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An open-source Vercel serverless proxy solution that automatically injects structured data into Substack pages to enhance visibility and citation rates in AI search engines.
Section 01
This article introduces the open-source Vercel serverless proxy solution substack-aeo-proxy, which helps Substack creators solve visibility issues in AI search by automatically injecting JSON-LD structured data. The solution uses non-intrusive optimization—no need to modify existing content, easy to deploy, and can increase citation rates and traffic of content in AI systems.
Section 02
With the popularity of AI tools like ChatGPT and Perplexity, users' information acquisition methods have shifted to AEO (Answer Engine Optimization). The Substack platform is simple and easy to use, but its structured data marking has limitations—plain text content is difficult for AI systems to accurately understand and prioritize, leaving creators facing visibility challenges.
Section 03
substack-aeo-proxy is an open-source Vercel serverless proxy solution developed by the Digital Department team. Its core is to inject JSON-LD structured data through the content delivery layer, adding AI-friendly semantic tags to Substack pages. Its core concept is "non-intrusive optimization"—creators can gain AEO capabilities without modifying backend settings or article formats.
Section 04
Built on Vercel Edge Functions, the workflow is: 1. Real-time fetching of original Substack pages; 2. Parsing HTML to extract key elements; 3. Generating Schema.org-standard JSON-LD tags; 4. Injecting into the page's <head>; 5. Returning the enhanced page.
Automatically adds Schema types like Article, Organization, BreadcrumbList, and WebSite, complying with mainstream search engine standards and AI system recognition requirements.
Provides prompt templates, supporting customized functions such as extracting key topics, generating summary tags, identifying content types, and suggesting internal links.
Section 05
SUBSTACK_DOMAIN environment variable; 4. Vercel automatically deploys; 5. Update DNS to point to the Vercel address (completes within 15 minutes, free with Vercel Hobby plan).Supports deep optimization such as custom JSON-LD templates, third-party API integration, adding social media tags, and A/B testing.
Section 06
Structured data makes content easier for AI systems like Perplexity and ChatGPT to recognize as authoritative sources, leading to passive traffic growth, brand authority establishment, and acquisition of new readers.
Structured data also enhances rich media result display, knowledge graph inclusion, and voice search performance.
The cumulative effect of AI citations forms a positive cycle, especially beneficial for long-term exposure of in-depth content.
Section 07
The proxy layer increases complexity—Vercel service interruptions or configuration errors may cause access anomalies. It is recommended to keep the original address, set up monitoring, and perform regular backups.
AEO is an amplifier, not a substitute—content value is the core of sustained traffic.
Schema.org and AI understanding capabilities are evolving rapidly; it is necessary to pay attention to project updates and adjust strategies accordingly.
Section 08
substack-aeo-proxy provides Substack creators with a low-cost solution to adapt to the AI search era. Recommended actions: 1. Evaluate the AI citation status of existing content; 2. Pilot AEO transformation deployment; 3. Monitor changes in AI-recommended traffic; 4. Iteratively optimize markup strategies and content directions. Creators who proactively adapt to new rules will gain a first-mover advantage.
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