Feature Requests

In v1 of the Swap API, the estimatedPriceImpact parameter was a helpful metric for understanding potential slippage and trade execution risk. However, this parameter appears to be missing in v2. This impacts our ability to communicate trade quality to users and to implement safeguards for high-impact trades. Adding estimatedPriceImpact to v2 would provide integrators with a consistent and critical metric for UX, risk management, and transparency — especially in volatile or low-liquidity markets. We would appreciate this parameter being reintroduced in v2.

I’d like to request the addition of the Linea chain (59144) to the list of supported networks for the 0x Gasless API

I’d like to request the addition of the Sonic chain (formerly Fantom, chain ID 250) to the list of supported networks for the 0x Swap API. Sonic is an EVM-compatible Layer-1 blockchain that recently rebranded from Fantom, offering high performance (10,000+ TPS) and sub-second finality, making it a growing hub for DeFi activity.

Hello. I am the creator of nullfinance.com using 0x protocol. I would like to request you to add a new mainnet. The mainnet name is hela chain and the main ID is 8668. (Testnet ID is 666888.) https://docs.helalabs.com/build-on-us/hela-network-information Thank you.

I would like to request the addition of support for the Canto blockchain in the 0x Swap and Price API. Canto is a permissionless, general-purpose blockchain running the EVM. It was specifically designed to fulfil the promise of decentralized finance (DeFi) by creating new systems that are accessible, transparent, decentralized, and free. Key Features: Uniswap V2 DEX: Canto has a robust DEX built on the Uniswap V2 protocol, which is widely recognised and trusted in the DeFi community. Solidly for Stable Pairs: For stable pairs, Canto integrates Solidly, providing efficient and reliable trading mechanisms for stable assets. Ambient Pools: The Canto ecosystem also supports ambient pools, further enhancing liquidity and trading efficiency across various asset pairs.

PulseChain is a system state fork of Ethereum with a community of over 250k+ users, 170+ content creators, and 72 YouTube streams. The founder recently defeated the SEC in court and MatchaXYZ recently relisted his token HEX (Ethereum) on MatchXYZ. Since it was a system state fork, all existing tokens and contracts on Ethereum at the time of the fork (April 1, 2023) are also on PulseChain with the same Contract Address. That means all of MatchXYZ's DeFi contracts (and 0x API contracts) should already exist on PulseChain with the same address as Ethereum (no deployment necessary). All that needs to occur is for sites/api to connect to the same contracts on PulseChain. Please consider supporting our ecosystem, as we have a lot of community members that are a fan of MatchaXYZ's DEX. The primary tokens in the ecosystem are: PLS (gas token - wrapped: 0xA1077a294dDE1B09bB078844df40758a5D0f9a27) PLSX (primary DEX token: 0x95B303987A60C71504D99Aa1b13B4DA07b0790ab) INC (primary DEX incentive token: 0x2fa878Ab3F87CC1C9737Fc071108F904c0B0C95d) HEX (forked version of the HEX you relisted on Ethereum: 0x2b591e99afE9f32eAA6214f7B7629768c40Eeb39) Here are some other resources if you need: www.pulsechain.com (Chain's Website) www.pulsex.com (Primary DEX) bridge.pulsechain.com (Primary ETH-PLS bridge) scan.pulsechain.com (Primary Block Explorer) docs.piteas.io (Best Community On-Chain Aggregrator if needed) gopulse.com (Stats and other) Please feel free to reach out if you have any questions. I am a community dev that likes to build apps on PulseChain. Thank you so much! Dev Juyoung X: @DevJuyoung

I’d like to request the addition of the Sonic chain (formerly Fantom, chain ID 250) to the list of supported networks for the 0x Swap API. Sonic is an EVM-compatible Layer-1 blockchain that recently rebranded from Fantom, offering high performance (10,000+ TPS) and sub-second finality, making it a growing hub for DeFi activity.

I think adding an endpoint that would help us debug failed requests based on the ZID will be a good idea. It will allow users to get more insights on why a trade failed, without needing to contact your team for every failed request.

Takers could add logic around their 0x orders by depositing liquidity into an ERC-1271 smart contract and allowing Tx Relay to fill their orders through the contract once Tx Relay is able to satisfy the logic.