Feature Requests

Hello 0x team, We request Swap API / Price API support for chainId 138 — DeFi Oracle Meta Mainnet , an EVM-compatible QBFT network operated by DBIS / DeFi Oracle Meta. ### Chain information | Field | Value | |-------|--------| | Chain ID | 138 (0x8a) | | Network name | DeFi Oracle Meta Mainnet | | Consensus | QBFT | | Finality | ~1 block | | Block time | ~2 seconds | | Native currency | ETH (18 decimals) | | Public RPC (HTTPS) | https://rpc-http-pub.d-bis.org | | Alternate RPC | https://rpc-http-prv.d-bis.org · https://rpc.public-0138.defi-oracle.io | | WebSocket | wss:// rpc-ws-pub.d-bis.org | | Block explorer | https://explorer.d-bis.org | | Chainlist | https://chainlist.org/chain/138 | | Documentation | https://github.com/Defi-Oracle-Tooling/smom-dbis-138 | ### Live on-chain liquidity (production, official upstream deploys) DODO V2 (PMM — primary hub venue) DODOV2Proxy02: 0xEF6E6F41A522896a9EE1C580C87C05E409193F8d DVMFactory: 0xc93870594C7f83A0aE076c2e30b494Efc526b68E DODOPMMIntegration (live traded pools): 0x86ADA6Ef91A3B450F89f2b751e93B1b7A3218895 Funded PMM pools include cUSDT/cUSDC, cBTC pairs, WETH/USDC, WETH/USDT (8 live pools) Uniswap V2 (native) Factory: 0x0C30F6e67Ab3667fCc2f5CEA8e274ef1FB920279 Router02: 0x3019A7fDc76ba7F64F18d78e66842760037ee638 Uniswap V3 (native) Factory: 0x2f7219276e3ce367dB9ec74C1196a8ecEe67841C SwapRouter02: 0xde9cD8ee2811E6E64a41D5F68Be315d33995975E Multicall3: 0xcA11bde05977b3631167028862bE2a173976CA11 ### Primary hub tokens (Chain 138) cUSDC: 0xf22258f57794CC8E06237084b353Ab30fFfa640b (6 decimals) cUSDT: 0x93E66202A11B1772E55407B32B44e5Cd8eda7f22 (6 decimals) cUSDC_V2 (ERC-3009): 0x219522c60e83dEe01FC5b0329d6fA8fD84b9D13d cUSDT_V2 (ERC-3009): 0x9FBfab33882Efe0038DAa608185718b772EE5660 cBTC: 0xe94260c555ac1d9d3cc9e1632883452ebdf0082e (8 decimals) ### Use case We operate a live x402 paid API at https://x402.d-bis.org . Agent flows prefund via swap/bridge before HTTP 402 settlement: Today: 0x quotes work on Base (8453), Polygon (137), Ethereum (1), etc. Chain 138 hub swaps currently fall back to DODO PMM only: https://x402.d-bis.org/api/x402/preflight/dodo-138 Goal: enable chainId=138 on 0x Swap API so agents can route hub liquidity through 0x aggregation (DODO + UniV2/V3) before paying on 138. Our preflight endpoint (0x, other chains): https://x402.d-bis.org/api/x402/preflight/0x ### Integration readiness Public RPC and explorer are stable and verified. Official protocol contracts deployed from upstream repos (DODO, Uniswap) — not custom pilot routers. CCIP bridge infrastructure exists for cross-chain settlement with Ethereum mainnet. We can provide test API keys, operator contact, and liquidity/volume estimates on request. ### Contact Organization: DBIS / DeFi Oracle Meta Domains: d-bis.org · defi-oracle.io Email: submissions@d-bis.org Thank you for considering Chain 138.

Transfer enables

Payment pay, payouts

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

Hi 0x Team, with the v2 API release, the estimatedPriceImpact field was removed from the quote and related endpoints, which previously allowed developers to easily show users how much a trade deviates from the market price and implement slippage or warning logic. Without it, we must now manually compute price impact using external market data, which adds unnecessary complexity and reduces accuracy. Please consider reintroducing this field (or an equivalent) in v2 to restore this crucial functionality for both UX transparency and automated trade validation.

Degen chain is an L3 on Base that is gaining traction due to very very low fees. Can you consider adding support for it in the Price & Swap API?

Ability to request quotes for multiple swaps in a single batch.

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