LayerZero Bridge Skill

The most complete LayerZero V2 MCP server available. 20 tools covering every LayerZero integration surface: low-level EndpointV2 messaging, OFT token transfers, Stargate V2 native bridging (ETH/USDC/USDT via StargatePoolNative contracts), and the new Value Transfer API (unified quotes across 130+ chains including Solana).

MCP Endpoint

For local development, use http://localhost:3006/mcp.

LayerZero V2 Overview

LayerZero is an omnichain interoperability protocol enabling cross-chain messaging between 130+ blockchains. V2 uses EndpointV2 contracts with configurable security (DVNs) and execution (Executors).

Key concepts:

• EID (Endpoint ID) — Unique chain identifier (Ethereum: 30101, Solana: 30168)
• OFT (Omnichain Fungible Token) — Tokens transferable across chains via LayerZero. OFT V2 uses uint64 amountSD (shared decimals) instead of uint256 amountLD
• Stargate V2 — Liquidity-based bridge built on LayerZero for native assets (ETH, USDC, USDT)
• Value Transfer API — New unified LayerZero API replacing deprecated Stargate REST API (130+ chains)
• DVN (Decentralized Verifier Network) — Security verification layer
• Options — TYPE_3 options (version tag 0x0003) for configurable gas and native drop on destination execution

Supported Chains (16 chains):

Tools (21)

Messaging (4 tools)

#### lz_quote_fee Estimate cross-chain messaging fee via EndpointV2.quote().

Parameters:

• src_chain (string, required) — Source chain name (e.g. "ethereum")
• dst_eid (u32, required) — Destination endpoint ID
• message_hex (string, optional, default "0x") — Message payload
• options_hex (string, optional) — Encoded options (default: 200k gas lzReceive)
• sender_hex (string, optional) — Sender address

Returns: Native fee and LZ token fee in Wei.

#### lz_send_message Build cross-chain message transaction data for EndpointV2.send().

Parameters:

• src_chain (string, required) — Source chain
• dst_eid (u32, required) — Destination EID
• receiver (string, required) — Destination receiver (bytes32 hex)
• message_hex (string, required) — Message payload
• options_hex (string, optional) — Encoded options

Returns: Hex-encoded transaction calldata.

#### lz_track_message Track cross-chain message status via LayerZero Scan API.

Parameters:

• tx_hash (string, required) — Source transaction hash

Returns: Message status (INFLIGHT / CONFIRMING / DELIVERED / FAILED / BLOCKED), source/destination chains, GUID.

#### lz_get_message Get message details by GUID.

Parameters:

• guid (string, required) — Message GUID

Returns: Full message details.

OFT — Omnichain Fungible Token (4 tools)

#### lz_oft_quote Quote an OFT token transfer fee.

Parameters:

• src_chain (string, required) — Source chain name
• dst_chain (string, required) — Destination chain name
• amount (string, required) — Amount to transfer
• token_symbol (string, required) — Token symbol

Returns: Fee quote, estimated delivery time.

#### lz_oft_send Build OFT send() calldata with automatic fee quoting. OFT V2 uses uint64 amountSD (shared decimals).

Parameters:

• src_chain (string, required) — Source chain name
• dst_chain (string, required) — Destination chain name
• oft_address (string, required) — OFT contract address on source chain
• recipient (string, required) — Recipient address (20 bytes EVM)
• amount (string, required) — Amount in shared decimals (amountSD, uint64)
• min_amount (string, optional) — Minimum acceptable in shared decimals (minAmountSD, uint64, default: 90% of amount)
• gas_limit (u128, optional) — lzReceive gas on destination (default: 200000)

Returns: Hex calldata for OFT.send(), msg.value, quoted fee, amount_sd received.

#### lz_oft_list List available OFT tokens across all chains.

Returns: Token name, symbol, chains deployed on, addresses.

#### lz_encode_options Encode LayerZero TYPE_3 options bytes (version tag 0x0003, the current standard format).

Parameters:

• gas_limit (u64, optional, default 200000) — Gas for lzReceive on destination
• native_drop (u64, optional, default 0) — Native token to airdrop on destination

Returns: Hex-encoded TYPE_3 options bytes.

Value Transfer API (5 tools) — replaces deprecated Stargate REST API

#### lz_transfer_quote Get a cross-chain transfer quote from the unified LayerZero Value Transfer API. Supports 130+ chains including Solana.

Parameters:

• src_chain (string, required) — Source chain key (e.g. "optimism", "solana")
• dst_chain (string, required) — Destination chain key (e.g. "base", "solana")
• src_token (string, required) — Source token address (0xEeee...eEEeE for native ETH)
• dst_token (string, required) — Destination token address
• amount (string, required) — Amount in base units
• src_address (string, required) — Sender wallet address
• dst_address (string, required) — Recipient wallet address

Returns: Quote with fees, estimated time, and quote ID for building transaction steps.

#### lz_transfer_build Build signable transaction steps from a Value Transfer API quote.

Parameters:

• quote_id (string, required) — Quote ID from lz_transfer_quote

Returns: Pre-built transaction calldata (to, data, value) that the caller signs and broadcasts.

#### lz_transfer_status Check transfer status by quote ID.

Parameters:

• quote_id (string, required) — Quote ID or transfer ID

Returns: Transfer status, source/destination tx hashes, delivery progress.

#### lz_transfer_chains List all chains supported by the Value Transfer API.

Returns: 130+ chains with chain keys, names, and types.

#### lz_transfer_tokens List tokens available for transfer, optionally filtered by chain.

Parameters:

• chain (string, optional) — Filter by chain key

Returns: Token addresses, symbols, decimals, supported chains.

Stargate V2 Native Bridging (2 tools)

#### lz_stargate_quote Quote a Stargate V2 native bridge fee via quoteSend() on StargatePoolNative contracts.

Parameters:

• src_chain (string, required) — Source chain (ethereum/optimism/arbitrum/base)
• dst_chain (string, required) — Destination chain
• token (string, required) — Token: "ETH", "USDC", or "USDT"
• amount (string, required) — Amount in base units (wei)
• wallet_address (string, required) — Wallet address (20 bytes)

Returns: Native fee, LZ fee, amount received, total msg.value, pool contract address.

Stargate V2 Pool Contracts:

#### lz_stargate_send Build sendToken() calldata for a Stargate V2 bridge transfer with automatic fee quoting.

Parameters:

• src_chain (string, required) — Source chain
• dst_chain (string, required) — Destination chain
• token (string, required) — Token: "ETH", "USDC", or "USDT"
• amount (string, required) — Amount in base units
• wallet_address (string, required) — Wallet address
• slippage_bps (u32, optional) — Slippage tolerance in bps (default: 50 = 0.5%)

Returns: Hex calldata, pool contract, msg.value, fee breakdown. For ERC-20 tokens, includes approval calldata and token contract address.

Network (5 tools)

#### lz_get_deployments Get LayerZero deployment addresses for all supported chains.

Returns: EndpointV2, SendLib, ReceiveLib addresses per chain.

#### lz_list_dvns List available Decentralized Verifier Networks.

Returns: DVN name, address, supported chains, security level.

#### lz_get_messages_by_address Get recent messages sent by a wallet address.

Parameters:

• address (string, required) — Wallet address
• limit (u32, optional, default 10) — Max results

Returns: List of messages with status, chains, timestamps.

#### lz_list_chains List all supported LayerZero chains with their EIDs.

Returns: Chain name, EID, status.

#### lz_get_chain_rpc Get the RPC URL for a specific chain.

Parameters:

• chain_name (string, required) — Chain name (e.g. "ethereum", "arbitrum")

Returns: RPC URL.

Common Workflows

Bridge Native ETH (Optimism -> Base) via Stargate V2

1. lz_stargate_quote(src_chain="optimism", dst_chain="base", token="ETH", amount="300000000000000", wallet_address="0x...") — Get fee quote
2. lz_stargate_send(src_chain="optimism", dst_chain="base", token="ETH", amount="300000000000000", wallet_address="0x...") — Build tx calldata
3. Sign and broadcast the transaction with msg.value from the response
4. lz_track_message(tx_hash="0x...") — Track delivery

Bridge USDC (Ethereum -> Arbitrum) via Stargate V2

1. lz_stargate_send(src_chain="ethereum", dst_chain="arbitrum", token="USDC", amount="1000000", wallet_address="0x...") — Quote + build
2. First, submit the approval_step transaction (approve pool to spend USDC)
3. Then, submit the main sendToken transaction
4. lz_track_message(tx_hash="0x...") — Track delivery

Transfer via Value Transfer API (any chain including Solana)

1. lz_transfer_chains() — Find chain keys
2. lz_transfer_tokens(chain="optimism") — Find available tokens
3. lz_transfer_quote(src_chain="optimism", dst_chain="solana", ...) — Get quote
4. lz_transfer_build(quote_id="...") — Get signable transaction steps
5. Sign and broadcast each step
6. lz_transfer_status(quote_id="...") — Track delivery

Bridge OFT Tokens Cross-Chain

1. lz_oft_list() — Find available OFT tokens
2. lz_oft_send(src_chain="ethereum", dst_chain="arbitrum", oft_address="0x...", recipient="0x...", amount="1000000000000000000") — Build tx
3. Sign and broadcast with msg.value from response
4. lz_track_message(tx_hash="0x...") — Monitor delivery

Send Custom Message

1. lz_list_chains() — Find destination EID
2. lz_quote_fee(src_chain="ethereum", dst_eid=30110) — Quote fee
3. lz_send_message(src_chain="ethereum", dst_eid=30110, receiver="0x...", message_hex="0x...") — Build tx
4. lz_track_message(tx_hash="0x...") — Monitor delivery

Monitor Network

1. lz_get_deployments() — Contract addresses
2. lz_list_dvns() — Available verifiers
3. lz_get_messages_by_address(address="0x...") — Recent activity