# WHATPORT(10010)

## NAME

port 10010 — rxapi — ooRexx's rxapi daemon — a local IPC broker that starts itself and quietly holds a socket open.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA assigns 10010/tcp to rxapi, the Open Object Rexx API daemon. It brokers queues, the macrospace, and registered external functions for ooRexx programs, and the interpreter starts it automatically the first time a script needs it — which is why it appears on machines nobody thinks of as ooRexx hosts. The matching UDP entry is Reserved. Nmap sees the port open on about 0.29% of scanned hosts, unusually high for a niche runtime service.

## EXPOSURE

**Do not expose.** rxapi is designed as a local IPC broker between processes on one machine, not as a network service. If it is answering from off-box, bind it back to the loopback interface.

## CHECK

```sh
sudo lsof -nP -iTCP:10010 -sTCP:LISTEN
```

## SEE ALSO

- docs — [Open Object Rexx (ooRexx) — project site](https://www.oorexx.org/) (oorexx.org)
- iana — [IANA port registry — 10010 (rxapi)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=10010) (iana.org)

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HTML: <https://whatport.net/10010/> · JSON: <https://whatport.net/10010.json> · full dataset: <https://whatport.net/ports.json>