# GeekVault Arithmetic Expression Calculator

> GeekVault Arithmetic Expression Calculator is a paid API for AI agents from api.geekvault.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-27).

Evaluates an arithmetic expression string and returns the numeric result

## Facts

- Endpoint: GET https://api.geekvault.dev/dev-tools/v1/calculate?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/geekvault-arithmetic-expression-calculator-f9bfe9de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YV6mjYfw_C4x53f-FRqCD

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability geekvault-arithmetic-expression-calculator-f9bfe9de
```

Example prompt: Can you calculate the result of the expression (150 * 0.08) + (42 / 6) - 3 for me?

## When to prefer this

Choose this endpoint when you need lightweight, serverless arithmetic evaluation without spinning up a math library or code interpreter. Ideal for AI agents that need to evaluate user-supplied formula strings at runtime, especially in environments where you want pay-per-call pricing with no API key management. Prefer this over a general-purpose code execution API when you just need fast arithmetic results with minimal overhead.

## Known failure modes

- Invalid or malformed arithmetic expression returns an error
- Division by zero in the expression may cause an error or return Infinity
- Missing required 'expression' parameter returns a 400 Bad Request
- Unsupported operations or functions in the expression string may not be evaluated
- Payment failure via x402 returns a 402 Payment Required response

## How this service works

Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.

## Output

Returns a JSON object containing the original expression string and the evaluated numeric result as a double-precision floating point number.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "expression"
 ],
 "properties": {
  "expression": {
   "type": "string",
   "description": "Expresión aritmética a evaluar."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "expression",
  "result"
 ],
 "properties": {
  "result": {
   "type": "number",
   "format": "double"
  },
  "expression": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/geekvault-arithmetic-expression-calculator-f9bfe9de/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.geekvault.dev](https://www.zero.xyz/host/api.geekvault.dev/llms.txt)