---
id: "hio"
type: "repository"
type_label: "Repositories"
title: "hio (asynchronous I/O for keripy)"
maintainer: "ioflo"
authors: []
date: null
year: null
reading_level: "implementer"
reading_level_label: "Implementer"
reading_level_meaning: "developers working in or against the code"
evidence: "code"
evidence_meaning: "a repository or its documentation; what the code does can be checked"
status: "active"
status_meaning: "changed within the last six months, or a live service"
access: "public"
access_meaning: "anyone with the link"
topics:
  - "implementations"
  - "infrastructure"
roles:
  - "developer"
  - "security-architect"
  - "infrastructure-operator"
source_url: "https://github.com/ioflo/hio"
source_license: "Apache-2.0"
source_license_note: null
found_on: null
kerisse_credit: false
abstract_license: "CC BY 4.0"
abstract_license_url: "https://creativecommons.org/licenses/by/4.0/"
abstract_attribution: "KSKB, the KERISuite Knowledge Base (https://kskb.dev/)"
last_checked: "2026-10-15"
kskb_url: "https://kskb.dev/cards/hio/"
kskb_app_url: "https://kskb.dev/#item/hio"
kskb_record_url: "https://kskb.dev/data/kskb/resources/hio"
kskb_markdown_url: "https://kskb.dev/export/cards/hio.md"
---

# hio (asynchronous I/O for keripy)

The hierarchical asynchronous I/O library keripy and KERIA are built on (doers, doists and the event loop). Development is at ioflo/hio; the WebOfTrust/hio copy stopped at 0.5.7 in July 2024.

Labels: reading level Implementer; evidence code (a repository or its documentation; what the code does can be checked).
Source: https://github.com/ioflo/hio (license Apache-2.0).
The abstract is KSKB's own text under Creative Commons Attribution 4.0 (CC BY 4.0), https://creativecommons.org/licenses/by/4.0/; credit KSKB, the KERISuite Knowledge Base (https://kskb.dev/).