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HTTPay Bridge Rates API
x402
HTTPay Bridge Rates API is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Compares cross-chain bridge rates, fees, and speeds across major Base bridges (LI.FI, Stargate, Across, Hop) for a given currency pair and amount
Price / call$0.01
Success—
StatusUnknown
How this service works
Compare bridge rates, fees, and speeds across major Base bridges (LI.FI, Stargate, Across, Hop, etc.)
Output
A JSON object listing available bridge providers (LI.FI, Stargate, Across, Hop, etc.) with their respective rates, fees, and estimated transfer speeds for the specified currency pair and amount on Base.
Example use cases
Example prompt
“Compare bridge rates and fees for sending 500 USDC from Base to Ethereum mainnet — show me the cheapest and fastest options across all major bridges.”
Technical details
Endpoint
POSThttps://httpay.xyz/api/bridge-ratesWhen to prefer
Use this endpoint when you need to compare multiple bridge providers simultaneously for Base-ecosystem token transfers, especially when optimizing for cost or speed. Ideal for DeFi agents that need to route bridge transactions intelligently without managing individual bridge integrations. Pay-per-call model at $0.01 USDC means no subscription overhead.
Side effects
- Unsupported currency pair returns empty or error response
- Invalid amount format causes 400-level error
- Bridge provider APIs temporarily unavailable may return incomplete rate data
- Payment of 0.01 USDC via x402 not sent returns 402 Payment Required
- Unsupported chain or token combination returns no results
Input
{
"amount": "100",
"baseCurrency": "USDC",
"quoteCurrency": "ETH"
}Output
{
"meta": {
"x402": true,
"poweredBy": "Alfred Zhang 🫡"
},
"tips": [
"For small amounts (<$500): Stargate or Across are fastest and cheapest",
"For large amounts (>$10K): Use official Base bridge or get multiple quotes",
"For withdrawals from Base: Official bridge = most secure, but 7-day wait",
"Always check slippage before bridging — DEX liquidity varies"
],
"query": {
"to": "base",
"from": "ethereum",
"amount": "100 USDC"
},
"updatedAt": "2026-06-12T04:38:42.916Z",
"dataSource": "LI.FI API + curated bridge directory",
"liveQuotes": [
{
"name": "across (via LI.FI)",
"route": "across",
"slippage": "0.26%",
"toAmount": "99.74 USDC",
"fromAmount": "100 USDC",
"gasCostUSD": "$0.11",
"totalCostUSD": "$0.37",
"protocolFeeUSD": "$0.26",
"estimatedTimeDisplay": "~1 min",
"estimatedTimeSeconds": 2
}
],
"recommendation": "Best live quote: across (via LI.FI) at $0.37 total cost, ~1 min",
"bridgeDirectory": [
{
"url": "https://bridge.base.org",
"name": "Base Official Bridge (Superchain)",
"note": "Withdrawals to L1 require 7-day challenge period for security",
"type": "Official OP Stack",
"fromBaseToEth": {
"fee": "~$1-3 gas",
"time": "7 days (challenge period)",
"security": "Canonical"
},
"fromEthToBase": {
"fee": "~$1-3 gas",
"time": "~1-5 min",
"security": "Canonical (most secure)"
}
},
{
"fee": "~0.1% + LayerZero messaging fee",
"url": "https://stargate.finance",
"name": "Stargate Finance",
"time": "~1-3 min",
"type": "LayerZero-powered",
"security": "High (LayerZero DVN verification)",
"supportsTokens": [
"USDC",
"USDT",
"ETH"
]
},
{
"fee": "~0.04-0.1% + gas",
"url": "https://across.to",
"name": "Across Protocol",
"time": "~1-2 min (instant with LP)",
"type": "Optimistic rollup bridge",
"security": "High (UMA oracle verification)",
"supportsTokens": [
"USDC",
"ETH",
"WBTC",
"DAI"
]
},
{
"fee": "~0.1-0.2% AMM fee",
"url": "https://hop.exchange",
"name": "Hop Protocol",
"time": "~2-5 min",
"type": "AMM bridge",
"security": "Medium (Bonder system)",
"supportsTokens": [
"USDC",
"ETH",
"DAI",
"MATIC"
]
},
{
"fee": "~0.05-0.2%",
"url": "https://synapseprotocol.com",
"name": "Synapse Protocol",
"time": "~1-3 min",
"type": "Cross-chain AMM",
"security": "Medium (validator set)",
"supportsTokens": [
"USDC",
"USDT",
"ETH",
"nUSD"
]
}
]
}Schema · Response
{
"type": "json",
"example": {
"description": "Compare bridge rates, fees, and speeds across major Base bridges (LI.FI, Stargate, Across, Hop, etc.)"
}
}Tags
x402
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