0x Opens Cross-Chain API to All Developers with 12 Bridge Partners on Day One

0x Protocol (a DEX aggregator API that has routed $180 billion in swap volume since 2017) opened its Cross-Chain API to general availability Wednesday. Twelve bridge providers are live from day one, accessible through a single API call.

The partner list includes Circle, Chainlink, USDT0, Relay Protocol, LayerZero, Optimism, Across Protocol, Mayan, Stargate Finance, NEAR Protocol, Gas.zip and Squid Router. The API delivers routes with a median bridge time of 10 seconds and a quote response under 750 milliseconds, per 0x’s product page. The company reports 99.97% uptime on the underlying infrastructure.

For developers, the pitch is consolidation. A wallet or app already on 0x’s Swap API can activate cross-chain routing without adding vendors or writing bridge-specific error handling. 0x monitors routes in real time and switches providers when one degrades.

The Competitive Framing

Cross-chain swaps are a contested market. 1inch launched its Fusion+ cross-chain order-flow product in 2024. LayerZero, Wormhole and Across each run native bridging stacks with direct developer APIs. Those protocols generally require the developer to choose and maintain a specific bridge. 0x is positioning its API as the layer that removes that decision.

Across Protocol, which uses an optimistic oracle to underwrite fast bridge fills, processed more than $15 billion in bridge volume in 2025. LayerZero powers OFT-standard token transfers; Stargate is its primary consumer-facing application. Both protocols are now listed as partners in the 0x Cross-Chain API — meaning 0x is aggregating competitors rather than replacing them outright.

From Private Beta to GA

The Cross-Chain API entered private beta on February 25, 2026, with a subset of bridge partners. Wednesday’s announcement removes the invite gate and expands the partner set to 12. 0x has powered swap infrastructure for Coinbase Developer Platform, MetaMask, Phantom, Robinhood Wallet and Trust Wallet, according to the company’s blog. Cumulative swap volume has crossed $180 billion across 211 million transactions since 2017.

The company has not disclosed how many private beta customers went live with cross-chain routing, or what aggregate volume the beta produced. That data would be the clearest measure of whether the 12-partner launch converts into real transaction flow.

Token Disconnect

$ZRX, the governance and fee token for 0x Protocol, trades at $0.0934, a market cap of roughly $79 million at rank #322, per CoinGecko. The token is down about 5% on the day and 96% from its January 2018 all-time high of $2.50.

The Cross-Chain API does not route fees on-chain through $ZRX under 0x’s current model; the company charges integrators at the API level. That structure means the GA launch does not directly affect $ZRX tokenomics, even as it expands 0x’s addressable developer market.