Kraken REST Skill

Use this skill to run Kraken public market-data operations through uxc + OpenAPI.

Reuse the uxc skill for shared execution, auth, and error-handling guidance.

Prerequisites

• uxc is installed and available in PATH.
• Network access to https://api.kraken.com.
• Access to the curated OpenAPI schema URL:
• https://raw.githubusercontent.com/holon-run/uxc/main/skills/kraken-openapi-skill/references/kraken-public.openapi.json

Scope

This skill covers a curated Kraken public surface for:

• server time
• asset pair metadata
• ticker reads
• OHLC candles
• order book snapshots

This skill does not cover:

• private account or trade endpoints in v1
• Kraken FIX
• broader non-core platform products

Authentication

Public market endpoints in this skill do not require credentials.

Kraken private REST endpoints use provider-specific header signing and nonce handling. Keep this v1 skill public-data-only until a reusable Kraken signer flow exists in uxc.

Core Workflow

1. Use the fixed link command by default:
• command -v kraken-openapi-cli
• If missing, create it:

uxc link kraken-openapi-cli https://api.kraken.com --schema-url https://raw.githubusercontent.com/holon-run/uxc/main/skills/kraken-openapi-skill/references/kraken-public.openapi.json

• kraken-openapi-cli -h

1. Inspect operation help before execution:
• kraken-openapi-cli get:/0/public/Time -h
• kraken-openapi-cli get:/0/public/Ticker -h

1. Prefer narrow pair reads first:
• kraken-openapi-cli get:/0/public/Ticker pair=XBTUSD
• kraken-openapi-cli get:/0/public/Depth pair=XBTUSD count=20

Operations

• get:/0/public/Time
• get:/0/public/AssetPairs
• get:/0/public/Ticker
• get:/0/public/OHLC
• get:/0/public/Depth

Guardrails

• Keep automation on the JSON output envelope; do not use --text.
• Parse stable fields first: ok, kind, protocol, data, error.
• Treat this v1 skill as read-only.
• Kraken pair naming can differ from other venues. Check AssetPairs before assuming symbol strings.
• kraken-openapi-cli ... is equivalent to uxc https://api.kraken.com --schema-url ....

References

• Usage patterns: references/usage-patterns.md
• Curated OpenAPI schema: references/kraken-public.openapi.json
• Official Kraken API intro: https://docs.kraken.com/api/docs/guides/global-intro