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GET
/
v1
/
castById
By FID and Hash
curl --request GET \
  --url https://snapchain-api.neynar.com/v1/castById \
  --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",
    "castAddBody": {
      "embedsDeprecated": [
        "<string>"
      ],
      "mentions": [
        2
      ],
      "text": "<string>",
      "mentionsPositions": [
        123
      ],
      "embeds": [
        {
          "castId": {
            "fid": 2,
            "hash": "0x03aff391a6eb1772b20b4ead9a89f732be75fe27"
          }
        }
      ],
      "parentCastId": {
        "fid": 2,
        "hash": "0x03aff391a6eb1772b20b4ead9a89f732be75fe27"
      },
      "parentUrl": "chain://eip155:1/erc721:0x39d89b649ffa044383333d297e325d42d31329b2"
    }
  }
}

Authorizations

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

API key to authorize requests

Query Parameters

​
fid
integer<uint64>
required

The FID of the cast's creator Farcaster ID (FID). A unique identifier assigned to each user in the Farcaster network. This number is permanent and cannot be changed. FIDs are assigned sequentially when users register on the network.

Required range: x >= 1
Example:

1

​
hash
string
required

The unique hash identifier of the cast. This is a 40-character hexadecimal string prefixed with '0x' that uniquely identifies a specific cast in the Farcaster network.

Example:

"0x03aff391a6eb1772b20b4ead9a89f732be75fe27"

Response

The requested Cast.

​
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 new cast (post) being created in the Farcaster network. A cast can include text content, mentions of other users, embedded URLs, and references to parent posts for replies.