IOU tokens are ATXP's internal credit unit. One IOU token equals one USD. They're called IOU tokens because they represent a credit against ATXP's infrastructure costs — not a stablecoin or on-chain asset. Your balance in IOU tokens is what gets drawn down as your agents make API calls and run tasks.

How to Add Funds to Your ATXP Account

Your agent hit a zero balance at 2am and stopped mid-task. Or you’re setting up a new account and need to get funds in before you can run anything. Either way, funding an ATXP account takes about 90 seconds once you know where to go.

Quick answer: Go to accounts.atxp.ai. Sign in, enter an amount on the Fund page, and complete the Stripe checkout. Your balance appears as IOU tokens immediately and is available to all ATXP products — chat, music, pics, or any agent using your credentials. For production use, enable auto top-up so your agents never run out mid-task.

Step 1 — Go to accounts.atxp.ai

All ATXP balance management happens at accounts.atxp.ai. This is the central account for all ATXP products — the same balance covers agent API calls, ATXP Chat usage, and any other product tied to your account.

Sign in with the same method you used when you created your account. If you authenticated with email, use email. If you used Google or a wallet, use the same. Privy handles authentication across all ATXP properties, so the identity has to match.

Step 2 — Enter an amount and pay

The Fund page shows your current balance and a payment form. Enter a dollar amount and complete the Stripe checkout. Cards accepted: Visa, Mastercard, Amex, Discover. If you’re working in a crypto-native environment, USDC deposits on Base and Solana are also supported — contact support for the deposit address.

The minimum useful amount depends on what you’re doing:

Testing / exploration: $5–$10 covers hundreds of tasks at typical usage
Light production use: $20–$50 with auto top-up enabled
Scheduled agents running overnight: Fund based on your task volume estimate, then set auto top-up with a comfortable threshold

After payment, Stripe redirects you back to accounts.atxp.ai and your balance updates immediately. There’s no delay — funds are available the moment the checkout completes.

What You’re Actually Paying For

Your ATXP balance is denominated in IOU tokens. One IOU token equals one USD. They’re credited to your account and drawn down as your agents make API calls, run tasks, or use ATXP infrastructure.

IOU tokens are not a stablecoin or on-chain asset — they’re a credit balance. They don’t expire. If you add $50 and use $12, you have $38 in IOU tokens until you use them.

The balance covers:

API calls made by agents using your ATXP credentials
ATXP Chat usage (if you’re using that product)
Any ATXP product that authenticates against your account

Per-task budget limits and spending caps, if you’ve configured them, are enforced on top of your balance — a task can be capped at $0.50 even if you have $100 in your account. Balance and per-task budgets are independent controls.

ATXP credits your balance immediately on payment. Auto top-up, spending limits, and per-task budget configuration are all available from the same accounts.atxp.ai dashboard. Go to accounts.atxp.ai

Step 3 — Enable Auto Top-Up for Production Use

If you have agents running on a schedule or expect continuous usage, enable auto top-up. A zero balance stops agents immediately — there’s no grace period, no warning, just a failed task.

Auto top-up works by monitoring your balance and triggering a card charge when you fall below a threshold you set.

How to configure it:

On the Fund page at accounts.atxp.ai, scroll to the Auto Top-Up section
Set a threshold — the balance level that triggers a reload
Set a top-up amount — how much to add when the threshold is hit
Save a payment method if you haven’t already

Threshold guidance: Set the threshold at 2x your typical daily spend. If your agents use ~$3/day, set the threshold at $6. That gives you a day of buffer before the reload triggers, which is enough margin if there’s ever a card issue.

The top-up amount should cover at least 3–5 days of usage so you’re not triggering reloads constantly.

Troubleshooting

Balance added but agents still stopping: Check whether a per-task budget or spending limit is configured. Per-task budgets cap individual task costs independently of your account balance. A $0.50 per-task cap will stop a task that would otherwise cost $2, regardless of how much is in your account.

Payment declined: ATXP uses Stripe for card processing. Declines usually come from the card issuer, not ATXP — try a different card, or check whether your bank is blocking the transaction. International cards sometimes require explicit authorization for online payments.

Balance shows $0 after a crypto deposit: USDC deposits require a few block confirmations before they credit. This typically takes 2–5 minutes on Base. Solana confirmations are faster. If your balance hasn’t updated after 10 minutes, contact support with your transaction hash.

Charged but no balance: This is rare but happens if there’s a webhook delivery issue. Contact support with your Stripe receipt — the transaction reference lets the team manually verify and credit your account.

FAQ

Where do I add funds to my ATXP account?

Go to accounts.atxp.ai. Sign in, enter an amount on the Fund page, and complete Stripe checkout. Balance appears immediately as IOU tokens.

What payment methods does ATXP accept?

Credit and debit cards via Stripe — Visa, Mastercard, Amex, Discover. USDC on Base and Solana for crypto-native workflows.

What are IOU tokens?

IOU tokens are ATXP’s internal credit unit. One IOU token equals one USD. They’re drawn down as agents make API calls and run tasks. Not a stablecoin — a credit balance.

What is auto top-up and should I enable it?

Auto top-up reloads your balance when it falls below a threshold you set. If you’re running agents in production, enable it. A zero balance stops agents with no warning. Set the threshold at 2x daily spend.

How much should I add to start?

$10 covers light testing. For production agents or overnight scheduled tasks, estimate your monthly task volume, fund accordingly, and enable auto top-up.

Can I get a refund on unused balance?

ATXP balance is non-refundable. Funds don’t expire — unused balance carries forward indefinitely.

Why is my agent stopping mid-task?

Most likely a zero balance. Check accounts.atxp.ai. If balance is positive, check whether a per-task budget limit is configured — spending limits are enforced independently of account balance.