# PrimeAPI Speed Unit Converter

> PrimeAPI Speed Unit Converter is a paid API for AI agents from prime-api-seven.vercel.app, paid per call via x402, $0.125741/call, status unknown (last checked 2026-09-14).

Converts speed values between different units of measurement (e.g. mph, km/h, m/s, knots)

## Facts

- Endpoint: POST https://prime-api-seven.vercel.app/api/tools/convert/speed
- Price: $0.125741/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/primeapi-speed-unit-converter-f0e28b57
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vzh4VbTI4ngVndRXacRT3

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 primeapi-speed-unit-converter-f0e28b57 -d '<json body>'
```

Example prompt: Convert 60 miles per hour to kilometers per hour for me.

## When to prefer this

Use this endpoint when an AI agent needs to convert speed values between common units (mph, km/h, m/s, knots, ft/s) on a per-call pay-as-you-go basis with no API key setup required, particularly in workflows involving transportation data, physics calculations, or international unit normalization.

## Known failure modes

- Unsupported unit type returns error or empty result
- Malformed query string fails to parse source or target unit
- Non-numeric speed value causes computation error
- Missing unit specification results in ambiguous or failed conversion
- Service unavailability or payment failure returns 402 or 5xx error

## 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 speed value in the requested target unit, along with relevant conversion metadata such as the original value, source unit, and result unit.

## 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/primeapi-speed-unit-converter-f0e28b57/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prime-api-seven.vercel.app](https://www.zero.xyz/host/prime-api-seven.vercel.app/llms.txt)