# MLB Umpires Roster API

> MLB Umpires Roster API is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns the MLB umpire roster for a sport, including umpire names, jersey numbers, and job titles.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/mlb-umpires
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mlb-umpires-roster-api-bd34878f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I14ZcGMxjEi47qa1HJ6Uy

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 mlb-umpires-roster-api-bd34878f -d '<json body>'
```

Example prompt: Can you pull up the current MLB umpire roster — I want to see all the umpires, their jersey numbers, and their official job titles?

## When to prefer this

When you need structured data about MLB umpires including names, jersey numbers, and official job titles sourced from the MLB StatsAPI. Prefer this over scraping MLB web pages or searching for umpire info manually.

## Known failure modes

- Invalid or missing sport id returns empty or error response
- API returns HTTP 402 if payment not included
- Malformed query parameter may return no results
- Upstream MLB StatsAPI unavailability causes failure

## How this service works

MLB StatsAPI: umpire roster for a sport id - umpire name, jersey number, job title. Query: ?q= Returns JSON.

## Output

A JSON object containing the MLB umpire roster, with each entry including the umpire's name, jersey number, and job title (e.g. home plate umpire, first base umpire).

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mlb-umpires-roster-api-bd34878f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)