Finance Toolkit
500+ transparent financial methods calculated from raw statements, not third-party endpoints.
Computer or cloud
Token Lens
Overview
Description from the maker (original English)
Context window token analysis and budget management
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
- UsageiVery new↓ 58/wk · ★ –
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
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).
- The registry lists no key to fill in.
You need
- npmNode.js installed (for the npx command)
Which app do you use?
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": {
"token-lens": {
"command": "npx",
"args": [
"-y",
"token-lens-mcp"
]
}
}
}Run this in your terminal
claude mcp add token-lens -- npx -y token-lens-mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"token-lens": {
"command": "npx",
"args": [
"-y",
"token-lens-mcp"
]
}
}
}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.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"token-lens": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"token-lens-mcp"
]
}
}
}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.
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 9, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account mdfifty50-boop, 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 Accounting, finance & taxi
- More stars than 0% of the other 2959 servers in this category
- Published to the registry more recently than 5% of the other 2959 servers in this category
- Basic checks equal to or better than 100% of the other 2959 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 Token Lens 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?
The registry does not list a required key, though some servers ask you to sign in on first use.
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 (0.1.2) reached the registry 7 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: Finance Toolkit, SolidInvoice, Korea Tax Calculator
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
SolidInvoice
Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.
Runs in the cloud✓ solidinvoice.co
Korea Tax Calculator
Korean tax calculation and tax-audit judgment MCP: 96 tools with statutory citations.
Runs on your computer
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.
token-lens-mcp
MCP server for analyzing and optimizing context window token usage. MCP tool definitions consume 40-72% of context windows before any user work begins — this server helps you measure, compress, and eliminate that waste.
Install
npx token-lens-mcpClaude Desktop
Add to claude_desktop_config.json:
{"mcpServers": { "token-lens": { "command": "npx", "args": ["token-lens-mcp"] } } }
Claude Code
claude mcp add token-lens -- npx token-lens-mcpTools
audit_context_budget
Analyze the token cost of your MCP tool definitions. Estimates tokens per tool using chars/4 approximation on the full JSON definition.
Params:
tools— Array of{name, description, schema}objects
Returns: Per-tool token cost (sorted by cost), total tokens, percentage of 128K/200K/1M context windows.
optimize_tool_loading
Given a task description, recommend the minimal set of tools needed. Uses keyword matching and category relevance scoring.
Params:
task_description— What you're trying to accomplishavailable_tools— Array of{name, description, category?}
Returns: Recommended tools sorted by relevance, excluded tools, estimated tokens saved.
compress_schema
Compress verbose tool schemas to reduce token usage.
Params:
tool_name— Name of the toolschema— JSON Schema object to compresslevel—"light"|"medium"|"aggressive"
Levels:
- light — Remove descriptions under 20 chars
- medium — Shorten descriptions to 50 chars, remove examples
- aggressive — Strip all descriptions, keep only types and required fields
Returns: Compressed schema, original/compressed token counts, savings percentage.
analyze_session_usage
Track which tools are actually called vs loaded during a session.
Params:
session_id— Unique session identifieraction—"register_tool"|"log_call"|"report"tool_name— Tool name (required for register_tool/log_call)tool_tokens— Token cost (for register_tool, default 50)
Report returns: Loaded vs used counts, waste percentage, unused tools ranked by token cost.
suggest_removals
Identify tools that can be safely removed based on usage patterns.
Params:
usage_history— Array of{tool_name, call_count, last_used_days_ago}
Scoring: never_used (priority 3) > not_used_30_days (priority 2) > rarely_used (priority 1)
Returns: Removal candidates with reasons and estimated token savings.
get_optimization_report
Full context window health check combining audit, removal suggestions, and compression recommendations.
Params:
tools— Array of tool definitionsusage_history— Optional usage history array
Returns: Executive summary with health grade (excellent/good/fair/poor), audit results, removal suggestions, compression opportunities, and actionable recommendations.
Resources
token-lens://tips
Best practices guide for reducing MCP context window bloat, including schema design tips, token budget guidelines, and dynamic tool loading strategies.
Development
npm installnpm test npm run dev # watch mode
License
MIT