Authentication

Browser login requests nansen:api for API-key-equivalent account API permissions; existing OAuth/MCP nansen:read semantics and separate wallet authorization are unchanged.

Before any research command or loop, require an explicitly selected API key or saved browser session. Run nansen auth status first. Its cached/unverified metadata does not prove credential validity or unlocked storage. Cached access-token expiry alone does not mean the session is unusable: the CLI normally renews a selected session automatically during an already-authorized research task, without another consent request or a separate account check. Stop on anonymous selection, invalid authentication state, blocked or uncertain renewal/cleanup, or an actual authentication failure, including rejected or expired refresh authority. Follow the CLI error guidance; use the free nansen account check when troubleshooting calls for it. Do not unset a failed key, erase a session or switch to anonymous access to retry.

Use nansen login for fresh browser approval within the documented platform scope, or configure a conventional API key. NANSEN_API_KEY overrides the saved session. OpenClaw's optional primaryEnv mapping preserves configured API-key injection; it is not a required-key gate or proof of authentication. Normal credits and entitlements apply. Login does not purchase credits. Browser login is available in CLI 2.0.0 within the macOS arm64 preview scope.

API keys and browser sessions use the same automatic x402 payment behavior: a supported HTTP 402 challenge can spend funds from the configured wallet under existing wallet authorization, payment policy and spending limits. Each call, including calls in loops, can incur a payment. Authentication, authorization and session-renewal failures never trigger payment; login verification and nansen account never pay automatically. Anonymous x402 remains available as a separate paid workflow requiring explicit user intent and payment setup. Do not run this research workflow anonymously or switch to anonymous access after authentication fails.

Perp Market Scan

Answers: "What's the state of the Hyperliquid perp market right now?"

nansen research perp screener --sort volume:desc --limit 20
# → token_symbol, volume, buy/sell_volume, buy_sell_pressure, open_interest, funding, mark_price

nansen research perp leaderboard --days 7 --limit 20
# → trader_address, trader_address_label, total_pnl, roi, account_value

nansen research smart-money perp-trades --limit 20
# → token_symbol, side, action (Open/Close), value_usd, price_usd, trader_address_label

New Filters (ECINT-6680)

--trader-type

Filter by trader type. Accepted values: all (default), sm, whale, public_figure, high_winrate_hl_perps_trader.

# Show only whale traders
nansen research perp screener --trader-type whale --limit 10

# Show only smart money traders
nansen research perp screener --trader-type sm --limit 20

# Show high win-rate HL perps traders
nansen research perp screener --trader-type high_winrate_hl_perps_trader --limit 20

--sm-label-filter

Comma-separated Nansen SM labels to filter by. Only applies when --trader-type is all or sm.

# Filter to a specific SM label
nansen research perp screener --trader-type sm --sm-label-filter "30D Smart Trader"

# Multiple labels
nansen research perp screener --sm-label-filter "30D Smart Trader,Smart LP"

--trader-label-filter

Comma-separated HL perps trader labels to filter by. Only applies when --trader-type is all or sm.

# Filter to HL Perps Whale label
nansen research perp screener --trader-label-filter "HL Perps Whale"

--sectors-filter

Comma-separated category:subcategory pairs to filter coins by sector.

# Filter to AI and DeFi crypto sectors
nansen research perp screener --sectors-filter "Crypto:AI,Crypto:DeFi" --trader-type whale

# Combine with trader type and limit
nansen research perp screener --sectors-filter "Crypto:AI,Crypto:DeFi" --trader-type whale --limit 10 --sort volume:desc

Combined Examples

# Whale traders in AI crypto, sorted by volume
nansen research perp screener --trader-type whale --sectors-filter "Crypto:AI" --sort volume:desc --limit 10

# Smart money with specific label, last 7 days
nansen research perp screener --trader-type sm --sm-label-filter "30D Smart Trader" --days 7 --limit 20

# All traders in TradFi stocks sector
nansen research perp screener --sectors-filter "TradFi:Stocks" --sort open_interest:desc --limit 20