# X402Node Cross-Chain Bridge Quote

> X402Node Cross-Chain Bridge Quote is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-11).

Returns the best bridge route, expected received amount, fees, gas costs, and estimated duration to transfer a token between EVM chains, aggregated across bridges via LI.FI.

## Facts

- Endpoint: GET https://api.x402node.dev/defi/bridge-quote?utm_source=zero.xyz
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402node-cross-chain-bridge-quote-596d2627
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6o1c4Y3dEE-YtqgbJCfLv

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 x402node-cross-chain-bridge-quote-596d2627
```

Example prompt: What's the best bridge route and total cost to move 500 USDC from Ethereum mainnet to Arbitrum One right now — include fees, expected received amount, and how long it'll take?

## When to prefer this

Use this endpoint when an agent needs to compare bridging costs and routes across multiple bridge providers without integrating each bridge's SDK directly. Ideal for pre-flight cost estimation before executing a cross-chain transfer, or for surfacing the cheapest/fastest bridging option to a user in a DeFi workflow.

## Known failure modes

- Unsupported chain pair returns an error or empty route
- Token not supported on one or both chains returns no quote
- Amount too small to cover fees returns an error or zero received amount
- LI.FI aggregator temporarily unavailable causes 502 or timeout
- Invalid token address returns a validation error

## How this service works

Cross-chain bridge quote: best route, expected received amount, fees, gas and duration to move a token between EVM chains, aggregated across bridges via LI.FI. Lets an agent compare bridging cost and time without integrating a router. Live aggregated. bridge quote, cross chain transfer cost, best bridge route, lifi Accepts payment on Base or Solana — either network works.

## Output

Returns the optimal bridge route including the bridge provider name, expected received token amount after fees, itemized bridging and gas fees in USD, estimated transfer duration in minutes, and source/destination chain details.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "amount": {
       "type": "string",
       "description": "human amount, default 1000"
      },
      "toChain": {
       "type": "string",
       "description": "target chain (default arbitrum)"
      },
      "toToken": {
       "type": "string",
       "description": "symbol e.g. USDC (default USDC)"
      },
      "fromChain": {
       "type": "string",
       "description": "ethereum/base/arbitrum/optimism/polygon/bsc (default ethereum)"
      },
      "fromToken": {
       "type": "string",
       "description": "symbol e.g. USDC (default USDC)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402node-cross-chain-bridge-quote-596d2627/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)