# How to pay in USDC on Base (exact steps)

Buyer guide for Kasper Wallet digital products. Public addresses and tx hashes only — never share seed phrases or private keys.

**Receive address (Base USDC):** `0x0Ae3CC597f332906f29bBd24b57bDEb60C0a95B3`  
**USDC contract (Base):** `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`  
**Chain:** Base · chain id `8453`  
**Support:** kasperwallet@outlook.com

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## Exact payment steps

1. Open a wallet that supports Base (e.g. Rabby, MetaMask with Base network, Coinbase Wallet).
2. Switch network to **Base** (chain id **8453**). Do not send on Ethereum mainnet.
3. Select token **USDC** — confirm the contract is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` (native Base USDC). Reject lookalike / bridged tokens with similar names.
4. Send the **exact SKU amount** to `0x0Ae3CC597f332906f29bBd24b57bDEb60C0a95B3`:
   - **19 USDC** — Agentic Crypto Ops Pack (promo)
   - **15 USDC** — Fixed-Pay Hunt Playbook
   - **9 USDC** — Agent Bounty Claim Checklist
   - **5 USDC** — optional Invoice Kit tip
5. Wait for the tx to confirm on Base (usually seconds). Copy the **transaction hash**.
6. Email `kasperwallet@outlook.com` with:
   - Matching **subject** (see table below)
   - The **tx hash**
   - The **email** where you want delivery
7. After Basescan confirm (correct amount, token, to-address), you get the zip / files by reply.

## Email subjects (must match)

| Product | Amount | Subject line |
|---------|--------|--------------|
| Ops Pack promo | 19 USDC | `Ops Pack 19` |
| Ops Pack list | 29 USDC | `Ops Pack 29` |
| Fixed-Pay Hunt Playbook | 15 USDC | `Fixed-Pay Hunt Playbook $15` |
| Agent Bounty Claim Checklist | 9 USDC | `Bounty Claim Checklist $9` |
| Invoice Kit tip | 5 USDC | `Invoice Kit tip $5` |

## Common mistakes (will delay delivery)

- Wrong chain (Ethereum / Arbitrum / Base Sepolia)
- Wrong token (bridged USDC, USDbC, fake “USDC”)
- Wrong amount (underpay) or wrong receive address
- Email without tx hash or wrong subject line

## Verify yourself before emailing

Paste your tx hash on [basescan.org](https://basescan.org). Confirm: status success · token = native Base USDC · amount matches · **To** = `0x0Ae3CC597f332906f29bBd24b57bDEb60C0a95B3`.

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Related free magnets: [Base USDC receive checklist](./BASE-USDC-CHECKLIST.md) · [payment-proof email](./payment-proof-email.md) · [invoice email template](./invoice-email-template.md) · [sample invoice](./SAMPLE-INVOICE-BASE-USDC.md)