# 1Tx

> An MCP server that lets Claude, ChatGPT, Cursor or Codex compare lending markets across Aave, Morpho, Euler, Compound V3 and Fluid on Base, Arbitrum and Monad, then build deposits, bridges and loops for a non-custodial wallet you own. You approve every action; gas is paid in USDC.

1Tx is a remote MCP server for AI agents. Connect it to any MCP client,
sign in with Google, and the first sign-in creates the user's 1Tx wallet: an
ERC-4337 smart wallet they own, on Base, Arbitrum and Monad, that pays gas
in USDC. The agent discovers lending markets, measures candidate splits, and
builds deposits, withdrawals, CCTP bridges, loops and transfers. The server
never signs or sends: every action returns simulated calls and an approval
link (app.1tx.fi/approve/{actionId}) where the user reviews and approves.

## Connect

- MCP server: https://mcp.1tx.fi/mcp
- Transport: Streamable HTTP
- Auth: OAuth 2.1 with PKCE (S256) and dynamic client registration; scopes `read trade`
- Claude Code: claude mcp add --transport http 1tx https://mcp.1tx.fi/mcp
- Setup for every client: https://docs.1tx.fi/mcp/getting-started

## Tools

### Discover

- search_instruments: Lending markets with APY, TVL, tier, yield stability and entry/exit fees
- get_instruments: Up to 10 markets in depth: interest vs rewards, 30 days of daily APY, correlations
- search_loops: Loopable collateral and debt pairs
- compare_allocations: Up to 4 candidate portfolios measured side by side, all-in-one included
- price_rebalance: The legs, costs, yearly gain and payback of moving a book to target weights

### Act

- deposit: Into any market, swapping first if needed
- withdraw: An amount or max, optionally swapped back to USDC
- bridge: USDC between chains over Circle CCTP V2, standard or fast
- redeem_bridge: Redeem on the destination chain, and deposit in the same batch
- open_loop: A levered loop as one atomic batch, health factor measured
- adjust_loop: Change a loop's leverage
- close_loop: Unwind a loop completely
- transfer: Send a token out of the wallet to an address you name

### Track

- status: The wallet's book, read live on every chain, and its open actions
- history: Every action with its transactions and the gas it cost in USDC
- action_status: Whether one action has landed; for a bridge, its CCTP state

Prompts: `start` (What 1Tx does, then one market or a portfolio); `build-portfolio` (Your amount and limits → candidate splits → the moves for the one you pick).

Amounts are raw token units (read decimals from search_instruments or
get_instruments). Results are values and codes, not advice: 1Tx measures and
builds, it never picks instruments or weights.

## Links

- Docs: https://docs.1tx.fi
- MCP tools: https://docs.1tx.fi/mcp/tools
- Your wallet: https://docs.1tx.fi/mcp/your-wallet
- Wallet setup: https://app.1tx.fi/agents/setup
- Live markets: https://app.1tx.fi/markets
- REST API for builders (same data and bundles): https://docs.1tx.fi/use-cases/ai-agents
- API base: https://api.1tx.fi/api/v1
- For teams (wallets, fintechs): https://1tx.fi/for-teams
- Contact: hello@1tx.fi

## Coverage

- Act on: Base, Arbitrum, Monad. Unichain markets are readable, not actionable.
- Protocols: Aave, Morpho, Euler, Compound V3, Fluid and others.
- The live list is search_instruments.

## Honest status

- Non-custodial: 1Tx never holds keys or funds. The only contract 1Tx deploys
  for agents is a stateless attribution tag (0x7d319f81bdCca90A3546d799d881C527F271655f,
  same address on every chain) that emits Tagged(account, actionId).
- No 1Tx fee today. Gas is paid in USDC; protocol entry/exit fees and the
  Circle fast-bridge fee are shown before approval.
- Experimental software: review every action, use small amounts.
- Yield rates are variable. Nothing here is financial advice.