Nansen Agent Guide

This is a routing guide that helps Claude decide whether to use Nansen's AI agent or direct CLI commands for blockchain research queries. The core logic is simple: use the agent (200-750 credits) for analysis and interpretation like "what's happening with smart money," and use direct CLI commands (5-50 credits) for raw data like token screeners or wallet balances. The anti-patterns section is the most useful part, especially the reminder that chaining multiple agent calls is wasteful. If you're building anything that touches Nansen's API, this saves you from burning credits on the wrong tool for the job.

skills.sh installs: 240
GitHub stars: 148
last updated: Aug 21, 2026

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Install

$ npx -y skills add nansen-ai/nansen-cli --skill nansen-agent-guide --agent claude-code

Installs into .claude/skills of the current project.

Files

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 enabled in production within the documented platform scope.

Agent vs CLI Routing

Public agent fast/expert and direct API commands accept the selected nansen:api browser session or conventional API key under the same account permissions.

SKILL.md on GitHub

Details

Repository: github.com/nansen-ai/nansen-cli
Categories: Documentation, AI & Agent Building, Data Science & ML, CLI & Terminal
First seen: Jun 3, 2026

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