Nansen
Onchain wallet-label analytics and trading platform built around Smart Money tracking.
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Nansen key facts
| Category | Analytics tool |
|---|---|
| Chains | 20+ chains |
| Platforms | Web, Mobile app, API |
| Free plan | API: 100 trial credits, then 10-credit daily top-up; 15 requests/sec, 300/min |
| Pricing | API Pro $49/mo billed annually or $69/mo monthly |
| Launched | 2020 |
| Chains | 20+ chains |
| US availability | Partly: perpetuals and Outcomes features closed to US users |
What is Nansen?
Nansen is an onchain analytics platform that started in 2020 with wallet labels and Smart Money tracking and now adds in-app trading. It cites 500M+ labeled addresses; its API has a free plan with 100 trial credits and a Pro plan at $49 a month billed annually or $69 monthly.
How Nansen works
Nansen attaches human-readable labels to hundreds of millions of addresses, marking exchanges, funds, market makers and notable investors, and builds its Smart Money cohort from them.
Current Smart Money labels are Smart Trader, 30D, 90D and 180D Smart Trader, and Smart HL Perps Trader for profitable Hyperliquid traders. The Fund label was dropped from the current cohort on September 9, 2026. Smart Money holdings cover chains including Ethereum, Solana, Base, Arbitrum, BNB Chain, Polygon, Optimism, Avalanche, Sonic, Monad and Robinhood.
Trading runs on the same data. The spot API compares quotes across several aggregators, prepares an unsigned transaction and broadcasts it after you sign locally, so Nansen never receives your private key. Spot swaps work on Solana and Base, including routes between the two, and one side of each swap must be USDC or the native token. Perpetuals run on Hyperliquid. Cross-chain routes need a trade of roughly $5 or more.
How to start with Nansen
- Sign up at nansen.ai.
- The web app, mobile app, API, a CLI installed with npm install -g nansen-cli, and an MCP server for Claude or Cursor are all offered.
- In the app's API tab you create a key with a guided first call.
- The Free API plan gives 100 one-time credits, then tops up to 10 credits a day, at 15 requests per second and 300 per minute.
- You can also skip keys and pay per call from $0.01 in USDC on Base or Solana through x402.
Nansen fees and limits
- API Pro costs $49 a month on annual billing or $69 month to month.
It grants 2,000 credits when you subscribe, and on the 1st of each month tops the included balance back up to 2,000 only if it has fallen below that, so unused credits do not stack. Extra credits can be bought at bulk discounts and expire one year after purchase. Pro rate limits are 75 requests per second and 1,500 per minute, and you can pay by card or crypto.
Risks to know before using Nansen
- Labels are Nansen's own attributions, and the cohort changes over time: after the Fund label was removed, Smart Money holdings before and after September 9, 2026 are not like for like.
- When you trade through Nansen, your own wallet signs every transaction, so custody stays with you, but the docs warn that liquidity for a pair and direction is not guaranteed.
- Nansen now calls itself an onchain trading company and runs referral and affiliate programs.
Nansen alternatives
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Where Nansen ranks on DappAtlas
Listed next to Nansen
Nansen pros and cons
- 500M+ labeled addresses
- Free API plan with a daily 10-credit refill
- Pay-per-call API access with USDC from $0.01 per query
- Free API plan has only 100 trial credits
- Now positions itself as a trading platform, not a pure analytics tool
- Perpetuals and Outcomes trading closed to US users
Nansen FAQ
What is Nansen?
Nansen is an onchain analytics platform that started in 2020 with wallet labels and Smart Money tracking and now adds in-app trading. It cites 500M+ labeled addresses; its API has a free plan with 100 trial credits and a Pro plan at $49 a month billed annually or $69 monthly.
Which chains does Nansen support?
20+ chains.
How much does Nansen cost?
API Pro $49/mo billed annually or $69/mo monthly, according to Nansen’s own page (checked Sep 26, 2026). Free plan: API: 100 trial credits, then 10-credit daily top-up; 15 requests/sec, 300/min.
Is Nansen available in the US?
Partly: perpetuals and Outcomes features closed to US users, according to Nansen’s own page (checked Sep 26, 2026).
Sources
How this page works
Sources: Nansen: official site, Nansen: API, Nansen: API docs, Credits and Pricing Guide. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.