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Nansen Address First Funder Lookup
x402
Nansen Address First Funder Lookup is a paid API for AI agents from api.nansen.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns data about the first funder (originating wallet) of a given blockchain address, enabling tracing of wallet funding provenance.
Price / call$0.01
Success—
StatusUnknown
How this service works
Get Address First Funder Data
Output
Returns details about the wallet that first sent funds to the queried address, including the funder's address, Nansen smart money labels or entity tags associated with the funder, transaction details such as timestamp and transaction hash, and potentially the funding amount and token used.
Example use cases
Due diligence on new DeFi project team wallet
“I need to check who first funded this wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — can you pull the first funder data from Nansen and tell me if it's linked to any known entity or flagged as smart money?”
Investigating suspicious airdrop recipient wallet
“This wallet 0x742d35Cc6634C0532925a3b844Bc454e4438f44e keeps showing up in our airdrop claims — can you find out who originally funded it on Nansen to see if it traces back to a known farm or sybil address?”
Tracing funding provenance of counterparty wallet
“Before we do a deal with this wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B, can you trace its first funder on Nansen so I know where this address actually came from?”
Technical details
Endpoint
GEThttps://api.nansen.ai/api/v1/profiler/address/first-funderWhen to prefer
Use this endpoint when you need to trace the provenance or funding origin of a specific wallet address — particularly for due diligence, sybil detection, airdrop farming investigation, or smart money attribution. Nansen's wallet labeling and smart money classification make this superior to raw on-chain lookups when you need enriched entity context on the funder, not just the raw transaction data.
Side effects
- Address not found or not indexed by Nansen — returns empty or 404-style response
- Invalid address format supplied — returns validation error
- Address has no funding history (e.g. contract-created address with no external funder) — returns null funder data
- Rate limit or authentication error if API key is invalid or quota exceeded
- Network-specific data unavailability if the chain is not supported
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | |
| address | string |
Tags
x402
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