Math expression calculator: evaluate a formula safely

$0.01 per call · failed calls are never charged · no account or API key needed

Evaluate an arithmetic expression safely (parsed, never executed as code): + - * / % ^ and **, parentheses, factorial !, constants pi, e and tau, and functions sqrt, cbrt, abs, round, floor, ceil, exp, ln, log (base 10), log2, sin, cos, tan, asin, acos, atan (radians), min, max and pow. Up to 500 characters. Use when an agent needs exact arithmetic instead of guessing, for prices, unit maths or formulas.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Try it with your own inputs

The expression, such as (2+3)*4^2/sqrt(16)

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
expression (required)stringThe expression, such as (2+3)*4^2/sqrt(16)

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/math/evaluate?expression=(1500%20*%200.045%20%2F%2012)%20%2B%20sqrt(144)%20-%202%5E3"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/math/evaluate?expression=(1500%20*%200.045%20%2F%2012)%20%2B%20sqrt(144)%20-%202%5E3&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

{
  "expression": "(1500 * 0.045 / 12) + sqrt(144) - 2^3",
  "value": 9.625,
  "finite": true
}

From an AI agent (MCP)

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

https://agent-data-tools.revmesh2074.workers.dev/mcp

Related tools