PNL Toolkit

by pnltoolkit.com · remote · no sign-in to list tools · v1.1.0 · published by com.pnltoolkit

Eight free investment and trading calculators with PNG charts and editable result links.

Changes · 8

Compare Registry entry

8 tools: 8 change things.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things8Claude Code: ask: see these tools
Only reads0Claude Code: allow

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http calculators https://pnltoolkit.com/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

8 tools

Changes things 8Creates or changes something that can be changed back.Claude Code: ask

compound_interestCompound interest in USD: initial dollars, monthly dollars, annual return/fees/inflation in percent, and whole years.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Compound interest in USD: initial dollars, monthly dollars, annual return/fees/inflation in percent, and whole years. Creates a free calc-compound PNG. Returns results, conditions, assumptions, an editable link, share page and PNG. No account access or order execution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
dca_backtestDollar-cost-averaging backtest using installed monthly closes, not live quotes.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Dollar-cost-averaging backtest using installed monthly closes, not live quotes. Asset ticker, start/end months YYYY-MM, initial deposit in USD, monthly in USD per purchase, frequency in months (1, 3 or 12), buying fee in percent, optional benchmark and total/price return basis. Initial deposit and first recurring purchase occur at the selected start month-end. Omitted dates use calculator defaults clamped to coverage. Returns data metadata and the free calc-dca PNG. Returns results, conditions, assumptions, an editable link, share page and PNG. No account access or order execution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
drawdown_recoveryDrawdown recovery: balances/deposits in USD, drawdown and monthly return in percent, target horizon in whole months.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Drawdown recovery: balances/deposits in USD, drawdown and monthly return in percent, target horizon in whole months. Returns results, conditions, assumptions, an editable link, share page and PNG. No account access or order execution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
historical_returnHistorical investment return using installed monthly closes, not live quotes.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Historical investment return using installed monthly closes, not live quotes. Asset ticker, start/end months YYYY-MM, amount in USD (unit=cash) or historical shares/coins (unit=coins), buying fee in percent, optional benchmark and total/price return basis. Omitted dates use calculator defaults clamped to asset/benchmark coverage. Returns data coverage/source metadata and the free calc-return PNG. Returns results, conditions, assumptions, an editable link, share page and PNG. No account access or order execution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
inventory_quotesInventory quotes: mid and tick in USD, inventory weights in percent, spread/skew/cap in basis points.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Inventory quotes: mid and tick in USD, inventory weights in percent, spread/skew/cap in basis points. Skew is bps per 10 percentage points of inventory deviation. Returns results, conditions, assumptions, an editable link, share page and PNG. No account access or order execution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
position_sizePosition sizing for linear USD shares/coins: prices in USD, account risk in percent, fees/slippage in basis points, quantity increment in units.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Position sizing for linear USD shares/coins: prices in USD, account risk in percent, fees/slippage in basis points, quantity increment in units. Returns results, conditions, assumptions, an editable link, share page and PNG. No account access or order execution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
spread_and_feesRound-trip spread economics: one-side notional in USD; full spread, fee per fill and adverse cost in basis points (1 bp = 0.01%).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Round-trip spread economics: one-side notional in USD; full spread, fee per fill and adverse cost in basis points (1 bp = 0.01%). Negative fees are rebates. Returns results, conditions, assumptions, an editable link, share page and PNG. No account access or order execution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
trade_expectancyTrade expectancy and fractional Kelly: balance in USD, win rate/buffer/cap in percent, wins/losses/cost in R, fraction 0–1.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Trade expectancy and fractional Kelly: balance in USD, win rate/buffer/cap in percent, wins/losses/cost in R, fraction 0–1. Returns results, conditions, assumptions, an editable link, share page and PNG. No account access or order execution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http calculators https://pnltoolkit.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__calculators__historical_return",
      "mcp__calculators__dca_backtest",
      "mcp__calculators__compound_interest",
      "mcp__calculators__position_size",
      "mcp__calculators__trade_expectancy",
      "mcp__calculators__drawdown_recovery",
      "mcp__calculators__spread_and_fees",
      "mcp__calculators__inventory_quotes"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as calculators. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.pnltoolkit/calculators/changes.xml

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Anlyon alternative

8 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Source: MCP Registry. Synced Oct 21, 2026, 18:00 UTC.

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