Supabase Edge Functions Has Free Serverless Deno Functions — Deploy Globally in Seconds

Supabase Edge Functions Has Free Serverless Deno Functions

You have a Supabase project. You need server-side logic. You dont want to set up a whole backend. Edge Functions solve this in 30 seconds.

What Edge Functions Are

Supabase Edge Functions are serverless TypeScript/Deno functions that run on Deno Deploy's global edge network:

• Deno runtime — TypeScript first-class, no build step
• 500K invocations/month free — generous for most projects
• Global edge — runs close to your users
• Full Supabase access — database, auth, storage from functions
• Secrets management — env vars via CLI

Quick Start

# Create a function
supabase functions new hello-world

# Write the function
cat > supabase/functions/hello-world/index.ts << EOF
import { serve } from "https://deno.land/std/http/server.ts"
import { createClient } from "https://esm.sh/@supabase/supabase-js@2"

serve(async (req) => {
  const supabase = createClient(
    Deno.env.get("SUPABASE_URL")!,
    Deno.env.get("SUPABASE_ANON_KEY")!
  )
  const { data } = await supabase.from("users").select("*").limit(10)
  return new Response(JSON.stringify(data), {
    headers: { "Content-Type": "application/json" }
  })
})
EOF

# Deploy
supabase functions deploy hello-world

Free Tier

Resource	Free	Pro ($25/mo)
Invocations	500K/month	2M/month
Execution Time	150s max	150s max
Memory	256MB	256MB
Payload	6MB	6MB

Use Cases

• Webhooks — process Stripe, GitHub, or any webhook
• Cron jobs — scheduled tasks via pg_cron + Edge Functions
• API routes — custom endpoints with auth validation
• AI/ML — call OpenAI, Anthropic APIs with server-side keys
• Email sending — trigger emails on database events

Why Edge Functions Over Alternatives

1. No separate infra — lives in your Supabase project
2. Deno = modern — top-level await, TypeScript, Web APIs
3. Row Level Security — access Supabase with service role key
4. Local dev — supabase functions serve with hot reload

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Building serverless apps with Supabase? I help teams architect full-stack apps with Edge Functions, Auth, and Realtime.

📧 [e-mail] — Supabase consulting and setup

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