Kraken Shared

kraken-shared

This tool is experimental. Commands execute real financial transactions on the Kraken exchange. Test with kraken paper before using real funds. See DISCLAIMER.md for full terms.

Invocation Contract

Always call:

kraken <command> [args...] -o json 2>/dev/null

Rules:

• Parse stdout only.
• Treat stderr as diagnostics.
• Exit code 0 means success.
• Non-zero exit means failure with JSON envelope in stdout.
• Streaming commands (session start, record, ws, streamd) emit JSONL: match lines by their "type" field (e.g. scan for "type":"session_started" to get the session handle) — never assume a line position, because live market frames interleave on stdout.
• Probe capability, not version, at the start of a loop: kraken session --help >/dev/null 2>&1 exits 0 on a build that speaks this contract and 2 on an older one — kraken --version cannot tell them apart across a vocabulary change.
• Market-data field names are readable (last_price, not c[0]). Only ticker still keys on Kraken's INTERNAL pair name (XXBTZUSD, not BTCUSD) — reach its fields with .[] or to_entries, never a hardcoded key. ohlc/trades/spreads reshape to {pair, …}: fold the named row array (.candles/.trades/.spreads) directly, never the whole object — ohlc keeps a sibling last cursor that poisons naive iteration. orderbook drops the wrapper to top-level .asks/.bids.
• Validate every number a READ produces before it gates an order or lands in a reason. On an empty or failed read, record kraken session note --kind alert --reason "READ failed: ..." and end the step — never interpolate a failed read into a reason, or the decision log fills with plausible-looking false evidence.

Authentication

export KRAKEN_API_KEY="your-key"
export KRAKEN_API_SECRET="your-secret"

Optional futures credentials:

export KRAKEN_FUTURES_API_KEY="your-futures-key"
export KRAKEN_FUTURES_API_SECRET="your-futures-secret"

Public market data and paper trading require no credentials.

Error Routing

Route on .error:

• auth: re-authenticate
• rate_limit: read suggestion and docs_url fields, adapt strategy
• network: retry with exponential backoff
• validation: fix inputs, do not retry unchanged request
• api: inspect request parameters

Safety

The catalog marks 41 commands as dangerous: true. Always check the dangerous field in agents/tool-catalog.json before executing a command.

Require explicit human approval before:

• live buy or sell orders (spot and futures)
• order amendments, edits, and batch operations
• cancel and cancel-all operations
• withdrawals and wallet transfers
• earn allocate/deallocate
• subaccount transfers
• WebSocket order mutations

Use paper trading for dry runs:

kraken workspace create sandbox --capital 10000 --mode paper -o json
export KRAKEN_WORKSPACE=sandbox

If you hit a mismatch between what you are trying to do and the CLI's interface or responses — including a mismatch between this skill and the installed CLI version's contract — feel free to submit feedback with kraken feedback.