AbuseGraph + Supabase

Score Supabase Auth signup and login from an Edge Function — forward browser toCheckBody for a full score.

Quick path

Set ABUSEGRAPH_* secrets on your Edge Function.
Deploy a function that POSTs to https://abusegraph.com/api/v1/check.
On the client, collect SDK signals and call the function before/after signUp / signInWithPassword.

Keys

Key	Env	Use
Secret	`ABUSEGRAPH_SECRET_KEY` (`sk_test_…` / `sk_live_…`)	Server `/api/v1/check`
Publishable	`NEXT_PUBLIC_ABUSEGRAPH_PUBLISHABLE_KEY` (`pk_test_…`)	Browser SDK
Site	`ABUSEGRAPH_SITE`	DNS-verified domain

Free includes 1,000 live API checks / month after DNS verify. Test keys never bill.

Env

Edge Function secrets:

ABUSEGRAPH_SITE=yourdomain.com
ABUSEGRAPH_CHECK_URL=https://abusegraph.com/api/v1/check
ABUSEGRAPH_SECRET_KEY=sk_test_…
NEXT_PUBLIC_ABUSEGRAPH_PUBLISHABLE_KEY=pk_test_…

Use sk_live_… / pk_live_… in production after DNS verify.

Server check

Supabase Edge Functions use Deno fetch — POST to https://abusegraph.com/api/v1/check. Events: signup | login | password_reset | email_change. Optional sessionId.

Load the browser SDK from the AbuseGraph CDN before your signup/login code. The publishable key is safe to expose; send the resulting body to your own backend, which makes the authoritative check with its server-held secret key.

<script src="https://abusegraph.com/sdk/abusegraph.min.js"></script>
<script>
  const sdk = AbuseGraph.init({ publicKey: "pk_test_…" });

  async function collectForAuth(email, event = "signup") {
    const collected = await sdk.collect();
    const evaluated = await sdk.evaluate(collected, { email });
    return sdk.toCheckBody(collected, {
      email,
      event,
      verdictToken: evaluated.verdictToken?.token,
    });
  }
</script>

POST the returned JSON to your own endpoint. Never treat the browser result as the authoritative decision or put an sk_ key in browser code.

Supabase Edge Function

import "jsr:@supabase/functions-js/edge-runtime.d.ts"

Deno.serve(async (req) => {
  const { email, event = "signup", userId, sessionId, ...browserFields } =
    await req.json()

  const site = Deno.env.get("ABUSEGRAPH_SITE")!
  const res = await fetch(
    Deno.env.get("ABUSEGRAPH_CHECK_URL") ??
      "https://abusegraph.com/api/v1/check",
    {
      method: "POST",
      headers: {
        "content-type": "application/json",
        "x-api-key": Deno.env.get("ABUSEGRAPH_SECRET_KEY")!,
        "x-abusegraph-site": site,
      },
      body: JSON.stringify({
        ...browserFields,
        email,
        userId,
        sessionId,
        event,
        site,
      }),
    },
  )

  if (res.status === 402) {
    return new Response("credits_exhausted", { status: 402 })
  }

  const result = await res.json()
  if (result.verdict === "block") {
    return Response.json(result, { status: 403 })
  }

  return Response.json(result)
})

Client call before signup:

const browserFields = await collectForAuth(email, "signup")
const { data, error } = await supabase.functions.invoke("abusegraph-check", {
  body: { email, event: "signup", ...browserFields },
})
if (error || data?.verdict === "block") throw new Error("Signup blocked")
await supabase.auth.signUp({ email, password })

Lifecycle events

login — invoke the function with event: "login" after signInWithPassword.
password_reset — call on reset request with event: "password_reset".
email_change — call before applying the email update with event: "email_change".

Platform

Lists, rules, and linked accounts apply on every check — configure in the console. Optional session: POST /api/v1/session. Native apps: iOS, Android, React Native.