Nansen CLI

Built by agents, for agents. Command-line interface for the Nansen API, designed for AI agents.

Installation

npm install -g nansen-cli
npx skills add nansen-ai/nansen-cli  # load agent skill files

Auth

nansen login --api-key <key>   # save key to ~/.nansen/config.json
nansen login --human           # interactive prompt
export NANSEN_API_KEY=...      # env var (highest priority)
nansen logout                  # remove saved key

Get your API key at app.nansen.ai/auth/agent-setup.

Commands

nansen research <category> <subcommand> [options]
nansen agent "<question>"             # AI research agent (200 credits, Pro)
nansen agent "<question>" --expert    # deeper analysis (750 credits, Pro)
nansen trade <subcommand> [options]
nansen wallet <subcommand> [options]
nansen schema [command] [--pretty]    # full command reference (no API key needed)

Research categories: smart-money (sm), token (tgm), profiler (prof), portfolio (port), prediction-market (pm), search, perp, points

Trade: quote, execute, bridge-status — DEX swaps on Solana and Base, including cross-chain bridges.

Wallet: create, list, show, export, default, delete, send — local or Privy server-side wallets (EVM + Solana).

Run nansen schema --pretty for the full subcommand and field reference.

Trading

DEX swaps on solana and base. Two-step: quote then execute.

nansen trade quote --chain solana --from SOL --to USDC --amount 1000000000
nansen trade execute --quote <quoteId>

Amounts are in base units (lamports, wei). Common symbols (SOL, ETH, USDC, USDT) resolve automatically. A wallet is required — set one with nansen wallet default <name>.

Wallet

nansen wallet create --name my-wallet        # local keypair (EVM + Solana)
nansen wallet create --name my-wallet --provider privy  # server-side via Privy
nansen wallet list
nansen wallet default <name>
nansen wallet send --wallet <name> --to <addr> --amount <n> --chain <chain>

Local wallets are password-encrypted. Set NANSEN_WALLET_PASSWORD to skip the prompt.

Privy wallets are server-side — no password, no local key storage. Requires PRIVY_APP_ID and PRIVY_APP_SECRET env vars. Get credentials at dashboard.privy.io.

Key Options

| Option | Description | |--------|-------------| | --chain <chain> | Blockchain to query | | --limit <n> | Result count | | --timeframe <tf> | Time window: 5m 1h 6h 24h 7d 30d | | --fields <list> | Comma-separated fields (reduces response size) | | --sort <field:dir> | Sort results, e.g. --sort value_usd:desc | | --pretty | Human-readable JSON | | --table | Table format | | --stream | NDJSON output for large results | | --labels <label> | Smart Money label filter | | --smart-money | Filter for Smart Money addresses only |

Supported Chains

ethereum solana base bnb arbitrum polygon optimism avalanche linea scroll mantle ronin sei plasma sonic monad hyperevm iotaevm

Run nansen schema to get the current chain list (source of truth).

Agent Tips

Reduce token burn with --fields:

nansen research smart-money netflow --chain solana --fields token_symbol,net_flow_usd --limit 10

Use --stream for large results — outputs NDJSON instead of buffering a giant array.

ENS names work anywhere --address is accepted: --address vitalik.eth

Output Format

{ "success": true,  "data": <api_response> }
{ "success": false, "error": "message", "code": "ERROR_CODE", "status": 401 }

Critical error codes:

| Code | Action | |------|--------| | CREDITS_EXHAUSTED | Stop all API calls immediately. Check app.nansen.ai. | | UNAUTHORIZED | Wrong or missing key. Re-auth. | | RATE_LIMITED | Auto-retried by CLI. | | UNSUPPORTED_FILTER | Remove the filter and retry. |

Troubleshooting

| Symptom | Fix | |---------|-----| | command not found | npm install -g nansen-cli | | UNAUTHORIZED after login | cat ~/.nansen/config.json or set NANSEN_API_KEY | | Empty perp results | Use --symbol BTC, not --token. Perps are Hyperliquid-only. | | UNSUPPORTED_FILTER on token holders | Remove --smart-money — not all tokens have that data. | | Huge JSON response | Use --fields to select columns. |

Development

npm test              # mocked tests, no API key needed
npm run test:live     # live API (needs NANSEN_API_KEY)

See AGENTS.md for architecture and contributor guidance.

License

MIT © Nansen