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PreFlight Bridge Route
x402
PreFlight Bridge Route is a paid API for AI agents from meryol-agenticmarket-x402.hf.space, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Finds the optimal cross-chain bridge route with executable calldata, fee estimates, and ETA for moving tokens between EVM chains before signing
Price / call$0.01
Success—
StatusUnknown
How this service works
Pre-trade & pre-sign checks for autonomous agents: everything an agent verifies BEFORE signing a transaction — token due diligence, calldata red-flag decoding, oracle freshness, holder concentration, bridge routing with executable calldata, cross-venue perp funding, gas and price sanity checks. EVM chains: Ethereum, Base, Arbitrum, Optimism.
Output
Returns the recommended bridge tool (e.g. Across), source and destination chain/token, fee in USD, gas cost in USD, estimated output amount in token units and USD, ordered execution steps, and ETA in seconds for the bridge to complete.
Example use cases
Cheapest bridge for Arbitrum USDC
“Before I move any funds, find me the cheapest bridge route for sending 500 USDC from Arbitrum to Optimism — show me the recommended bridge tool, total fees in USD, expected output, and how long the transfer will take.”
Pre-sign cross-chain ETH transfer check
“I want to bridge 2 ETH from Ethereum to Base but don't want to sign anything yet — can you pull the best route, break down the gas and bridge fees in USD, and tell me the estimated arrival time so I can decide if it's worth it?”
Validate bridge calldata before execution
“I'm about to bridge 10,000 USDC from Ethereum to Arbitrum — before I sign, get me the executable calldata, a full fee breakdown, the expected output amount, and confirm which bridge tool you're recommending so I can review everything first.”
Technical details
Endpoint
POSThttps://meryol-agenticmarket-x402.hf.space/bridge/routeWhen to prefer
Use this endpoint when an autonomous agent needs to verify a cross-chain bridge route and get accurate fee/gas estimates before signing any transaction. Ideal for pre-trade safety checks on EVM chains (Ethereum, Base, Arbitrum, Optimism) where you want executable calldata and cost breakdown without committing funds.
Side effects
- Unsupported chain pair — bridge route not available between specified chains
- Token not supported on destination chain
- Amount too small to cover bridge fees, returning error or zero estimated output
- Bridge liquidity insufficient for requested amount
- Invalid chain identifier provided in request body
- Service temporarily unavailable due to upstream bridge API outage
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"tool": "across",
"notes": [],
"amount": "1000000000",
"fee_usd": 0.2,
"gas_usd": 0.05,
"to_chain": "base",
"to_token": "usdc",
"from_chain": "ethereum",
"from_token": "usdc",
"tool_steps": [
"across"
],
"eta_seconds": 180,
"estimated_out": "999800000",
"estimated_out_usd": 999.8
}
}Tags
x402
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