Address First Funder

Returns the first funder of a wallet: the earliest address to send native gas to the input EVM address.

First funder = the first address to send native gas to this wallet, on whichever supported chain the earliest funding happened. This is the gas-funder / funding source, not the USDC (or any stablecoin) source. Usually the same entity (a CEX withdrawal drops both), but not guaranteed.

Notes

• Input is any EVM address; non-EVM addresses are rejected.

• chain is fixed to all — the first funder is resolved across chains and the returned chain reflects where the first funding occurred.

• Returns a current, point-in-time view: there is no date-range parameter or historical look-back. See Data Coverage by Chain.

• An empty result (data: []) is returned when the wallet has no first-funder attribution — e.g. a wallet that was only ever credited by an exchange or bridge withdrawal that paid the gas on its behalf, so the wallet itself never received native gas. This is a normal 200 response, not an error.

Get Address First Funder Data

post

Get the first wallet that funded the input EVM address. The first funder is the earliest address to send native gas to the wallet, returned with the Nansen label of that funder and the funding transaction details.

Authorizations

apikeystringRequired

API key for authentication

Body

addressstringRequired

EVM address to look up the first funder for

Example: 0x28c6c06298d514db089934071355e5743bf21d60

chainstring · enumOptional

Fixed to 'all'; the first funder is resolved across chains

Default: allExample: allPossible values:

Responses

200

Address first funder data

application/json

400

Bad Request

application/json

401

Unauthorized

application/json

402

Payment Required

application/json

403

Forbidden

application/json

404

Not Found

application/json

422

Unprocessable Content

application/json

429

Too Many Requests

application/json

500

Internal Server Error

application/json

502

Bad Gateway

application/json

503

Service Unavailable

application/json

504

Gateway Timeout

application/json

post/api/v1/profiler/address/first-funder

POST /api/v1/profiler/address/first-funder HTTP/1.1
Host: api.nansen.ai
apikey: YOUR_API_KEY
Content-Type: application/json
Accept: */*
Content-Length: 70

{
  "address": "0x28c6c06298d514db089934071355e5743bf21d60",
  "chain": "all"
}

{
  "pagination": {
    "page": 1,
    "per_page": 10,
    "is_last_page": true
  },
  "data": [
    {
      "wallet_address": "text",
      "first_funder_address": "text",
      "first_funder_name": "text",
      "transaction_hash": "text",
      "block_timestamp": "text",
      "chain": "text"
    }
  ]
}