Authentication

Nansen account API calls accept a selected nansen:api browser session or conventional API key with the same permissions. NANSEN_API_KEY takes precedence; optional primaryEnv preserves configured-key injection. Run nansen auth status for offline selection. Cached access expiry alone permits automatic renewal during an authorized task. Stop on anonymous selection, invalid state, blocked/uncertain renewal or actual auth failure; never drop a credential or fall back to anonymous x402 payment. Browser login does not grant wallet signing, privileged service identity or a persistent MCP integration key. Preserve all confirmation, signing, sanctions and geographic checks below. Browser login is available in CLI 2.0.0 within the macOS arm64 preview scope.

Limit Orders

Use this skill when the user wants a price-triggered order. There are two distinct paths — pick the one that matches the user's chain:

• Solana → native limit orders. nansen trade limit-order create|list|cancel|update places real resting orders through the Nansen trading API. Use these for anything on Solana.
• Other chains → alert-based approximation. nansen-cli does not yet place native limit orders on EVM chains. Place the resting order on the venue that supports it (CEX, DEX limit-order product) and create a companion common-token-transfer smart alert on the settlement wallet as a best-effort fill signal.