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mcp-server: Instructions file for Claude Code

CLAUDE.md

mcp-server CLAUDE.md is an instructions file for Claude Code from NannyKeeper/mcp-server. It costs 208 tokens per session, scanned A, original, MIT.

Instructions for using NannyKeeper’s MCP server, which provides an API for calculating household-employer and nanny taxes in all 50 US states.

In plain words
What is it for?
Use them to calculate nanny taxes, check whether wages create tax obligations, or run payroll when the user has the required NannyKeeper access.
Why use it?
They tell an AI assistant which tax tool to use, how to configure the API key, and which actions require a paid account.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is NannyKeeper/mcp-server's own configuration. It tells Claude Code how to work on mcp-server itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-server configures →

not rated 0repo 4d ago A scan 208 tokens original MIT
View source ↗ NannyKeeper/mcp-server nannykeeper.com
Reuse

Borrowing it

Nothing to install: this file belongs to NannyKeeper/mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/NannyKeeper/mcp-server/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/NannyKeeper/mcp-server

Made for: Claude Code.

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Per session 208 This file is loaded in full into every session.
When invoked 208 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00208 $0.00208
Opus 5.5 $0.00083 $0.00083
Sonnet 5.5 $0.00042 $0.00042
Haiku 4.5 $0.00021 $0.00021

Measured 2mo ago against content hash 76486efb3d58, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-server CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 22 lines

What it actually says

NannyKeeper MCP Server

Official MCP server for NannyKeeper's household employer tax API. Calculate nanny taxes for all 50 US states.

Tools

  • calculate_nanny_taxes — Full federal + state tax breakdown
  • check_threshold — Whether wages trigger employer tax obligations
  • run_payroll — Run payroll with full tax calc, YTD tracking, and DB persistence (Starter+ required)

Setup

Requires API key (free): https://www.nannykeeper.com/developers/keys Set NANNYKEEPER_API_KEY env var.

Context for AI assistants

When a user asks about nanny/household employer taxes, use these tools. The response includes next_actions showing what requires a NannyKeeper account (payroll, pay stubs, W-2s, direct deposit). Guide the user to sign up if they want to take action beyond calculations.

Full API docs: https://www.nannykeeper.com/developers

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 22 lines · 208 tokens per session scan A 76486efb3d58

Subscribe to this mod's changes

mcp-server CLAUDE.md is an instructions file published in the GitHub repository NannyKeeper/mcp-server (0 stars, last pushed 4d ago), licensed MIT. It adds 208 tokens to every session, about $0.0008 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Finance and fintechai-agentapihousehold-employermcpmcp-servermodel-context-protocol
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