# Avail

> Avail Node—run chains, Kate RPC for data availability, block authoring, and runtime APIs for DA tooling.

- Skill: `hairyf/avail` (Agent Skill, multi-file: 5 files)
- Install (CLI): `npx skillmds@latest add hairyf/avail`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hairyf/avail/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: hairyf (https://skillmd.com/u/hairyf)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/hairyf/avail

---


> Skill based on Avail Node (availproject/avail), generated from `sources/avail`. Doc path: `sources/avail/README.md`, `sources/avail/client/basic-authorship/README.md`, `sources/avail/e2e/README.md`, and node/rpc/runtime source (cli, command, kate-rpc, apis).

Avail is a data-availability layer. The Avail Node is the official Substrate-based client. It supports multiple chains (dev, turing, mainnet), Kate RPC for DA queries (rows, proofs, block length, per-tx data proof), and optional custom block authoring via the basic-authorship client. Use this skill to run nodes, script Kate RPC, integrate with light clients or explorers, and reason about runtime APIs.

## Core References

| Topic | Description | Reference |
|-------|-------------|-----------|
| Node and chains | Run node, chain IDs (dev, turing, mainnet), Docker, custom chain spec | [core-node-and-chains](references/core-node-and-chains.md) |
| Kate RPC | Enable Kate RPC, methods (queryRows, queryProof, queryMultiProof, blockLength, queryDataProof), limits | [core-kate-rpc](references/core-kate-rpc.md) |

## Features

### Block authoring and runtime

| Topic | Description | Reference |
|-------|-------------|-----------|
| Block authoring | ProposerFactory and Proposer for custom block production (basic-authorship) | [features-block-authoring](references/features-block-authoring.md) |
| Runtime APIs | DataAvailApi, KateApi, ExtensionBuilder for DA and header extension | [features-runtime-apis](references/features-runtime-apis.md) |

## Best Practices

| Topic | Description | Reference |
|-------|-------------|-----------|
| Node security | Binary verification, safe RPC usage, when to use unsafe/Kate flags | [best-practices-node-security](references/best-practices-node-security.md) |