Tip calculator API: tip, total and split per person

$0.001 per call with a key ($0.01 paid per call from a wallet) · failed calls are never charged · no account needed: a card key or USDC

Tip and total for a bill at a tip percentage, split between any number of people, optionally rounding each share up to the next whole amount. Use for receipts, expense apps and group payments.

When to use it

Add a tip percentage to a bill and get the total
Split the total between several people
Round each share up to a whole amount

Run it free (3 free calls) Buy credits by card (from $1) Example result (JSON)

$0.001 per call with prepaid credits: $1 by card pays for 1,000 calls, with no account and no subscription.

Inputs

Name	Type	Description
`bill` (required)	number	Bill amount before tip
`percent`	number	Tip percent, 0-100 (default 15)
`people`	integer	People sharing, 1-100 (default 1)
`roundUp`	string	true to round each share up to a whole amount

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://glyphcall.com/calc/tip?bill=84.5"

Or one of your 3 free calls, no key:

curl "https://glyphcall.com/calc/tip?bill=84.5&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "bill": 84.5,
  "percent": 18,
  "tip": 15.21,
  "total": 99.71,
  "people": 3,
  "perPerson": 33.24
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is calc_tip, and the first 25 successful calls are free:

https://glyphcall.com/mcp

Questions

What is the default tip?

15% unless you pass percent.

How many people can share?

From 1 to 100.

How do I pay?

Each successful call costs $0.01; failed calls are not charged. The first 3 calls are free (25 through an MCP client). Then pay with card credits (from $1; the key goes in an Authorization header or, for clients that can only fetch a URL, as api_key= in the URL) or per call in USDC over x402 or MPP. No account is needed.