Haiku MCP Server

An MCP (Model Context Protocol) server that enables AI agents to execute blockchain transactions via the Haiku API.

Features

• Token Discovery: List supported tokens and DeFi assets across 21 blockchain networks
• Balance Checking: Get wallet balances across all supported chains
• Trading Quotes: Get quotes for swaps and portfolio rebalancing
• Transaction Building: Convert quotes to unsigned EVM transactions
• Wallet Integration: Extract EIP-712 payloads for external wallet signing (Coinbase, AgentKit, Safe, etc.)
• Self-Contained Execution: Optional end-to-end execution with WALLET_PRIVATE_KEY env var
• Yield Discovery: Find the highest-yielding DeFi opportunities across protocols and chains, filtered by APY, TVL, and category
• Portfolio Analysis: Analyze a wallet's holdings and surface context-specific yield opportunities based on what it actually holds

Installation

npm install haiku-mcp-server

Or run directly with npx:

npx haiku-mcp-server

Configuration

Environment Variables

Variable	Required	Description
HAIKU_API_KEY	No	Your Haiku API key for higher rate limits. Contact contact@haiku.trade to request one.
HAIKU_BASE_URL	No	API base URL. Defaults to https://api.haiku.trade/v1
WALLET_PRIVATE_KEY	No	Private key (0x hex) for self-contained execution via haiku_execute.
RPC_URL_{chainId}	No	Override RPC URL for a specific chain (e.g., RPC_URL_42161 for Arbitrum).

Note: The API works without a key, but providing one unlocks higher rate limits for production use.

Claude Desktop Configuration

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "haiku": {
      "command": "npx",
      "args": ["haiku-mcp-server"]
    }
  }
}

With API key for higher rate limits:

{
  "mcpServers": {
    "haiku": {
      "command": "npx",
      "args": ["haiku-mcp-server"],
      "env": {
        "HAIKU_API_KEY": "your-api-key-here"
      }
    }
  }
}

Available Tools

haiku_get_tokens

Get supported tokens and DeFi assets for trading.

Parameters:

• network (optional): Filter by chain ID (e.g., 42161 for Arbitrum)
• category (optional): Filter by token category:
  • token - Vanilla tokens (ETH, USDC, etc.)
  • collateral - eg. Aave aTokens (deposited collateral)
  • varDebt - eg. Aave variable debt tokens
  • vault - eg. Yearn/Morpho yield vaults
  • weightedLiquidity - eg. Balancer LP tokens
  • concentratedLiquidity - eg. Uniswap V3 LP positions

Example:

{
  "network": 42161,
  "category": "token"
}

haiku_get_balances

Get token balances for a wallet address across all chains.

Parameters:

• walletAddress (optional): Wallet address or ENS name. Required when WALLET_PRIVATE_KEY is not set; omit to auto-derive from WALLET_PRIVATE_KEY when it is set.

Example:

{
  "walletAddress": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}

Omit walletAddress when WALLET_PRIVATE_KEY is set to use the derived address.

haiku_get_quote

Get a quote for a token swap or portfolio rebalance.

Note: Quotes are valid for 5 minutes, but execute as quickly as possible after quoting — the longer you wait, the more likely prices have moved and the transaction will fail on-chain.

Parameters:

• inputPositions (required): Map of token IID to amount to spend
• targetWeights (required): Map of output token IID to weight (must sum to 1)
• slippage (optional): Max slippage as decimal (default: 0.003)
• receiver: Receiving wallet address. Required when WALLET_PRIVATE_KEY is not set — must be provided explicitly. When WALLET_PRIVATE_KEY is set, auto-derived if omitted. When WALLET_PRIVATE_KEY is not set (Path B), you must pass receiver explicitly.

Example:

{
  "inputPositions": {
    "arb:0x82aF49447D8a07e3bd95BD0d56f35241523fBab1": "1.0"
  },
  "targetWeights": {
    "arb:0xaf88d065e77c8cC2239327C5EDb3A432268e5831": 0.5,
    "arb:0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9": 0.5
  },
  "slippage": 0.005
}

Example above omits receiver (valid when WALLET_PRIVATE_KEY is set). For Path B, include "receiver": "0x...".

haiku_prepare_signatures

Extract and normalize EIP-712 signing payloads from a quote for external wallet signing (Path B only). When using quoteId, the quote must have been obtained in the same session.

Use this when a wallet MCP handles signing (Coinbase Payments MCP, wallet-agent, AgentKit, Safe, etc.). Returns standardized typed data that any wallet's signTypedData can consume, plus step-by-step instructions.

Parameters:

• quoteId (preferred): Quote ID from haiku_get_quote — server resolves the full quote from session cache. QuoteId only works when the quote was returned by haiku_get_quote in the same MCP session; otherwise use quoteResponse.
• quoteResponse (fallback): Full response object from haiku_get_quote, if quoteId is unavailable

Returns:

• requiresPermit2: Whether Permit2 signature is needed
• permit2: EIP-712 payload to pass to signTypedData (if required)
• requiresBridgeSignature: Whether bridge signature is needed
• bridgeIntent: EIP-712 payload to pass to signTypedData (if required)
• sourceChainId: Chain ID for the transaction
• instructions: Step-by-step instructions for completing the flow

Example:

{
  "quoteId": "abc123..."
}

haiku_discover_yields

Discover yield-bearing opportunities across DeFi protocols, ranked by APY or TVL.

Use this to answer questions like "best lending yields on Arbitrum", "highest APY vaults with at least $1M TVL", or "what can I do with USDC on Base". The iid field in results can be used directly as a key in the targetWeights object in haiku_get_quote.

Parameters:

• network (optional): Filter by chain ID (e.g., 42161 for Arbitrum)
• category (optional): lending (Aave collateral), vault (Yearn/Morpho), lp (Balancer/Uniswap), all (default)
• minApy (optional): Minimum APY as a percentage (e.g., 5 means ≥5% APY)
• minTvl (optional): Minimum TVL in USD (e.g., 1000000 means ≥$1M). Filters to established mainstream vaults.
• sortBy (optional): apy (default) or tvl, descending
• limit (optional): Max results (default 20)

Example:

{
  "network": 42161,
  "category": "lending",
  "minTvl": 1000000,
  "sortBy": "apy",
  "limit": 10
}

haiku_analyze_portfolio

Analyze a wallet's DeFi portfolio and surface relevant yield opportunities.

Returns current positions enriched with available APY options, collateral health factors, and context-specific opportunities based on what the wallet actually holds. Pair with haiku_discover_yields for broader market context, then use haiku_get_quote to execute.

Parameters:

• walletAddress (required): Wallet address (0x...) to analyze

Example:

{
  "walletAddress": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}

haiku_execute

Execute a quote. Two distinct paths depending on who holds the private key.

Path A — Self-contained (WALLET_PRIVATE_KEY set in env): Haiku signs Permit2/bridge payloads internally and broadcasts. Returns a tx hash.

Parameters:

• quoteId (required): Quote ID from haiku_get_quote
• sourceChainId (recommended): Chain ID from the quote response. Omit only if the quote was obtained in the same session — the server can recover from cache.
• permit2SigningPayload (optional): Pass through from haiku_get_quote if present
• bridgeSigningPayload (optional): Pass through from haiku_get_quote if present (cross-chain only)
• approvals (optional): Pass through from haiku_get_quote if present

Example:

{
  "quoteId": "abc123...",
  "sourceChainId": 42161,
  "permit2SigningPayload": { /* from haiku_get_quote, if present */ },
  "approvals": [ /* from haiku_get_quote, if present */ ]
}

---

Path B — External wallet (no WALLET_PRIVATE_KEY, using a wallet MCP): You sign and broadcast. broadcast: false is required — without WALLET_PRIVATE_KEY, haiku cannot sign or send the final EVM transaction. If you call haiku_execute with broadcast: true and no WALLET_PRIVATE_KEY, the server returns an error directing you to set broadcast: false and broadcast the returned transaction via your wallet MCP.

Before calling haiku_execute:

1. If approvals is non-empty in the quote: broadcast each approval as a transaction { to, data, value } (include value when present, e.g. for native token) via your wallet MCP and wait for confirmation.
2. If signatures are required: call haiku_prepare_signatures with the quoteId, sign the returned EIP-712 payloads via your wallet MCP, then pass the signatures here.

Parameters:

• quoteId (required): Quote ID from haiku_get_quote
• sourceChainId (recommended): Chain ID from the quote response. Omit only if the quote was obtained in the same session — the server can recover from cache.
• broadcast (required): Must be false — haiku returns the unsigned tx for you to broadcast
• permit2Signature (optional): Signature from signing the Permit2 payload via your wallet MCP
• userSignature (optional): Signature from signing the bridge payload via your wallet MCP (cross-chain only)

Example:

{
  "quoteId": "abc123...",
  "sourceChainId": 42161,
  "broadcast": false,
  "permit2Signature": "0x..."
}

Returns { transaction: { to, data, value, chainId } } — pass transaction to your wallet MCP's sendTransaction.

Token IID Format

Tokens are identified using the IID format: chainSlug:tokenAddress

Examples:

• arb:0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 - WETH on Arbitrum
• arb:0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee - Native ETH on Arbitrum
• base:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 - USDC on Base

Supported Chains

Chain	Chain ID	Slug
Arbitrum	42161	arb
Avalanche	43114	avax
Base	8453	base
Berachain	80094	bera
BNB Smart Chain	56	bsc
Bob	60808	bob
Ethereum	1	eth
Gnosis	100	gnosis
Hyperliquid	999	hype
Katana	747474	katana
Lisk	1135	lisk
MegaETH	4326	megaeth
Monad	143	monad
Optimism	10	opt
Plasma	9745	plasma
Polygon	137	poly
Scroll	534352	scroll
Sei	1329	sei
Sonic	146	sonic
Unichain	130	uni
World Chain	480	worldchain
ApeChain	33139	ape

Workflow Examples

Path A: Self-Contained Swap (WALLET_PRIVATE_KEY set)

Haiku handles all signing and broadcasting. Returns a tx hash.

1. haiku_get_quote(inputPositions, targetWeights) → returns quoteId, sourceChainId, permit2SigningPayload?, bridgeSigningPayload?, approvals
2. haiku_execute(quoteId, sourceChainId, permit2SigningPayload?, bridgeSigningPayload?, approvals)
   → Haiku broadcasts approvals, signs Permit2/bridge internally, broadcasts swap, returns tx hash

Path B: External Wallet (wallet MCP handles signing + broadcasting)

Use when WALLET_PRIVATE_KEY is not set and a separate wallet MCP holds the keys.

Simple swap (no Permit2 or bridge signatures needed, e.g. native ETH input):

1. haiku_get_quote(inputPositions, targetWeights, receiver) → returns quoteId, sourceChainId, approvals
2. For each item in approvals: broadcast as transaction { to, data, value } (include value when present) via wallet MCP and wait for confirmation
3. haiku_execute(quoteId, sourceChainId, broadcast: false)
   → returns { transaction: { to, data, value, chainId } }
4. Broadcast transaction via wallet MCP

With Permit2 or bridge signatures (e.g. ERC-20 input or cross-chain swap):

1. haiku_get_quote(inputPositions, targetWeights, receiver) → returns quoteId, sourceChainId, approvals, permit2SigningPayload?, bridgeSigningPayload?
2. For each item in approvals: broadcast as transaction { to, data, value } (include value when present) via wallet MCP and wait for confirmation
3. haiku_prepare_signatures(quoteId) → returns normalized EIP-712 payloads + step-by-step instructions
4. Sign payloads via wallet MCP (e.g. coinbase_sign_typed_data) → get permit2Signature?, userSignature?
5. haiku_execute(quoteId, sourceChainId, permit2Signature?, userSignature?, broadcast: false)
   → returns { transaction: { to, data, value, chainId } }
6. Broadcast transaction via wallet MCP (e.g. coinbase_send_transaction)

Yield Discovery

1. haiku_discover_yields with category/network/minTvl filters → find opportunities, note iid
2. haiku_get_quote with the chosen iid as a key in targetWeights
3. Execute via Path A or Path B above

Portfolio Analysis & Optimization

1. haiku_analyze_portfolio with wallet address → review positions and opportunities
2. Optionally haiku_discover_yields for broader market context
3. haiku_get_quote to rebalance into higher-yielding positions
4. Execute via Path A or Path B above

Transaction Signing

Two modes depending on your setup:

Self-contained (WALLET_PRIVATE_KEY set): haiku_execute signs everything internally and broadcasts. Returns a tx hash. No external signing needed.

External wallet (no WALLET_PRIVATE_KEY): Use haiku_execute with broadcast: false (required — haiku cannot sign or broadcast without the private key). If you call haiku_execute with broadcast: true and no WALLET_PRIVATE_KEY, the server returns an error directing you to set broadcast: false and broadcast the returned transaction via your wallet MCP. Returns { transaction: { to, data, value, chainId } } for your wallet MCP to broadcast. If Permit2 or bridge signatures are required, call haiku_prepare_signatures first. If approvals are present in the quote, broadcast each approval { to, data, value } (include value when present, e.g. for native token) via your wallet MCP before calling haiku_execute.

The external wallet design allows agents to use any signing infrastructure (wallet MCPs, hardware wallets, custodial services, MPC, etc.).

Cross-Chain Bridge Signatures

For cross-chain swaps, the quote may return isComplexBridge: true, indicating a bridge intent signature is required in addition to (or instead of) Permit2.

Self-contained (Path A): Pass bridgeSigningPayload from the quote to haiku_execute — it handles the bridge signature internally.

External wallet (Path B): Call haiku_prepare_signatures with the quoteId — it returns a normalized bridgeIntent EIP-712 payload. Sign it via your wallet MCP and pass the result as userSignature to haiku_execute.

Transport Modes

Stdio (default)

Standard MCP stdio transport — used by Claude Desktop, Cursor, etc.

npx haiku-mcp-server

Streamable HTTP

HTTP transport for remote hosting, Smithery, and web-based MCP clients.

npx haiku-mcp-server --http
npx haiku-mcp-server --http --port=8080

Endpoints:

• POST /mcp — MCP Streamable HTTP endpoint
• GET /health — Health check

Development

# Install dependencies
npm install

# Build
npm run build

# Run locally (stdio, works without API key)
npm start

# Run locally (HTTP)
npm run start:http

# Run with API key for higher rate limits
HAIKU_API_KEY=your-key npm start

License

MIT