Cross-Chain API Private Beta

One integration for quoting, bridging, and execution. Sign up for private beta.‍

Cross-chain swaps may be table stakes but the behind-the-scenes reality for most teams is still a patchwork: one provider for quoting, another for bridging, another for execution, plus separate systems for tracking, reconciliation, and support when things go sideways.

Today, we’re opening the private beta of the 0x Cross-Chain API, a new API that unifies routing, bridging, destination execution, and tracking into one integration and one flow, so you can ship cross-chain swaps faster and operate them with less overhead.

Key Takeaways:

• One integration, one flow: unify quoting, bridging, execution, and tracking in a single API
• Real-time route streaming: deliver quotes as soon as routes are found so users see results faster, without sacrificing speed for price
• Reliability by redundancy: multiple providers, continuous evaluation, and fallback routes help reduce failed or “stuck” transfers
• Operational clarity: clearer statuses and tracking reduce ambiguity for users and costs for support teams (tracking surfaces coming soon)
• Built on proven infrastructure: recent observed performance includes 99.974% uptime (last 30 days) and <750ms API response time for producing quotes (swap + bridge)

Plug-and-play multi-chain

Cross-chain swaps have quickly moved from nice-to-have to must-have. For many teams, delivering the support users demand means assembling (and maintaining) a multi-vendor stack, and then explaining to users what happened when a transfer stalls, a route degrades, or the UI can’t confidently report status.

We built 0x Cross-Chain API to make cross-chain swaps feel simple for users while making the underlying system simpler for your team: fewer vendors, fewer edge cases, and fewer ambiguous failures.

To deliver that end-to-end experience, the Cross-Chain API aggregates routes across a set of established bridging options (including native, CCTP, and OFT-based paths), including Circle, LayerZero OFTs, Across, Mayan, Squid, Relay, Stargate, Across, Gas.zip, and native bridges.

What you can build with the Cross-Chain API (and what changes for your team)

Instead of stitching together routing + bridging + execution + status tracking, the Cross-Chain API gives you a single integration that unlocks:

• Faster time to ship cross-chain swaps
• Fewer vendors to manage
• Clearer operations and fewer ambiguous failures
• A more consistent in-app experience

For many products, this is the difference between cross-chain support as a checkbox item and cross-chain as a feature users actually trust.

What the user experience can feel like

Instant routes keep users moving

Routes stream to your interface over WebSocket and populate dynamically as quotes arrive, so you can show options quickly and keep users engaged. This approach reduces integration work (no elaborate timing or refresh strategies) and helps you avoid trading off speed against price by default.

Resilience built in

Reliability comes from redundancy and continuous route evaluation. When one route degrades, the system is designed to keep options available without your team manually maintaining a maze of provider-specific fallbacks.

Clearer outcomes and fewer support tickets

Replace “what happened?” with a clear answer through improved visibility and transaction states, and give users transparent insights into their trade’s status.

Who the private beta is for

This private beta is a fit if you’re:

• An existing 0x customer who wants to add cross-chain swaps without taking on a multi-vendor integration burden
• A wallet, fintech, or consumer app where reliability and clear transaction outcomes directly impact retention and support costs
• A team that needs cross-chain out of the box, with redundancy and operational insights built in

Get early access now

If you’re an existing customer, reach out to your 0x contact to join the private beta. If you’re new to 0x and want to launch cross-chain swaps with one integration, we’d love to talk.

• Request access: Sign up for Cross-Chain API Beta
• Talk to the team: Contact sales