Data & indexing · last verified 2026-09-17

Nansen API

nansen.ai/api ↗ JSON record

Data & indexing free · key SVM / Solana EVM Other promo verified

Access model (raw)

free-with-key | x402 pay-per-call (no key)

Free tier

Free: 100 trial credits + 10 credits/day refill; all Pro endpoints accessible; 15 req/s, 300 req/min.

Rate limit

Free 15 rps / 300 rpm; Pro 75 rps / 1,500 rpm

Paid from

Pro $49/mo annual or $69/mo monthly (one-time 2,000 credits, monthly top-up back to 2,000); x402 pay-per-call $0.01/call basic, $0.05/call premium and Smart Money endpoints (USDC on Base/Solana, no API key required)

Pricing unit

credits

Chains

38 chains per docs llms-full.txt (site says 25+). Avalanche and Solana listed; Robinhood, Base, Hyperliquid highlighted on site.

Promos

Meridian Buildathon (Sep 14-27, 2026): 'API credit purchases get 2x credits' during the competition period; prizes 1st $10,000 USDC, honorable mentions 100,000 Nansen API credits each; no application required (create API key, make 1,000 API calls, post demo on X tagging @nansen_ai, submit form with GitHub repo). Pro also lists 'Bulk credit discounts'.

Evidence freshness

fresh · last checked 2026-09-17

Chain families

svm evm other

Capabilities

labels/smart-money analytics
token/portfolio APIs (balances, PnL, holders)
price/market screener
MCP + CLI
x402 pay-per-call

Pricing page

nansen.ai/api

Sourcesnansen.ai/api docs.nansen.ai/llms-full.txt nansen.ai/campaigns/meridian-buildathon

Change history1 entries · newest first

2026-09-17
credits program
Nansen Meridian Buildathon: 2x credits on every API credit purchase through Sept 27, plus 100,000-credit honorable mentions and $10K USDC first prize (no application)verified
nansen.ai/campaigns/meridian-buildathon (linked from the API page hero): during Sept 14-27, 2026 every API credit purchase gets 2x credits. Prizes: 1st $10,000 USDC, 2nd AirPods Max + Ledger + Keychron, 3rd Sony WH-1000XM5 + Ledger, honorable mentions 100,000 Nansen API credits each. Entry: create an API key at app.nansen.ai/api, make 1,000 API calls on any endpoint, post a demo recording on X tagging @nansen_ai, submit email + X link + GitHub repo at nsn.ai/meridian-submit ('if it breaks in the recording, it doesn't qualify'). Docs now list 38 chains (Avalanche, Solana, Robinhood highlighted); Pro is $49/mo annual or $69/mo monthly; x402 pay-per-call $0.01 basic / $0.05 premium.
nansen.ai/campaigns/meridian-buildathon nansen.ai/api docs.nansen.ai/llms-full.txt

Change history1 entries · newest first

Nansen Meridian Buildathon: 2x credits on every API credit purchase through Sept 27, plus 100,000-credit honorable mentions and $10K USDC first prize (no application)verified