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Cross-Chain Bridge Route API

br0ski777/bridge-routes-x402

Connects Claude to LI.FI's cross-chain bridge aggregator so you can query optimal routes for moving crypto between networks. Exposes operations for finding the cheapest or fastest paths, comparing fees across providers, and estimating bridge times. Runs on x402's pay-per-call model where requests cost USDC, so you're not managing API keys or subscriptions. Reach for this when you're building agents that need to advise on multi-chain transfers or automate bridge route selection. The remote SSE transport means it's hosted and ready to use without running your own infrastructure.

tool
1
transport
SSE
last updated
May 16, 2026
View on GitHub

Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

bridge_find_best_routeUse this when you need to bridge tokens between different blockchains. Returns ranked bridge routes with fees and timing in JSON. 1. routes: array of bridge options ranked by best value 2. bridgeProv5 params

Use this when you need to bridge tokens between different blockchains. Returns ranked bridge routes with fees and timing in JSON. 1. routes: array of bridge options ranked by best value 2. bridgeProv

Parameters* required
amountstring
Amount in smallest unit (e.g. 1000000 for 1 USDC with 6 decimals, 1000000000000000000 for 1 ETH)
fromChainstring
Source chain ID (1=Ethereum, 8453=Base, 42161=Arbitrum, 10=Optimism, 137=Polygon, 56=BSC, 43114=Avalanche)
toChainstring
Destination chain ID (1=Ethereum, 8453=Base, 42161=Arbitrum, 10=Optimism, 137=Polygon, 56=BSC, 43114=Avalanche)
toTokenstring
Destination token symbol if different from source (optional, defaults to same as token)
tokenstring
Token symbol to bridge (e.g. USDC, USDT, ETH, WETH)

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Readme

Cross-Chain Bridge Route API

MCP Server x402 License: MIT

Best cross-chain bridge routes via LI.FI -- 60+ chains, 18+ bridges, fees and time compared. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "bridge-routes": {
      "url": "https://bridge-routes.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl "https://bridge-routes.api.klymax402.com/api/route?fromChain=...&toChain=...&token=...&amount=..."
# -> 402 Payment Required, with an x402 payment challenge in the response body

View the full README on GitHub

Details

Repository
github.com/br0ski777/bridge-routes-x402
Website
github.com/Br0ski777/bridge-routes-x402
Transport
SSE
Registry
MCP registry, active

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