# x402 Trading Hub – Bridge Swap Rate > x402 Trading Hub – Bridge Swap Rate is a paid API for AI agents from trading-hub-v4-omega.vercel.app, paid per call via x402, $0.18/call, status unknown (last checked 2026-11-05). Returns the current exchange rate for a cross-chain bridge swap between two tokens or assets ## Facts - Endpoint: POST https://trading-hub-v4-omega.vercel.app/api/bridge/swap-rate?utm_source=zero.xyz - Price: $0.18/call - Payment: x402 - Status: unknown - Last checked: 2026-11-05 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/x402-trading-hub-bridge-swap-rate-8a925e93 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wBMPcCevTa8v_AC9fliQw Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability x402-trading-hub-bridge-swap-rate-8a925e93 -d '' ``` Example prompt: What's the current bridge swap rate to convert 2 ETH on Ethereum to USDC on Arbitrum — including fees and estimated output? ## When to prefer this Use this endpoint when you need a real-time bridge swap rate quote for cross-chain token transfers, especially when comparing DeFi bridge costs, planning on-chain treasury moves, or evaluating arbitrage opportunities across blockchains. Prefer this over generic forex or spot price endpoints when the specific context is cross-chain bridging with protocol fees and slippage included. ## Known failure modes - Unsupported token pair or chain combination returns an error or empty rate - Invalid or zero swap amount causes a validation error - Network congestion or bridge protocol downtime may return stale or unavailable rates - Missing required fields (source/destination token or chain) returns a 400-level error - Rate may be momentarily stale if liquidity pools are updating ## How this service works 67 paid endpoints for on-chain, forex, stocks & market intelligence ## Output Returns the current bridge swap rate between two specified tokens across chains, including the effective exchange rate, estimated output amount, bridge and protocol fees, and slippage information for the requested swap pair and amount. ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-trading-hub-bridge-swap-rate-8a925e93/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from trading-hub-v4-omega.vercel.app](https://www.zero.xyz/host/trading-hub-v4-omega.vercel.app/llms.txt)