POST
/
casts
curl --request POST \
  --url https://api.pinata.cloud/v3/farcaster/casts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "castAddBody": {
    "text": "<string>",
    "parentUrl": "<string>",
    "embeds": [
      {
        "url": "<string>",
        "castId": {
          "fid": 123,
          "hash": "<string>"
        }
      }
    ],
    "mentions": [
      123
    ],
    "mentionsPositions": [
      123
    ],
    "parentCastId": {
      "fid": 123,
      "hash": "<string>"
    }
  },
  "signerId": "<string>"
}'
{
  "data": {
    "data": {
      "type": "MESSAGE_TYPE_CAST_ADD",
      "fid": 401191,
      "timestamp": 102505958,
      "network": "FARCASTER_NETWORK_MAINNET",
      "castAddBody": {
        "embedsDeprecated": [],
        "mentions": [],
        "text": "Hello World!",
        "mentionsPositions": [],
        "embeds": []
      }
    },
    "hash": "0xb3668292af912397fad6b8457223e75c04221992",
    "hashScheme": "HASH_SCHEME_BLAKE3",
    "signature": "U40EB6YqZNI/AdNrXLyk7jjh+U/XdHe6fWTX28IDX6PJQTfG+7cJX/dUtrOzNfvCojEUqaaks3a+oPBPU7jVAw==",
    "signatureScheme": "SIGNATURE_SCHEME_ED25519",
    "signer": "0x86367a36c3c181c46acdc6027109dbaa75c5fbc97c500af23f1ea8c987f12375",
    "dataBytes": "CAEQp74YGOa78DAgASoOIgxIZWxsbyBXb3JsZCE="
  }
}

The body of sending a cast is made up of primarily two pieces. One is the signerId provided by using Farcaster Auth. The other is the castAddBody object which follows the same pattern of Farcaster Hubs when submitting a cast.

body = JSON.stringify({
  castAddBody: {
    text: "Hello World!", // Just a plain text cast
    parent_url: "https://warpcast.com/~/channel/pinata", // What channel you want to cast in
    embeds: [ // An array of embeds, including links or quote casting
        { // URLs or links are just an object with the url
            url: "https://dweb.mypinata.cloud/ipfs/QmYSzs7WczucVrPN2CZcZeEzyGRDrxrFEWGtYA32jz2L3U?filename=sendit.gif"
        },
        {// Quote casting includes a castId object with the hash of the cast and the FID of the user who sent it
            castId: {
                fid: 6023,
                hash: "0xb3668292af912397fad6b8457223e75c04221992"
            }
        }
    ],
    mentions: [6023], // An array of FIDs to mention someone in a post 
    mention_positions: [2], // An array of positions where the mentions should be placed in order of appearance
    parent_cast_id: { // Used when replying to a cast, same casdId struct used in embeds
        fid: 6023,
        hash: "0xb3668292af912397fad6b8457223e75c04221992"
    }
  },
  signerId: "e5cf5d84-7671-4402-8df0-84b0efdc24cd" // The signerId of the user sending a cast, already approved via Farcaster Auth
})

Authorizations

​
Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json
​
castAddBody
object
​
signerId
string

Response

200 - application/json
OK

The response is of type object.

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