FlashBank

Name: FlashBank
Author: Rotwang9000

by Rotwang9000version 1.1.1i★ –iRuns on your computer

Registry nameio.github.Rotwang9000/flashbank

Install

Overview

Description from the maker (original English)

Fixed-fee P2P term loans (no oracles) and flash loans on Ethereum, Base, Arbitrum and Sepolia.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Crypto & blockchain
You need to fill in: FLASHBANK_MCP_PRIVATE_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: FLASHBANK_MCP_PRIVATE_KEY, FLASHBANK_MCP_ALLOW_MAINNET, FLASHBANK_MCP_RPC_SEPOLIA

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "flashbank": {
      "command": "npx",
      "args": [
        "-y",
        "@flashbank/mcp"
      ],
      "env": {
        "FLASHBANK_MCP_PRIVATE_KEY": "your-value",
        "FLASHBANK_MCP_ALLOW_MAINNET": "your-value",
        "FLASHBANK_MCP_RPC_SEPOLIA": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add flashbank --env FLASHBANK_MCP_PRIVATE_KEY=your-value --env FLASHBANK_MCP_ALLOW_MAINNET=your-value --env FLASHBANK_MCP_RPC_SEPOLIA=your-value -- npx -y @flashbank/mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "flashbank": {
      "command": "npx",
      "args": [
        "-y",
        "@flashbank/mcp"
      ],
      "env": {
        "FLASHBANK_MCP_PRIVATE_KEY": "your-value",
        "FLASHBANK_MCP_ALLOW_MAINNET": "your-value",
        "FLASHBANK_MCP_RPC_SEPOLIA": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "flashbank": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@flashbank/mcp"
      ],
      "env": {
        "FLASHBANK_MCP_PRIVATE_KEY": "your-value",
        "FLASHBANK_MCP_ALLOW_MAINNET": "your-value",
        "FLASHBANK_MCP_RPC_SEPOLIA": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

FLASHBANK_MCP_PRIVATE_KEY secret env
Optional EVM private key enabling write tools (create/take/repay offers, faucet). Omit for read-only mode. Use a throwaway key.
FLASHBANK_MCP_ALLOW_MAINNET env
Set to 'true' to allow write tools on mainnets (Ethereum, Base, Arbitrum). Defaults to Sepolia-only writes.
FLASHBANK_MCP_RPC_SEPOLIA env
Optional custom RPC URL override for Sepolia (similarly FLASHBANK_MCP_RPC_ETHEREUM / _BASE / _ARBITRUM).

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Rotwang9000, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Crypto & blockchaini

More stars than 0% of the other 1614 servers in this category
Published to the registry more recently than 22% of the other 1614 servers in this category
Basic checks equal to or better than 100% of the other 1614 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is FlashBank safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: FLASHBANK_MCP_PRIVATE_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.1.1) reached the registry 5 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Crypto MCP Server, Crypto Defi MCP, Highwire

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

FlashBank

Non-custodial, on-chain lending where your funds stay in your wallet until the moment they're used. FlashBank is two complementary products that share that principle:

Product	What it is	Contract	Page
Flash Loans	Atomic, same-transaction liquidity for arbitrage, liquidations and MEV. Lenders approve and commit WETH from their own wallet — no deposits — and earn a fee on every loan.	`flashloans/` · `FlashBankRouter.sol`	`/`
P2P Term Loans	Fixed-term, collateral-backed loans agreed directly between two people. One flat fee instead of interest, settled purely on time — no pools, no price oracle, no liquidations to watch.	`loans/` · `FlashBankP2PLoan.sol`	`/p2p`

Branding rule: "flashbank" is only ever used as a verb (you *flashbank* a loan). FlashBank is

not a bank, does not hold deposits and takes no custody as a financial institution.

Website: [flashbank.net](https://flashbank.net) · Source: [github.com/Rotwang9000/flashbank-net](https://github.com/Rotwang9000/flashbank-net)

Flash Loans (the Router)

FlashBankRouter is a multi-provider flash-loan pool where liquidity providers keep custody:

No deposits. Providers approve the router and call setCommitment(token, limit, expiry, paused). WETH stays in their wallet and is only pulled for the microseconds of a flash loan.
Atomic or nothing. The borrower implements IL2FlashLoan and must repay principal + fee in the same transaction, or the whole thing reverts.
Configurable, bounded fees. Per-token feeBps (1–100 bps) with a separate owner cut (ownerFeeBps) and a per-tx max-borrow share of the pool (maxBorrowBps).
Dual-control admin. Sensitive changes (token config, ownership, profit withdrawal) use a propose-then-execute flow split between the owner and a separate admin. See docs/security/DUAL_CONTROL.md.

Provider flow (WETH):

await weth.deposit({ value: ethers.parseEther("5") });        // wrap ETH (stays in your wallet)

await weth.approve(routerAddress, ethers.MaxUint256); // approve once await router.setCommitment(wethAddress, ethers.parseEther("3"), 0, false); // lend up to 3 WETH // pause/resume any time — just flip the paused flag or drop the limit to 0

Borrower flow (MEV / arbitrage bots):

await router.flashLoan(

wethAddress, ethers.parseEther("100"), true, // receive native ETH (router unwraps WETH for you) strategyCalldata // forwarded to IL2FlashLoan.executeFlashLoan );

Lives in flashloans/. Deploy with cd flashloans && npx hardhat run scripts/deploy-router.js --network (set ADMIN_ADDRESS / TESTNET_ADMIN_ADDRESS in the repository-root .env). Per-network addresses are read from NEXT_PUBLIC_* env vars by the website.

P2P Term Loans

FlashBankP2PLoan is a neutral escrow that lets two parties flashbank a fixed-term, collateral-backed loan:

Time-only settlement. Repay principal + a flat fee before maturity + grace, or the lender claims the collateral. Nothing is priced on-chain, so no oracle is needed.
Optional surplus return (no oracle). An offer can set an agreed rate (stored as settlementValue — how much principal the whole collateral is taken to be worth, frozen at origination); on default the borrower then recovers any collateral beyond principal + fee. Leave it 0 for a pure pledge/forfeit. This honours Lorrow's surplus-return guardrail without an oracle — see docs/design/LORROW_COMPATIBILITY.md.
Editable offers, front-running-safe. While an offer is open the creator can re-price or amend its non-escrow terms in place (updateOffer) and top up featured placement (boostOffer) without forfeiting the existing boost. Each edit bumps a version; a taker can call takeChecked(id, version) to pin the exact terms they reviewed.
Flat fee, not interest. A single fixed fee rather than time-accruing interest — more compatible with faith-based finance that avoids *riba* (this is not a Sharia-certification claim).
Three optional, default-off fees:
an opt-in interface fee (lender-paid, only on offers posted through flashbank; 0% introductory),
an optional boost that buys featured marketplace placement ranked by spend (an advert, not interest — non-refundable),
a per-offer service fee to any address (insurance / third party). Go direct on the contract and it is zero commission.
Tokens are just ERC-20s. On mainnet/L2 the escrow uses real assets (WETH, USDC, …). On the testnet playground, fpETH/fpUSD are free faucet tokens with no value.

Lives in loans/. Full design: docs/design/P2P_LENDING_DESIGN.md.

Live on mainnet (Ethereum + Base)

FlashBankP2PLoan is deployed and verified on mainnet — judged solid by the self-audit and shipped while ETH gas was cheap. Same bytecode on each chain; Ownable, fee recipient = Vultisig vault, 0 bps introductory (a listing fee only ever applies to offers that opt in via listed, hard-capped on-chain at 1%). No external audit — use real assets at your own risk.

Chain	`FlashBankP2PLoan` (verified)
Ethereum	`0x131C…18A0`
Base	`0x86Fb…FcbB`

The mainnet UI uses real WETH/USDC. (Arbitrum pending — deployer balance too thin to deploy yet; add later with MAX_FEE_GWEI pinned low.) Per-chain records in loans/deployments/*-p2p.json.

Mainnet interface is restricted to ETH and USDC for now — custom-token entry is testnet-only — so the front end never invites an unknown/fake token (the contract itself stays permissionless for anyone calling it directly).

v2 — live on the Sepolia playground. FlashBankP2PLoanV2 adds on-chain token sanity-validation, a graduated cooling-off rebate (the flat fee vests from a 10% floor so a near-instant return is cheap — killing fake-token fee-farming — while consuming a listing is never free, and a same-block guard stops free flash loans), and pull-payout fallbacks so a blocklisted recipient can never brick the other party's repayment or default claim. Adversarially reviewed, unit-tested (22 cases) and deployed to Sepolia (verified, seeded) where it has passed a live two-agent lifecycle drill; mainnets stay on v1 until it graduates. Full pitfall analysis in docs/design/P2P_V2_COOLING_OFF.md.

Live on Sepolia (playground — testnet only, no real value)

A self-serve playground is deployed on Sepolia so anyone can try the whole flow end-to-end — it runs the v2 escrow, so the cooling-off rebate and pull-payouts are live there first. All source is verified on Etherscan; only key material stays in the untracked .env. Unaudited demo — never send real assets.

Contract	Address (verified)
`FlashBankP2PLoanV2` (cooling-off rebate + token checks + pull-payouts)	`0x536f…1E76`
`PlaygroundToken` fpUSD (6d)	`0x4aBb…760c`
`PlaygroundToken` fpETH (18d)	`0xB9CC…96F5`

Try it: open /p2p (defaults to Ethereum mainnet), switch to Sepolia, hit the faucet to mint test tokens, then post or take an offer (a few offers are pre-seeded, including boosted ones to show ranking and one with a creator-set 2-day cooling window). Redeploy with cd loans && npx hardhat run scripts/deploy-playground-v2.js --network sepolia (addresses recorded in loans/deployments/sepolia-playground-v2.json; the retired v1 playground 0x3Ce4…1017 stays on-chain).

For AI agents (MCP)

npx -y @flashbank/mcp     # zero-config read-only MCP server, any MCP client

The repo ships a self-contained Model Context Protocol server (mcp/, published as @flashbank/mcp, listed in the official MCP Registry and on Glama) so agents can flashbank too: browse open P2P offers, get quotes, check flash-loan liquidity and fees — and, with an explicitly configured throwaway key, post/take/repay loans and use the Sepolia faucet. Reads need no configuration; mainnet writes are double-gated behind FLASHBANK_MCP_PRIVATE_KEY *and* FLASHBANK_MCP_ALLOW_MAINNET=true. Takes always pin the exact reviewed terms on-chain, and on v2 chains the tools quote vested fees and report cooling-off rebates. The whole lifecycle is proven by a live two-agent drill (npm run drill) that walks faucet → create → take → early repay (rebate verified) → cancel through two real MCP server instances on Sepolia. Details and the tool catalogue: mcp/README.md.

Repository layout

Each feature is a self-contained Hardhat project. The two never import each other's Solidity, so you can fork this repo, delete the feature you don't want, and the other still compiles, tests and deploys.

flashloans/           Flash-loan router feature — own contracts/, test/, scripts/, test-scripts/, hardhat.config.js

loans/ P2P term-loan feature — own contracts/, test/, scripts/, deployments/, hardhat.config.js common/ Shared toolchain (hardhat.base.js) inherited by both features — do not delete website/ Next.js front end (static export, deployed to flashbank.net) — showcases both features mcp/ Model Context Protocol server so AI agents can browse/quote/transact (see mcp/README.md) docs/ Documentation (see docs/README.md) — architecture, security, deployment, design package.json Thin root: installs the shared dependencies and runs both features' scripts

Want only one feature? Delete the other top-level directory:

rm -rf flashloans   # keep just the P2P term loans

...or...

rm -rf loans # keep just the flash-loan router

common/ is shared by both and must stay. The website/ is a combined shopfront; if you drop a feature, also remove its page (website/src/pages/index.tsx for flash loans, website/src/pages/p2p.tsx for P2P) and its link in website/src/components/Nav.tsx.

A previous deposit-based design, FlashBankRevolutionary, predates the no-deposit Router. Its

contracts and notes live under flashloans/ for historical context; the Router and P2P escrow are

the current products.

Quick start

npm install            # installs the shared toolchain both features build against

npm run compile # compile both features npm test # run both features' test suites

work inside a single feature

cd flashloans && npx hardhat

Only the beginning is shown; read the rest in the repo

FlashBank

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Crypto & blockchaini

Common questions

Alternatives

Crypto MCP Server

Crypto Defi MCP

Highwire

README from the maker

FlashBank

Flash Loans (the Router)

P2P Term Loans

Live on mainnet (Ethereum + Base)

Live on Sepolia (playground — testnet only, no real value)

For AI agents (MCP)

Repository layout

...or...

Quick start

work inside a single feature