Supabase Edge Functions
Deno-based edge functions with a guarded outbound path
Edge functions are Deno processes with fetch() and little else. Backfire gives them a target-validated path out plus a record of what each invocation did, without adding a database round trip to the call path.
What to expect
- Standard fetch() from Deno — no npm dependency and no import map changes.
- Keep the key in Supabase secrets so it never enters the repository.
- Blocked and unresolvable targets fail before a connection, and cost no trips.
- The envelope reports trips charged and the remaining balance on every call.
Working example
supabase-edge-functions
Deno.serve(async (req) => {
const res = await fetch('https://backfireapi.base44.app/functions/forward', {
method: 'POST',
headers: {
Authorization: `Bearer ${Deno.env.get('BACKFIRE_KEY')}`,
'Content-Type': 'application/json',
},
body: JSON.stringify({
url: 'https://api.example.com/v1/items',
method: 'GET',
timeout_ms: 8000,
}),
});
const envelope = await res.json();
return new Response(JSON.stringify(envelope), {
headers: { 'Content-Type': 'application/json' },
status: envelope.ok ? 200 : 502,
});
});Other environments
Questions about this
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