_sites if needed, then call both list tools in parallel
2. •Display registration and application status

Add Script

1. •Gather: name, code, location (header/footer)
2. •Validate: under 10,000 chars, no <script> tags
3. •Preview with character count, require "add" to confirm
4. •Call data_scripts_tool with action add_inline_site_script with displayName, sourceCode, version, location, canCopy
5. •Remind user to publish

Remove Scripts

1. •List current scripts
2. •Warn: removes ALL scripts (no selective delete)
3. •Require "delete all" to confirm
4. •Remind user to publish

Constraints

• •Max 10,000 characters per script
• •Do NOT include <script> tags (Webflow adds them)
• •displayName + version must be unique
• •Site-level only (no page-specific via MCP)
• •Hosted scripts not available via MCP

Response Format

After adding a script, respond with the script name, location, and version. Suggest using the safe-publish skill to publish changes.