# Kilometers per Hour to Mach Converter

> Kilometers per Hour to Mach Converter is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Converts a numeric speed value from kilometers per hour (km/h) to Mach number via a simple GET request.

## Facts

- Endpoint: GET https://agent402.tools/api/convert/kilometers-per-hour-to-mach
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kilometers-per-hour-to-mach-converter-94f0ec9b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cEhI4_1w_s59A-iz_3V3A

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 kilometers-per-hour-to-mach-converter-94f0ec9b
```

Example prompt: What is 1200 kilometers per hour in Mach? Can you convert that speed for me?

## When to prefer this

Use this endpoint when you need a quick, programmatic conversion of a speed value from km/h to Mach number, particularly in aviation, aerospace, or physics contexts. Prefer this over manual calculation when automating unit conversion in agent workflows that handle speed data in metric units and need Mach equivalents.

## Known failure modes

- Missing 'value' query parameter returns an error or 400-level response
- Non-numeric value string causes a parsing or validation error
- Very large or negative values may return unexpected results or errors
- Service unavailability or timeout returns a 5xx error
- Payment not processed (x402) results in a 402 Payment Required response

## How this service works

Convert kilometers per hour to mach (speed). Pass ?value=N.

## Output

Returns the Mach number equivalent of the input speed given in kilometers per hour — a numeric value indicating how many times the speed of sound the input represents.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "value"
     ],
     "properties": {
      "value": {
       "type": "string",
       "description": "Numeric value to convert"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kilometers-per-hour-to-mach-converter-94f0ec9b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)