Nansen API adds backtesting data and faster top-ups for strategy replay

Backtesting and historical data access

Nansen expanded historical backtesting endpoints for its API, letting traders validate algorithmic strategies against onchain signals. Traders can now replay strategies against Nansen's historical onchain data, including Token God Mode metrics, without look-ahead bias—a critical requirement for accurate strategy validation.

The new historical endpoints include top holders and DEX trades data, each costing 5 credits per call. At that rate, a Pro plan user gets roughly 400 historical queries per month before needing to top up. Nansen's Pro API plan comes with 2,000 starter credits per month, priced between $49 and $69.

Credit system overhaul

The previous system created friction. Running out of credits meant manual recharges that could take 1-2 days to process. For active researchers and traders running automated pipelines, that delay disrupted work.

Nansen introduced an auto top-up feature that automatically replenishes credits when balance drops below a user-set threshold. Nansen also added instant crypto purchases for credits, supporting stablecoins and selected native tokens across Solana, Ethereum, Base, and Polygon. Users can now refill without waiting.

Onchain intelligence as a foundation

Nansen's Smart Money labels track wallets that have historically demonstrated profitable trading behavior. The backtesting endpoints let builders validate whether signals derived from these wallets hold up under historical scrutiny. For algorithmic traders, that's the core value proposition—reliable data, fast iteration, no artificial delays.