Interoperability for x402

The Interoperability Layer for x402

Enable truly cross-chain micropayments so users and agents can pay with any token, on any chain, while services receive seamlessly where they are.

MicroPay
Base
Arbitrum
Optimism
Ethereum
Polkadot
BSC
Polygon

The Multi‑Chain Payment Problem

Payments are siloed within single chains. Even with x402 enabling agentic micropayments, there is no seamless, trustless way to pay on one chain and settle on another.

Fragmentation

Each chain has its own tokens, liquidity, and tooling, forcing users to stay within one ecosystem.

Manual Workarounds

Developers build custom bridges or use custodial relays to move value across chains — slow, costly, risky.

Stalled Agentic UX

AI agents can initiate payments, but not seamlessly across networks; cross‑chain subscriptions and pay‑per‑use remain clunky.

MicroPay Bridges Every Chain

A non‑custodial, programmable routing layer on top of x402 that handles cross‑chain conversion and settlement.

  • • Pay on Chain A, receive on Chain B — automatically.
  • • Route stablecoin flows across ecosystems without custodial bridges.
  • • Programmable hooks for agents (refunds, metering, usage‑based caps).
  • • Works with x402 flows; we add the cross‑chain plumbing.
  1. Sender (user/agent) attaches payment via x402 on Chain A.
  2. MicroPay Router performs trust‑minimized cross‑chain route.
  3. Service receives on its preferred chain; receipts emitted for audit.

How It Works

Send

Attach an x402 payment from any supported chain or token.

Route

MicroPay selects a path across bridges/routers with on‑chain proofs.

Settle

Funds land on the destination chain; service unlocks resource.

Use Cases

AI agents paying compute & data APIs
Cross‑chain SaaS subscriptions
Pay‑per‑call web services
Usage‑metered dApps
Multi‑chain marketplaces
Programmatic refunds & credits

Ecosystem & Integrations

Designed to work alongside x402 + your favorite chains and bridges.

x402
Polkadot
Hyperbridge
Base
Arbitrum
Optimism
Ethereum
Polygon
Solana
BSC
Avalanche

Build with MicroPay

Join the early builder cohort and help shape the cross‑chain agentic economy.