GET
/
v1
/
castsByParent
curl --request GET \
  --url https://hub-api.neynar.com/v1/castsByParent \
  --header 'x-api-key: <api-key>'
{
  "messages": [
    {
      "hash": "0xd2b1ddc6c88e865a33cb1a565e0058d757042974",
      "hashScheme": "HASH_SCHEME_BLAKE3",
      "signature": "aSDinaTvuI8gbWludGxpZnk=",
      "signatureScheme": "SIGNATURE_SCHEME_ED25519",
      "signer": "<string>",
      "data": {
        "fid": 2,
        "timestamp": 48994466,
        "network": "FARCASTER_NETWORK_MAINNET",
        "castAddBody": {
          "embedsDeprecated": [
            "<string>"
          ],
          "mentions": [
            2
          ],
          "parentCastId": {
            "fid": 2,
            "hash": "0x03aff391a6eb1772b20b4ead9a89f732be75fe27"
          },
          "parentUrl": "chain://eip155:1/erc721:0x39d89b649ffa044383333d297e325d42d31329b2",
          "text": "<string>",
          "mentionsPositions": [
            123
          ],
          "embeds": [
            {
              "castId": {
                "fid": 2,
                "hash": "0x03aff391a6eb1772b20b4ead9a89f732be75fe27"
              }
            }
          ]
        },
        "type": "MESSAGE_TYPE_CAST_ADD"
      }
    }
  ],
  "nextPageToken": "AuzO1V0DtaItCwwa10X6YsfStlynsGWT"
}

Authorizations

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

API key to authorize requests

Query Parameters

​
fid
integer

The Farcaster ID (FID) of the parent cast's creator. This parameter must be used together with the 'hash' parameter to uniquely identify a parent cast. Required only when using hash-based lookup instead of URL-based lookup. The FID is a unique identifier assigned to each Farcaster user.

Required range: x >= 1
Example:

194

​
hash
string

The unique hash identifier of the parent cast. Must be used together with the 'fid' parameter when doing hash-based lookup. This is a 40-character hexadecimal string prefixed with '0x' that uniquely identifies the cast within the creator's posts. Not required if using URL-based lookup.

Example:

"0x776593353e47dc4e7f4df3199a9b04cc8efa30d9"

​
url
string

Cast URL starting with 'chain://'

Example:

"chain://eip155:1/erc721:0x39d89b649ffa044383333d297e325d42d31329b2"

​
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

200
application/json
A successful response containing all reply casts to the specified parent cast, along with pagination information for traversing large result sets.
​
messages
object[]
required

An array of reply casts to the specified parent cast, ordered by oldest first. Each cast includes its content, timestamp, and other metadata.

​
nextPageToken
string
required

Base64-encoded pagination token for fetching the next page of results. An empty value indicates there are no more pages to return. Used in conjunction with the pageSize parameter to implement pagination across large result sets.

Example:

"AuzO1V0DtaItCwwa10X6YsfStlynsGWT"

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