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GET
By FID and Hash

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.

Pattern: ^0x[0-9a-fA-F]{40}$
Example:

"0x03aff391a6eb1772b20b4ead9a89f732be75fe27"

Response

The requested Cast.

hash
string
required
Pattern: ^0x[0-9a-fA-F]{40}$
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
Pattern: ^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
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
Pattern: ^0x[0-9a-fA-F]+$
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.