Social Media API Integration for SaaS

I'm building a SaaS where influencers create media kits for businesses, and I need social media API integration. The work must use read-only scopes only, with no publishing or content_publish access. Tokens must stay server-side and never reach the client, and the integration must be built using Supabase Edge Functions in Deno/TypeScript. No separate backend is allowed, and proposals suggesting additional services like Django or Node will be declined. Work will happen on a dev branch via fork and PR, with no production access. NDA and GDPR-compliant data processing agreement are required.