Change Log

2026-09-30

DeFi API — Multi-Chain EVM Expansion

Expanded DeFi API coverage from BSC only to 10 EVM chains: BNB Smart Chain, Ethereum, Base, Arbitrum One, Polygon, Optimism, Avalanche C-Chain, Robinhood, Katana, and ARC. See Supported Chains & Protocols for the full chain and protocol matrix.
Renumbered the data-query error code 40470 to 40490 (same semantics). Update any branching on the old code.

DeFi API — Data & Transaction

Released 5 DeFi Data endpoints under POST /api/v1/defi/data/*: position/list (query DeFi positions across chains), protocol/list, protocol/detail, investment/list, investment/detail. Position data covers in-house parsed protocols only — see Supported Chains & Protocols.
Released 6 transaction-building endpoints under POST /api/v1/defi/transaction/*: deposit, redeem, lp-add, lp-add/calculate, lp-remove, claim. Each returns an ordered dataList of unsigned calldata (APPROVE first when needed, then the main action) for the caller to sign and broadcast, and supports simulate=true to also return a preview.
Added the DeFi Data and DeFi Transaction API catalog groups.
Added the DeFi integration flow guide covering discover → build → simulate → sign → broadcast → poll across the DeFi, Transaction, and Wallet APIs.
Added the Supported Chains & Protocols page listing the phase-1 BSC protocols.

B402 Payments — On-Chain Payment Capability

Launched B402 Payments support based on the x402 protocol, providing developers with stablecoin payment verification and settlement capabilities on BNB Smart Chain.
Developers can apply for B402 permissions and create API Keys on the Web3 Developer Portal, and integrate on-chain payments via the /supported, /verify, and /settle APIs.

API Key — Capability-Domain Permission Binding

API Keys now support binding permissions by business capability domain (e.g. Trading, Market, Wallet, Transaction, DeFi, B402), enabling access control at the capability-domain granularity; select the required domains when creating or editing an API Key.

Transaction API — Latest Block Height

Added GET /api/v1/dex/pre-transaction/block-height to return the latest block height (or Solana slot) synced by the Binance Web3 node for a specified chain.
Use the endpoint to monitor node sync progress and detect when the node lags behind the canonical chain head for risk control.

Trading API — Custom Fee & Revenue Sharing

Launched the on-chain atomic custom-fee (Add Fee / referral fee / revenue-share) feature for the Trading API, supporting both EVM chains (feePercent in (0, 5]) and Solana (feePercent in (0, 10]), with a max of 2 decimal places.
Fee can be deducted from the sell token (FROM_TOKEN) or the buy-token output (TO_TOKEN), sent atomically to a referrer wallet address you designate.
Available on /quote, /swap, /quote-and-swap, and /swap-instruction; response echoes feeAmount, feeToken, and actualSwapAmount when the fee is enabled.

v1.0.0 — Initial Release

Last modified on October 8, 2026