0x’s current Standard transaction fee is 0.15%, with scope that varies by API. Budget it separately from network costs, your application’s fee and any commercial account charge.
The official pricing page, checked September 24, 2026, states:
| Product | Standard transaction charge |
|---|---|
| Swap API | 0.15% on selected token pairs |
| Cross-Chain API | 0.15% on cross-chain transactions |
| Gasless API | 0.15% plus gas execution cost |
The eligible token set can change. The API FAQ identifies zeroExFee as the quote-level evidence when the provider fee applies. A general rate does not mean every ordinary Swap pair is charged.
Account price and capacity
The public page lists Standard at 5 requests per second. Its retrieved cards display $1,000 for Standard and $2,500 for Enterprise alongside monthly/yearly controls and free-account language, but do not reliably associate those dollar figures with a billing interval in the retrieved text. They are displayed prices, not a verified monthly invoice quotation. Confirm the selected plan, interval and payable amount in the dashboard or written offer before purchasing.
This distinction also matters when reading rate-limit documentation that describes free access. Account creation, development access and a production commercial agreement need not have identical conditions.
Other transaction economics
The pricing page says Standard collects trade surplus: favorable execution beyond the initial quote can accrue to 0x. Custom agreements can change commercial arrangements. Do not assume the user or integrating application receives all price improvement.
Your application can also charge an integrator fee. That is separate from the provider’s charge, and should be explained without adding either fee twice to an already net output.
Describe the workload before committing
0x says its APIs are optimized for trading and that consistently requesting quotes without submitting trades can encounter Standard limits. A price-comparison service and a wallet with comparable request volume can therefore require different discussions.
Ask for confirmation of capacity, quote-only use, RFQ access, surplus treatment and support. A hypothetical $100,000 of fee-bearing volume at 0.15% creates $150 of provider transaction fees, before gas and other terms; API request count alone cannot predict that amount.
Sources & verification (4)
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- 0x Pricing
Standard fees are 0.15% on selected Swap pairs, 0.15% for Cross-Chain, and 0.15% plus gas for Gasless. The page lists 5 requests per second and surplus collection. Displayed account prices require billing-interval confirmation; quote-only workloads have separate conditions.
https://0x.org/pricing - FAQ
Standard-tier token-dependent zeroExFee; Gasless eligibility and cost treatment; product support conditions.
https://docs.0x.org/docs/introduction/faq - Rate Limits
The documented free-tier limit is approximately 5 requests per second across endpoints, enforced in fixed one-second windows.
https://docs.0x.org/docs/developer-resources/rate-limits - Monetize Your App on EVM
Affiliate fees across plans; custom-plan trade-surplus arrangements.
https://docs.0x.org/evm/0x-swap-api/guides/monetize-your-app-using-swap