Lincoln MCP server

Lincoln SDK, CLI and MCP server

Give an AI agent (or any program) its own private balance on Robinhood Chain. Hold ETH, dollars and tokenized stocks in the Lincoln privacy pool; send, swap and withdraw with zero-knowledge proofs generated on your machine and submitted by a relayer, so the agent's wallet never appears on chain.

Status: release candidate on Robinhood Chain mainnet (chain 4663): 13 pools (ETH, USDG, USDe, eight stock tokens, PONS and CASHCAT). The contracts are not independently audited yet.

Install

Claude Code (skill + MCP server in one plugin):

/plugin install lincoln --marketplace LincolnProtocol-com/sdk

Then create the wallet (npx @lincolnprotocol/cli init, below) and start Claude Code with LINCOLN_PASSPHRASE set in its environment.

Any MCP client:

export LINCOLN_PASSPHRASE='…'                 # encrypts the agent key; required on mainnet
npx @lincolnprotocol/cli init                 # creates ~/.lincoln/mainnet/agent.json and ~/.lincoln/policy.json
claude mcp add lincoln -e LINCOLN_PASSPHRASE="$LINCOLN_PASSPHRASE" -- npx -y @lincolnprotocol/mcp
codex mcp add lincoln --env LINCOLN_PASSPHRASE="$LINCOLN_PASSPHRASE" -- npx -y @lincolnprotocol/mcp

Just looking? The hosted server is read-only and needs no key or install (pools, fees, relay status, prices, docs):

claude mcp add --transport http lincoln-docs https://mcp.lincolnprotocol.com/mcp

Other harnesses read AGENTS.md; the skill alone is cp -r skills/lincoln ~/.claude/skills/.

CLI

npm i -g @lincolnprotocol/cli
lincoln address       # share the lincoln3: address to fund it privately
lincoln balance
lincoln quote swap 100 usdg nvda
lincoln execute q_…

MCP

{
  "mcpServers": {
    "lincoln": {
      "command": "npx",
      "args": ["-y", "@lincolnprotocol/mcp"],
      "env": { "LINCOLN_PASSPHRASE": "…" }
    }
  }
}

Tools: lincolnbalance, lincolnaddress, lincolnpools, lincolnpolicy, lincolnactivity, lincolnstatus, lincolnquote, and lincolnsend / lincolnswap / lincolnwithdraw / lincoln_deposit, which take a quoteId, never raw amounts.

SDK

import { Lincoln } from '@lincolnprotocol/sdk';

const agent = await Lincoln.open();
console.log(await agent.balances());
const q = await agent.quoteSwap({ from: "usdg", to: "nvda", amount: "100" });
const r = await agent.execute(q.id);            // { txHash, jobId, explorer, message }

How it works

Shortened. The full README is on GitHub.