GET
/
v1
/
userDataByFid
Fetch UserData for a FID
curl --request GET \
  --url https://hub-api.neynar.com/v1/userDataByFid \
  --header 'x-api-key: <api-key>'
{
  "hash": "0xd2b1ddc6c88e865a33cb1a565e0058d757042974",
  "hashScheme": "HASH_SCHEME_BLAKE3",
  "signature": "aSDinaTvuI8gbWludGxpZnk=",
  "signatureScheme": "SIGNATURE_SCHEME_ED25519",
  "signer": "<string>",
  "data": {
    "type": "MESSAGE_TYPE_CAST_ADD",
    "fid": 2,
    "timestamp": 48994466,
    "network": "FARCASTER_NETWORK_MAINNET",
    "userDataBody": {
      "type": "USER_DATA_TYPE_PFP",
      "value": "https://i.imgur.com/123abc.jpg"
    }
  }
}

Authorizations

​
x-api-key
string
header
default:NEYNAR_API_DOCS
required

API key to authorize requests

Query Parameters

​
fid
integer
required

The FID that's being requested

​
user_data_type
enum<string>
default:USER_DATA_TYPE_PFP

The type of user data, either as a numerical value or type string. If this is omitted, all user data for the FID is returned

Available options:
USER_DATA_TYPE_PFP,
USER_DATA_TYPE_DISPLAY,
USER_DATA_TYPE_BIO,
USER_DATA_TYPE_URL,
USER_DATA_TYPE_USERNAME
​
pageSize
integer

Maximum number of messages to return in a single response

​
reverse
boolean

Reverse the sort order, returning latest messages first

​
pageToken
string

The page token returned by the previous query, to fetch the next page. If this parameter is empty, fetch the first page

Response

The requested UserData.

​
hash
string
required
Example:

"0xd2b1ddc6c88e865a33cb1a565e0058d757042974"

​
hashScheme
enum<string>
default:HASH_SCHEME_BLAKE3
required

Type of hashing scheme used to produce a digest of MessageData. - HASH_SCHEME_BLAKE3: Default scheme for hashing MessageData

Available options:
HASH_SCHEME_BLAKE3
​
signature
string<byte>
required
​
signatureScheme
enum<string>
default:SIGNATURE_SCHEME_ED25519
required

Type of signature scheme used to sign the Message hash

  • SIGNATURE_SCHEME_ED25519: Ed25519 signature (default)
  • SIGNATURE_SCHEME_EIP712: ECDSA signature using EIP-712 scheme
Available options:
SIGNATURE_SCHEME_ED25519,
SIGNATURE_SCHEME_EIP712
​
signer
string
required
​
data
object
required

Represents a message that updates a user's profile metadata. This can include changes to profile picture, display name, bio, URL, or preferred username. Each update modifies a single profile field. Common properties shared by all Farcaster message types. These properties provide essential metadata about the message's origin, timing, and network context.