Orkid Cross-Chain Bridge

Bridge EVM tokens across chains through Orkid's orkid_bridge_quote tool — Across protocol under the hood, non-custodial (unsigned tx data returned; the depositor wallet signs and broadcasts).

Endpoint

• Streamable HTTP: https://orkidlabs.xyz/api/mcp
• stdio bridge: npx -y orkid-swap-mcp

Discovery methods are unauthenticated. tools/call requires X-ORKID-API-Key (free key at https://orkidlabs.xyz/partner) or x402 payment — $0.002 USDC on Base per call, scheme: "exact", EIP-3009. On PaymentRequired, sign and retry with _meta["x402/payment"].

Tool: orkid_bridge_quote

Args:

• originChainId / destinationChainId — 1 | 8453 | 42161 | 137 | 4663 (Ethereum, Base, Arbitrum, Polygon, Robinhood Chain)
• inputToken / outputToken — symbol or contract address
• amount — positive integer in base units (e.g. "25000000" = 25 USDC)
• depositor — the wallet that will sign (required; validated)
• recipient — optional, defaults to depositor

Returns expected output amount, fill time, approval transactions, and the unsigned swap transaction for the depositor to sign. Orkid never touches the funds.

Coverage notes

• Robinhood Chain inbound verified: Arbitrum → Robinhood and Base → Robinhood for ETH, WETH, and USDC → USDG — the on-ramp for tokenized equities.
• Polygon is bridge-only: no same-chain swaps on Polygon, but bridging in and out is live.
• Same chain? Use the swap tool instead — see the sibling skill orkid-swap-mcp for same-chain routing on Base, Ethereum, Arbitrum, Unichain, BSC, and Robinhood.

Usage pattern

1. User states intent ("bridge 100 USDC from Base to Arbitrum").
2. Resolve token symbols to amounts in base units (USDC = 6 decimals).
3. Call orkid_bridge_quote with the user's wallet as depositor.
4. Return the unsigned transactions to the user for signing — never sign on their behalf.

Links

• Docs: https://docs.orkidlabs.xyz/docs/x402
• Site: https://orkidlabs.xyz
• Official MCP Registry: xyz.orkidlabs/orkid-swap