Install guide · ecommerce · ~3 min

Install Admaxxer on Paddle

Paste a Paddle API key + register a webhook.

Paddle Billing is a merchant-of-record platform. Admaxxer reads revenue from the transaction.completed webhook; the API key is used for follow-up lookups and to validate the webhook signature.

Steps

  1. 1 Create an API key

    Paddle Dashboard → Developer tools → Authentication → + New API key. Name it "Admaxxer — read-only". Copy the key.

  2. 2 Paste into Admaxxer

    Open /integrations, pick Paddle, and paste the API key.

  3. 3 Register the webhook

    Paddle Dashboard → Developer tools → Notifications → + New destination. URL: https://cdn.admaxxer.com/api/pixel/webhooks/paddle/:website_id. Events: transaction.completed.

  4. 4 Verify

    Trigger a test transaction in Paddle sandbox mode. Revenue should land in Admaxxer within 30 seconds.

Verify installation

Troubleshooting

Signature verification fails.
Paddle uses Paddle-Signature header with ts:h1=... format. Make sure you pasted the correct webhook secret (shown once after creating the destination).

Related install guides

Stripe · Lemon Squeezy · Polar · All platforms