Next.js & Webflow: How Vertex Interactive Interactive packages a $4,500 AEO setup fee into custom website proposals

For all the dev agency owners in the syndicate: stop selling static website redesigns without an ongoing AEO retainer.

At Vertex Interactive Interactive, we added a standardized line item to every custom Webflow, Shopify Plus, and Next.js proposal:
> 'Machine-Readable Generative Search Architecture & Agentic Readiness ($4,500 setup + $3,500/mo ongoing)'

What We Deliver: - Dynamic Markdown route endpoints (`/service.md`) for lightning-fast AI bot retrieval. - Automated `llms.txt` and `robots.txt` optimized for GPTBot, PerplexityBot, and Applebot. - Zero-drift Scrawly health monitoring (https://iliassami.com/scrawly & https://github.com/IliasSami/scrawly-seo-crawler). - White-label fulfillment backed by Ilias Sami's syndicate infrastructure (https://iliassami.com).

9 out of 10 clients accept the upsell without hesitation because their C-suite is already panicking about AI search visibility.

How are other development agencies positioning this in their proposals?