AbuseGraph + Next.js App Router

Server Action with createCheckClient — browser SDK toCheckBody before creating the user.

Quick path

Install @abusegraph/sdk and @abusegraph/server; paste keys from the console.
On the signup form, run collect → evaluate → toCheckBody.
Pass the body into a Server Action that calls createCheckClient.check before user creation.

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

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

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

Server check

Use @abusegraph/server createCheckClient. Events: signup | login | password_reset | email_change. Optional sessionId.

import { createCheckClient } from "@abusegraph/server"

const abusegraph = createCheckClient({
  secretKey:
    process.env.NODE_ENV === "production"
      ? process.env.ABUSEGRAPH_SECRET_KEY! // sk_live_…
      : process.env.ABUSEGRAPH_SECRET_KEY_TEST ??
        process.env.ABUSEGRAPH_SECRET_KEY!, // sk_test_…
  site: process.env.ABUSEGRAPH_SITE!,
})

Browser signals (recommended)

init + collect + evaluate + toCheckBody — NEVER bare sdk.check() alone as the authoritative decision.

"use client"

import { init } from "@abusegraph/sdk"

const sdk = init({
  publicKey: process.env.NEXT_PUBLIC_ABUSEGRAPH_PUBLISHABLE_KEY!, // pk_test_…
})

export async function collectForSignup(email: string) {
  const collected = await sdk.collect()
  const edge = await sdk.evaluate(collected, { email })
  return sdk.toCheckBody(collected, {
    email,
    event: "signup",
    verdictToken: edge.verdictToken.token,
  })
}

Next.js Server Action

"use server"

import { createCheckClient } from "@abusegraph/server"

const abusegraph = createCheckClient({
  secretKey: process.env.ABUSEGRAPH_SECRET_KEY!,
  site: process.env.ABUSEGRAPH_SITE!,
})

export async function signup(input: {
  email: string
  password: string
  browserFields: Record<string, unknown>
}) {
  const result = await abusegraph.check({
    email: input.email,
    event: "signup",
    ...input.browserFields,
  })

  if (result.verdict === "block") {
    return { ok: false, error: "Unable to create account" }
  }

  // create user in your DB / auth provider
  return { ok: true, summary: result.summary }
}

Form submit:

const browserFields = await collectForSignup(email)
await signup({ email, password, browserFields })

Lifecycle events

login — separate Server Action with event: "login" before issuing a session.
password_reset — call check in reset handler with event: "password_reset".
email_change — call after 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.

Verify

Submit signup once with sk_test_…, then open Activity. Blocked signups should return an error before user creation.

AbuseGraph + Next.js App Router

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