Billing¶

EpsimoAI uses a token-based billing model. You purchase tokens, and they are consumed as you interact with assistants. Payments are processed securely through Stripe.

How Tokens Work¶

Every time you send a message and receive a response, tokens are consumed. Token usage depends on:

• The length of your message and the assistant's response
• The AI model used (larger models cost more tokens)
• Whether tools are invoked during the run

Your current token balance is visible in the Settings page.

Purchasing Tokens¶

1. Go to Settings in the sidebar.
2. Choose the number of tokens you'd like to purchase (1–100,000).
3. Click Buy Tokens — you'll be redirected to a Stripe checkout page.
4. Complete payment (credit card, supported by Stripe).
5. After successful payment, tokens are credited to your account automatically.

You'll be redirected to a success page after payment. If you cancel, no charge is made.

Pricing¶

Token pricing is configured server-side via Stripe. The unit price is fetched from the Stripe product at checkout time, ensuring you always see the current price.

Currency: EUR

What Happens When Tokens Run Out¶

• You will not be able to create new runs (send messages) until you purchase more tokens.
• Existing threads and conversation history remain accessible.
• Your assistants and configuration are preserved.

Payment Security¶

• All payments are processed by Stripe — EpsimoAI never sees your card details.
• Webhook verification ensures tokens are only credited for legitimate payments.
• Each payment event is processed exactly once (idempotency protection).

API Reference¶

See the full API documentation at /docs#Checkout.

Related Pages¶

• Overview
• Settings & Account