Password Entropy Calculator

Entropy bits and strength from password length and character pool.

Free tier eligible — 500 calls/month with a free key from /pricing; x402 pay-per-call above quota.

Parameters

Parameter	Type	Required	Description
`length`	integer	required	Password length in characters
`charset_size`	integer	optional	Explicit character pool size (overrides flags below)
`lowercase`	boolean	optional	Include lowercase a-z (26)
`uppercase`	boolean	optional	Include uppercase A-Z (26)
`digits`	boolean	optional	Include digits 0-9 (10)
`symbols`	boolean	optional	Include symbols (~32)

Call it over MCP (JSON-RPC 2.0)

curl -s https://wingmanprotocol.com/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": {"name": "password_entropy", "arguments": {"length": 20}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/password_entropy \
  -H 'Content-Type: application/json' \
  -d '{"length": 20}'

Try it live

Edit the JSON and run it — this POSTs to https://wingmanprotocol.com/tools/password_entropy from your browser.

This tool is x402-metered — agents pay per call with USDC on Base. The 402 response below is the standard x402 payment-requirements envelope: sign the EIP-3009 authorization and retry with the X-Payment header, or get a free key at /pricing (500 calls/month, no card, no crypto).