POST
/
farcaster
/
cast
curl --request POST \
  --url https://api.neynar.com/v2/farcaster/cast \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "signer_uuid": "19d0c5fd-9b33-4a48-a0e2-bc7b0555baec",
  "text": "Writing to @farcaster via the @neynar APIs 🪐"
}'
{
  "success": true,
  "cast": {
    "hash": "0xfe90f9de682273e05b201629ad2338bdcd89b6be",
    "author": {
      "fid": 3
    },
    "text": "<string>"
  }
}

Easiest way to start is to clone our repo that has sign in w/ Farcaster and writes. Ensure you’re using a signer_uuid that was made with the same API key.

Authorizations

x-api-key
string
header
default:NEYNAR_API_DOCS
required

API key to authorize requests

Body

application/json
signer_uuid
string
required

UUID of the signer. signer_uuid is paired with API key, can't use a uuid made with a different API key.

Examples:

"19d0c5fd-9b33-4a48-a0e2-bc7b0555baec"

text
string
embeds
object[]
parent
string

parent_url of the channel the cast is in, or hash of the cast

channel_id
string

Channel ID of the channel where the cast is to be posted. e.g. neynar, farcaster, warpcast

Examples:

"neynar"

idem
string

An Idempotency key is a unique identifier for the request. Note:

  1. This is used to prevent duplicate requests. Use the same idem key on retry attempts.
  2. This should be a unique identifier for each request.
  3. Recommended format is a 16-character string generated by the developer at the time of making this request.
parent_author_fid
integer

The unique identifier of a farcaster user (unsigned integer)

Examples:

3

191

2

194

19960

Response

200
application/json
Successful operation.
success
boolean
required
cast
object
required