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GET
/
v1
/
reactionById
By FID or cast
curl --request GET \
  --url https://snapchain-api.neynar.com/v1/reactionById \
  --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",
    "reactionBody": {
      "type": "Like",
      "targetCastId": {
        "fid": 2,
        "hash": "0x03aff391a6eb1772b20b4ead9a89f732be75fe27"
      },
      "targetUrl": "https://www.example.com/article"
    }
  }
}

Authorizations

ā€‹
x-api-key
string
header
default:NEYNAR_API_DOCS
required

API key to authorize requests

Query Parameters

ā€‹
fid
integer
required

The FID of the reaction's creator

ā€‹
target_fid
integer
required

The FID of the cast's creator

ā€‹
target_hash
string
required

The cast's hash

ā€‹
reaction_type
enum<string>
default:Like
required

Type of interaction a user can have with content on the Farcaster network.

  • Like: Express appreciation for the target content. Similar to "likes" or "favorites" on other platforms.
  • Recast: Share the target content with the user's followers, similar to a "retweet" or "reblog". Helps increase content visibility.
Available options:
Like,
Recast
Example:

"Like"

Response

The requested Reaction.

ā€‹
hash
string
required
Pattern: ^0x[0-9a-fA-F]{40}$
Example:

"0xd2b1ddc6c88e865a33cb1a565e0058d757042974"

ā€‹
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
ā€‹
signature
string<byte>
required
Pattern: ^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
ā€‹
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
ā€‹
signer
string
required
Pattern: ^0x[0-9a-fA-F]+$
ā€‹
data
object
required

Represents a user's reaction to content on the Farcaster network. Reactions can be likes or recasts of casts, allowing users to express appreciation or share content with their followers.