Agentic Payments
Call the Nansen API without an account, subscription, or API key. Pay per request in USDC and get data back.
Agentic payments let machines: AI agents, scripts, bots access Nansen data on demand, settling each call on-chain. No provisioning, no key management, no long-lived credentials. Sign a payment, make the request, get the response.
Nansen supports two agentic payment rails on the same /api/v1/* endpoints:
x402: The open HTTP payment standard. USDC on Base or Solana. Broad client-side tooling and SDK support. Best for agents already operating on Base or Solana.
MPP on Tempo: Machine Payments Protocol settlement on Tempo mainnet. Sub-cent per-call pricing. Best for agents already settling on Tempo or optimising for per-call cost.
Both rails hit the same endpoints and return identical response bodies. An agent can mix and match x402 for some calls, MPP for others.
Supported endpoints
All Pro-tier endpoints accept agentic payments, except:
/api/v1/labels/*— Pro subscription only (proprietary entity data).
Pricing is tiered by endpoint:
Basic
$0.01/call
Token Screener, Wallet Balances, Transactions, PnL, DEX Trades, Flows
Premium
$0.05/call
Counterparties, Holders, PnL Leaderboard, Perp Leaderboard
Smart Money
$0.05/call
SM Net Flow, SM Inflows, SM Holdings, SM DEX Trades
The full endpoint list and tier breakdown is on the x402 page. MPP uses the same tiers and prices.
Discovery
Fetch /.well-known/x402 to see every priced endpoint, its cost, and which payment protocols it supports:
The paymentProtocols field lists the rails available for each endpoint (x402, mpp, or both).
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