How to automate Webflow CMS and form workflows with n8n on Webflow Cloud

Automating Webflow form and CMS workflows with n8n on Webflow Cloud involves replacing a native form’s manual follow-up process with a Next.js application that validates submissions, signs them using an HMAC shared secret, and forwards them to an active n8n webhook. The setup requires a publicly accessible HTTPS n8n instance, a Webflow Cloud-compatible Next.js project using npm, Webflow API credentials for downstream CMS actions, and environment variables for the webhook URL, secret, allowed origin, and mounted app base path. In n8n, the workflow should preserve the raw request body, verify the signature with a timing-safe comparison, reject stale requests to prevent replay attacks, and then branch independently to CMS and notification actions. The Webflow Cloud Route Handler should use Web-standard APIs without the Next.js edge runtime directive, perform basic JSON, origin, email, and honeypot validation, while production deployments should also add rate limiting and execution caps. Client-side form requests must explicitly include the app mount path, since local development can conceal path errors that produce deployed 404 responses. Common deployment issues include unsupported runtime directives, missing environment variables, inactive or test-only n8n webhook URLs, incorrect base paths, and Node filesystem dependencies unavailable in the Cloudflare Workers environment.

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