# 0x Knowledge Base


## Getting Started

- [How to get started with 0x API](https://help.0x.org/articles/4704859362-how-to-get-started-with-0x-api)
- [0x Community Resources](https://help.0x.org/articles/8061784403-0x-community-resources)
- [What can I find in the 0x Knowledge Base?](https://help.0x.org/articles/8812042558-what-can-i-find-in-the-0x-help-center)
- [Where to Find 0x Documentation](https://help.0x.org/articles/5828157813-where-to-find-0x-documentation)
- [What APIs does 0x offer?](https://help.0x.org/articles/1923630771-what-apis-does-0x-offer)

### Contact us

- [How to submit a 0x feature request](https://help.0x.org/articles/6482251154-how-to-submit-a-0x-feature-request)
- [How to get in touch with the 0x sales team](https://help.0x.org/articles/8026670762-how-to-get-in-touch-with-the-0x-sales-team)
- [How to apply as a liquidity source in the 0x ecosystem](https://help.0x.org/articles/1372099017-how-to-apply-as-a-liquidity-source-in-the-0x-ecosystem)
- [How to get developer support from the 0x team](https://help.0x.org/articles/6965690915-how-to-get-developer-support-from-the-0x-team)

## FAQ

- [Upgrading to 0x API v2](https://help.0x.org/articles/9175390481-upgrading-to-0x-api-v2)
- [What are custom Uniswap v4 hooks?](https://help.0x.org/articles/5464457320-what-are-custom-uniswap-v4-hooks)
- [xStocks and Robinhood RWA support on 0x](https://help.0x.org/articles/5420296643-xstocks-support-on-0x)

## Troubleshooting Guides

- [0x API Troubleshooting FAQ](https://help.0x.org/articles/7727912833-0x-api-troubleshooting-faq)
- [0x Error Codes](https://help.0x.org/articles/6071212523-0x-error-codes)
- [How to get support for 0x protocol, 0x governance, or ZRX staking questions](https://help.0x.org/articles/3953981845-how-to-get-support-for-0x-protocol-0x-governance-or-zrx-staking-questions)

## Security Tips

- [Reset your 0x Dashboard Password](https://help.0x.org/articles/8721547603-reset-your-0x-org-password)
- [0x Security: Audits, Smart Contract Safety, and the Bug Bounty Program](https://help.0x.org/articles/7529503537-0x-security-audits-smart-contract-safety-and-the-bug-bounty-program)

## Integration Best Practices

- [How to return the 0x swap fees to your end-users](https://help.0x.org/articles/5856315958-how-to-return-the-0x-swap-fee-to-your-end-users)
- [How to find the 0x API (Swap & Cross-Chain) liquidity sources for each chain](https://help.0x.org/articles/5642448716-how-to-find-the-0x-swap-api-liquidity-sources-for-each-chain)
- [How to check which tokens you can swap through 0x API](https://help.0x.org/articles/6507997832-how-to-query-which-tokens-are-available-to-be-swapped-through-0x-api)
- [Rate Limits](https://help.0x.org/articles/9391588008-rate-limits)
- [Understanding 0x RFQ (Request for Quote)](https://help.0x.org/articles/3310442497-understanding-0x-rfq-request-for-quote)
- [How to monetize your app with 0x Swap API](https://help.0x.org/articles/4165900987-how-to-monetize-your-app-with-0x-swap-api)
- [Does 0x support testnets?](https://help.0x.org/articles/6722655458-does-0x-support-testnets)
- [Using AI with 0x: an overview](https://help.0x.org/articles/6277757265-using-ai-with-0x-an-overview)
- [Slippage, price impact, and prices: what integrators need to know](https://help.0x.org/articles/3626232596-slippage-price-impact-and-prices-what-integrators-need-to-know)
- [What blockchains does 0x support?](https://help.0x.org/articles/7644024795-what-blockchains-does-0x-api-support)

## Dashboard

- [How do I add a user to my Account?](https://help.0x.org/articles/2834001442-how-do-i-add-a-user-to-my-account)
- [How do I find my API key in the 0x Dashboard?](https://help.0x.org/articles/3575794340-how-do-i-find-my-api-key-in-the-0x-dashboard)

## Subscriptions

- [Account Tiers and How to Upgrade](https://help.0x.org/articles/9306321749-account-tiers-and-how-to-upgrade)

### Make changes to your plan

- [How to downgrade your 0x API plan](https://help.0x.org/articles/9377259942-how-to-downgrade-your-0x-api-plan)
- [0x Fulfillment Policy](https://help.0x.org/articles/5532272983-0x-fulfillment-policy)
- [How to cancel your 0x API plan](https://help.0x.org/articles/4710819898-how-to-cancel-your-0x-api-plan)

## Source Default Category