Number to Words

Spell an integer, or a currency amount (check-writing), in English words.

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

Parameters

Parameter	Type	Required	Description
`mode`	string	optional	Output style One of: integer, currency
`number`	integer	optional	Integer to spell (integer mode)
`amount`	number	optional	Decimal amount to spell as currency (currency mode)

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": "number_to_words", "arguments": {"mode": "integer", "number": 10, "amount": 1000}}}'

Or plain HTTP

curl -s https://wingmanprotocol.com/tools/number_to_words \
  -H 'Content-Type: application/json' \
  -d '{"mode": "integer", "number": 10, "amount": 1000}'

Try it live

Edit the JSON and run it — this POSTs to https://wingmanprotocol.com/tools/number_to_words 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).