Peil

Name: Peil
Author: Luminc

by Lumincversion 0.1.5i★ –iRuns on your computer

Registry nameapp.peil/peil-mcp

Install

Overview

Description from the maker (original English)

Log hours, draft invoices and check where you stand — finance for Dutch freelancers.

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: Accounting, finance & tax
You need to fill in: PEIL_API_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: PEIL_API_KEY, PEIL_API_URL

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

You need

PyPIPython’s uv installed (for the uvx 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": {
    "peil": {
      "command": "uvx",
      "args": [
        "peil-mcp"
      ],
      "env": {
        "PEIL_API_KEY": "your-value",
        "PEIL_API_URL": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add peil --env PEIL_API_KEY=your-value --env PEIL_API_URL=your-value -- uvx peil-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": {
    "peil": {
      "command": "uvx",
      "args": [
        "peil-mcp"
      ],
      "env": {
        "PEIL_API_KEY": "your-value",
        "PEIL_API_URL": "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": {
    "peil": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "peil-mcp"
      ],
      "env": {
        "PEIL_API_KEY": "your-value",
        "PEIL_API_URL": "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

PEIL_API_KEY secret required env
Scoped API key from Peil under Settings -> Developer settings.
PEIL_API_URL env
Override the API base URL. Defaults to https://api.peil.app/api/v1.

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 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain peil.app (the registry checks domain ownership)
… 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 Accounting, finance & taxi

More stars than 0% of the other 1722 servers in this category
Published to the registry more recently than 59% of the other 1722 servers in this category
Basic checks equal to or better than 100% of the other 1722 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 Peil 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: PEIL_API_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 (0.1.5) reached the registry 27 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Finance Toolkit, SolidInvoice, Korea Tax Calculator

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Finance Toolkit

by JerBouma

500+ transparent financial methods calculated from raw statements, not third-party endpoints.

Computer or cloud★ 5,496MITUpdated yesterday

Install

SolidInvoice

by SolidInvoice

Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.

Runs in the cloud★ 981MITUpdated 7 days ago

Install

Korea Tax Calculator

by UpstageAI

Korean tax calculation and tax-audit judgment MCP: 96 tools with statutory citations.

Runs on your computer★ 97MITUpdated today

Install

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.

Peil MCP server

mcp-name: app.peil/peil-mcp

Connect Peil to Claude (or any MCP client): log hours, draft invoices from unbilled hours, add expenses from a receipt, and check where you stand — from a prompt.

Website: https://peil.app
Docs: https://peil.app/en/docs/mcp
Source: https://github.com/Luminc/peil-mcp

The server is a pure client of Peil's public API. It authenticates with a scoped API key you create in Peil under Settings → Developer. Keys and this server are free on every plan; what is Pro in Peil (emailing invoices, reminders, recurring invoices) stays Pro over a key too.

Draft-by-default

draft_invoice only ever creates a draft — nothing is sent to your clients. Sending is a separate tool (send_invoice) that also requires the separate invoices:send permission on your key. A key without that permission can never email anything on your behalf.

Tools

Reads (read)

Tool	What it does
`list_clients`	List your clients
`get_client_details`	One client's details, incl. whether a default rate is set
`list_unbilled`	Unbilled hours per client for a period
`list_invoices`	List invoices, filterable by status / client
`orientation_snapshot`	Outstanding / overdue / drafts / YTD position
`get_reminder_copy`	Your custom reminder email copy + schedule
`list_expenses`	A year's one-off expenses, and which have no receipt kept

Hours (timesheet:write)

Tool	What it does
`log_hours`	Add a timesheet entry (client default rate unless given)
`edit_hours`	Edit an entry (only the fields you pass change)
`delete_hours`	Delete an entry (blocked if on a sent/paid invoice)

Clients (clients:write)

Tool	What it does
`create_client` / `update_client` / `delete_client`	Client CRUD (delete blocked if it has projects/sent invoices)

Expenses (expenses:write)

Tool	What it does
`create_expense`	Add an expense as the receipt says it: total, Dutch btw, category (key or label). Your assistant can read the receipt; the photo itself is kept in the Peil app

Invoices (invoices:write)

Tool	What it does
`draft_invoice`	Draft an invoice from unbilled hours (summary / by_project / per_day)
`set_invoice_status`	Change status (e.g. mark paid) — does not email anyone
`update_invoice`	Edit safe fields (due date, payment date, notes)
`delete_invoice` / `archive_invoice`	Delete (paid ones blocked) / archive
`set_reminder_copy`	Write custom reminder email copy for one tone/language

Client-facing email (invoices:send — irreversible, always confirm first)

Tool	What it does
`send_invoice`	Email an invoice to the client now
`schedule_send`	Schedule a draft to be emailed at a future time
`cancel_scheduled_send`	Cancel a scheduled send
`send_reminder`	Email a payment reminder for a sent/overdue invoice

1. Create your key

In Peil: Settings → Developer → create a key with the permissions you want. Start with read + Log hours + Draft invoices (add Add expenses if you want your assistant to file receipts); leave Send invoices off unless you truly want an assistant emailing clients. You'll paste this key into your assistant's config as PEIL_API_KEY below.

2. Install the server

The easy way — no clone, no install:

uvx peil-mcp          # runs the latest release on demand

or, with pipx:

pipx run peil-mcp

→ Your launch command is uvx peil-mcp (or pipx run peil-mcp). Skip to step 3. Everything below is only needed if you're running from source (e.g. before the first release, or to hack on it).

From source

You need Python 3.11 or newer and a local copy of this mcp-server/ folder. Check your Python with python3 --version.

Which method? Run which uv pipx first. If you already have uv, use A —

it's the least work. If not, pipx (B) gives you a clean global command. If

you have neither and don't want to install tooling, the plain-venv path (C)

works with nothing but the Python that's already on your machine.

Everywhere below, replace /ABS/PATH/TO/mcp-server with the real absolute path to this folder (run pwd inside it to get it).

A. With `uv` (no install step)

uv builds and runs on demand — nothing to install first:

uv run --directory /ABS/PATH/TO/mcp-server peil-mcp

→ Your launch command is: uv run --directory /ABS/PATH/TO/mcp-server peil-mcp

Don't have uv? curl -LsSf https://astral.sh/uv/install.sh | sh (macOS/Linux) or pip install uv.

B. With `pipx` (isolated global command)

pipx installs the server into its own isolated environment and puts a peil-mcp command on your PATH:

pipx install /ABS/PATH/TO/mcp-server

→ Your launch command is simply: peil-mcp

Don't have pipx? python3 -m pip install --user pipx && python3 -m pipx ensurepath.

C. Plain `venv` + `pip` (works with only stock Python)

No extra tooling — just the python3 you already have:

cd /ABS/PATH/TO/mcp-server

python3 -m venv .venv .venv/bin/pip install .

→ Your launch command is: /ABS/PATH/TO/mcp-server/.venv/bin/peil-mcp (equivalently /ABS/PATH/TO/mcp-server/.venv/bin/python -m peil_mcp).

Use a plain pip install . (not -e/editable) for running. An editable

install relies on a .pth path hook that can silently fail to load on some

setups, giving ModuleNotFoundError: No module named 'peil_mcp'. Editable is

only needed if you're modifying the server itself — see

Local development.

3. Connect your assistant

The only thing that changes between assistants is where the config lives. Every MCP client needs the same three things:

command — your launch command from step 2
env — PEIL_API_KEY set to the key from step 1
(optional) `PEIL_API_URL` — only if you're pointing at a non-production Peil (see Local development); defaults to https://api.peil.app/api/v1.

The canonical config block (used by Claude Desktop, Cursor, Windsurf, Cline, and most others) looks like this — command + args are just your launch command split on spaces:

"mcpServers": { "peil": { "command": "peil-mcp", // or "uv", or the venv's python path "args": [], // e.g. ["run","--directory","/ABS/PATH/TO/mcp-server","peil-mcp"] for uv "env": { "PEIL_API_KEY": "your-key" } } } }

Claude Desktop

Edit claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), add the block above, and restart Claude Desktop.

Claude Code (CLI)

# pipx / venv (single-command launcher):

claude mcp add peil -e PEIL_API_KEY=your-key -- peil-mcp

uv:

claude mcp add peil -e PEIL_API_KEY=your-key -- uv run --directory /ABS/PATH/TO/mcp-server peil-mcp

Anything after -- is the launch command. Verify with claude mcp get peil (look for Status: ✔ Connected) and use /mcp in a session to reconnect.

Cursor

Add the canonical block to .cursor/mcp.json (this project) or ~/.cursor/mcp.json (all projects), then enable peil in Settings → MCP.

Windsurf

Add the canonical block to ~/.codeium/windsurf/mcp_config.json, then hit Refresh in the Cascade MCP panel.

Cline / Roo (VS Code)

Open the extension's MCP Servers → Configure panel and add the canonical block to cline_mcp_settings.json.

VS Code (native Copilot agent mode)

VS Code uses a slightly different shape — servers (not mcpServers) and an explicit type — in .vscode/mcp.json:

"servers": { "peil": { "type": "stdio", "command": "peil-mcp", "args": [], "env": { "PEIL_API_KEY": "your-key" } } } }

Any other MCP client

Give it the same command + args + `PEIL_API_KEY` env. The server speaks MCP over stdio; if a client can launch a stdio command, it can run Peil.

First prompts

Once connected, try:

*"Where do I stand?"* → orientation_snapshot
*"Log 6 hours to De Correspondent today for editing work."* → log_hours
*"Draft an invoice from my unbilled hours for De Correspondent."* → draft_invoice
*"Here's my train ticket, add it as an expense."* (with a photo) → create_expense

With Send invoices left off your key, an assistant can prepare everything but physically cannot email a client — you send from Peil yourself.

Local development

Point the server at a local backend with PEIL_API_URL:

PEIL_API_URL=http://localhost:8000/api/v1 PEIL_API_KEY=your-local-key peil-mcp

If you're modifying the server, an editable install picks up your changes without reinstalling:

.venv/bin/pip install -e ".[dev]"

Tests (mocked HTTP, no backend needed — pythonpath = ["src"] in pyproject.toml makes them independent of the install mechanism):

.venv/bin/pytest

Peil

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 Accounting, finance & taxi

Common questions

Alternatives

Finance Toolkit

SolidInvoice

Korea Tax Calculator

README from the maker

Peil MCP server

Draft-by-default

Tools

1. Create your key

2. Install the server

or, with pipx:

From source

A. With uv (no install step)

B. With pipx (isolated global command)

C. Plain venv + pip (works with only stock Python)

3. Connect your assistant

Claude Desktop

Claude Code (CLI)

uv:

Cursor

Windsurf

Cline / Roo (VS Code)

VS Code (native Copilot agent mode)

Any other MCP client

First prompts

Local development

A. With `uv` (no install step)

B. With `pipx` (isolated global command)

C. Plain `venv` + `pip` (works with only stock Python)