# ApexAPI Volume Unit Converter

> ApexAPI Volume Unit Converter is a paid API for AI agents from apex-api-gamma.vercel.app, paid per call via x402, $0.169016/call, status unknown (last checked 2026-10-11).

Converts a volume measurement from one unit to another (e.g., liters to gallons, milliliters to cubic inches)

## Facts

- Endpoint: POST https://apex-api-gamma.vercel.app/api/tools/convert/volume?utm_source=zero.xyz
- Price: $0.169016/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/apexapi-volume-unit-converter-fadd4ae9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DH4-wVnUt6WnQ00iLDuGx

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 apexapi-volume-unit-converter-fadd4ae9 -d '<json body>'
```

Example prompt: Convert 5.5 liters to US gallons for me.

## When to prefer this

Use this endpoint when you need a quick, pay-per-call volume unit conversion without setting up API keys. Ideal for agents that need to convert between metric and imperial volume units on demand, especially when already using other ApexAPI endpoints on the same platform.

## Known failure modes

- Unrecognized unit names return an error or null result
- Missing or malformed query string returns a 400 error
- Ambiguous unit abbreviations may produce unexpected conversions
- Payment failure in USDC returns a 402 error before any conversion is performed

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns the converted volume value in the requested target unit, along with the original input value and units used in the conversion.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apexapi-volume-unit-converter-fadd4ae9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apex-api-gamma.vercel.app](https://www.zero.xyz/host/apex-api-gamma.vercel.app/llms.txt)