Open source · verified on Etherscan · self-custody throughout
To flashbank
To move money on-chain without handing it to anyone. Two ways to do it: an atomic flash loan, or a fixed-term peer-to-peer loan agreed directly between two people. No deposits, no custody, no nonsense.
Flash loans
Flashbank a large sum for the lifetime of a single transaction — arbitrage, refinance, liquidate — and repay it plus a small capped fee before the block closes. If anything fails, the whole thing never happened.
- Borrow, use and repay in one atomic transaction — it cannot half-happen
- Liquidity never leaves the providers’ own wallets (allowance-based, no deposits)
- Live on Ethereum, Base and Arbitrum · capped fees, immutable router
P2P term loans
Flashbank a loan directly with another person: collateral and terms locked in a neutral escrow, one flat fee instead of interest, and settlement decided purely by the clock — never by a price feed.
- Fixed term, one flat fee — no interest clock, no price oracle, no margin calls
- Settles purely on time: repay before the deadline or the collateral is claimable
- Live on Ethereum and Base · direct on the contract is zero commission
A candid self-review of both products that leads with the limitations, not the badges.
Plain-English walkthroughs, diagrams and a scenario calculator for the loan mechanics.
Contracts verified on Etherscan; the whole repo — site included — is on GitHub.
A Sepolia playground with faucet play-money (fpETH/fpUSD) — experiment with big numbers at zero risk.
Agents can flashbank too
An open-source MCP server lets AI agents browse offers, quote fees and check flash-loan liquidity with zero configuration — and, with an explicitly configured throwaway key, transact on the Sepolia playground. Mainnet writes are double-gated.
npx -y @flashbank/mcp
Find the opportunity, then flashbank it
A flash loan is the capital — you still need the opportunity and a way to land it. Seneschal, from the same author, is a pay-per-call data shop for searchers and agents that pairs naturally with FlashBank.
rpc.seneschal.space) to land your arbitrage or liquidation bundle. Like FlashBank, it ships an MCP server — no API key.