🙋Frequently Asked Questions

Authentication

How can developers obtain API keys and access Nansen’s API endpoints?

You can request an API key by signing up on Nansen and purchasing the Professional Plan. Once approved, keys are issued with authentication instructions. You can find the detailed steps here.

Available Endpoints

What types of data are available through Nansen’s API (e.g., wallet balances, token prices, labeled transactions)?

The API provides access to wallet balances, transaction data, exchange flows, smart money tracking and other on-chain analytics across multiple chains. You can find the full list of endpoints here.

API Rate Limits & Quotas

What are the usage limits for Nansen’s API, including monthly quotas and per-second rate restrictions?

..... You can read more about it here.

Data Coverage

Can I access labeled transaction data across multiple chains via the API?

Yes, you can use /transactions to access transaction data and /labels endpoint to fetch labels across multiple chains.

What on-chain metrics are available via Nansen’s API?

Metrics include wallet balances, token flows, smart money movements, portfolio distributions, and other derived analytics from raw blockchain data. You can find the full list of endpoints here.

Does the API provide access to smart money wallet activities and behaviors?

Yes, API allows users to monitor smart money inflows, portfolio holdings and DEX Trades. You can find the full list of Smart Money endpoints here.

How does Nansen handle and provide data for non-EVM chains such as Solana or Sui?

Nansen processes data from non-EVM chains by building native integrations that extract and structure on-chain information similar to EVM-based chains, while adjusting for each chain’s unique architecture. You can find the full list of supported chains here.

Data Freshness and Performance

How frequently is the data updated in the API?

Data is refreshed at varying intervals, with many endpoints updating in real-time depending on the data type.

What is the typical latency for data delivery through Nansen’s API?

Typical data latency is low, often within seconds, depending on the chain being queried

Developer Tools and Integration

Does Nansen offer SDKs, libraries, or tools for integrating analytics into third-party applications like DEXs or wallets?

In what formats (e.g., CSV, JSON) can data be exported from Nansen’s API or dashboards?

API responses are provided in JSON format, and dashboard data can typically be exported as CSV files for further analysis.

Can I programmatically perform bulk analysis on wallet data using Nansen’s tools?

Yes, Nansen’s API endpoints are designed for scalable, programmatic analysis across large datasets of wallets and transactions.