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v1

latestOpenAPI 3.0.42026-07-26159287356.1 KB
Reactions

On cast

Retrieve all reactions (likes or recasts) on a specific cast in the Farcaster network. The cast is identified by its creator's FID and unique hash. This endpoint helps track engagement metrics and user interactions with specific content.

get/v1/reactionsByCast

Query parameters

target_fidinteger required

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.

Example:1

The FID of the cast's creator. Required to uniquely identify the cast that received the reactions. Must be used in conjunction with target_hash.

target_hashstring required
Example:0xfec8fd3546e1f46cf5ad10a4ff9f5d53a3bbe9be

The unique hash identifier of the cast that received the reactions. This is a 40-character hexadecimal string prefixed with '0x' that uniquely identifies the cast within the creator's posts. Must be used with target_fid.

reaction_type'Like' | 'Recast' 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.
Example:Like
pageSizeinteger

Maximum number of messages to return in a single response

reverseboolean

Reverse the sort order, returning latest messages first

pageTokenstring

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 Reactions.

nextPageTokenstring byte 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 response

{
  "messages": [
    {
      "hash": "0xd2b1ddc6c88e865a33cb1a565e0058d757042974",
      "data": {
        "fid": 2,
        "timestamp": 48994466,
        "reactionBody": {
          "type": "Like",
          "targetCastId": {
            "fid": 2,
            "hash": "0x03aff391a6eb1772b20b4ead9a89f732be75fe27"
          },
          "targetUrl": "https://www.example.com/article"
        }
      }
    }
  ],
  "nextPageToken": "AuzO1V0DtaItCwwa10X6YsfStlynsGWT"
}