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POST
/
v2
/
farcaster
/
reaction
/
Post a reaction
curl --request POST \
  --url https://api.neynar.com/v2/farcaster/reaction/ \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "signer_uuid": "19d0c5fd-9b33-4a48-a0e2-bc7b0555baec",
  "target": "0x3702ec1b298bb7ac6f00346432d959ad7b05b9a8 -OR- http://neynar.com/",
  "idem": "<string>",
  "target_author_fid": 3
}
'
import requests

url = "https://api.neynar.com/v2/farcaster/reaction/"

payload = {
"signer_uuid": "19d0c5fd-9b33-4a48-a0e2-bc7b0555baec",
"target": "0x3702ec1b298bb7ac6f00346432d959ad7b05b9a8 -OR- http://neynar.com/",
"idem": "<string>",
"target_author_fid": 3
}
headers = {
"x-api-key": "<api-key>",
"Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)
const options = {
method: 'POST',
headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
signer_uuid: '19d0c5fd-9b33-4a48-a0e2-bc7b0555baec',
target: '0x3702ec1b298bb7ac6f00346432d959ad7b05b9a8 -OR- http://neynar.com/',
idem: '<string>',
target_author_fid: 3
})
};

fetch('https://api.neynar.com/v2/farcaster/reaction/', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));
<?php

$curl = curl_init();

curl_setopt_array($curl, [
CURLOPT_URL => "https://api.neynar.com/v2/farcaster/reaction/",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'signer_uuid' => '19d0c5fd-9b33-4a48-a0e2-bc7b0555baec',
'target' => '0x3702ec1b298bb7ac6f00346432d959ad7b05b9a8 -OR- http://neynar.com/',
'idem' => '<string>',
'target_author_fid' => 3
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"x-api-key: <api-key>"
],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}
package main

import (
"fmt"
"strings"
"net/http"
"io"
)

func main() {

url := "https://api.neynar.com/v2/farcaster/reaction/"

payload := strings.NewReader("{\n \"signer_uuid\": \"19d0c5fd-9b33-4a48-a0e2-bc7b0555baec\",\n \"target\": \"0x3702ec1b298bb7ac6f00346432d959ad7b05b9a8 -OR- http://neynar.com/\",\n \"idem\": \"<string>\",\n \"target_author_fid\": 3\n}")

req, _ := http.NewRequest("POST", url, payload)

req.Header.Add("x-api-key", "<api-key>")
req.Header.Add("Content-Type", "application/json")

res, _ := http.DefaultClient.Do(req)

defer res.Body.Close()
body, _ := io.ReadAll(res.Body)

fmt.Println(string(body))

}
HttpResponse<String> response = Unirest.post("https://api.neynar.com/v2/farcaster/reaction/")
.header("x-api-key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"signer_uuid\": \"19d0c5fd-9b33-4a48-a0e2-bc7b0555baec\",\n \"target\": \"0x3702ec1b298bb7ac6f00346432d959ad7b05b9a8 -OR- http://neynar.com/\",\n \"idem\": \"<string>\",\n \"target_author_fid\": 3\n}")
.asString();
require 'uri'
require 'net/http'

url = URI("https://api.neynar.com/v2/farcaster/reaction/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"signer_uuid\": \"19d0c5fd-9b33-4a48-a0e2-bc7b0555baec\",\n \"target\": \"0x3702ec1b298bb7ac6f00346432d959ad7b05b9a8 -OR- http://neynar.com/\",\n \"idem\": \"<string>\",\n \"target_author_fid\": 3\n}"

response = http.request(request)
puts response.read_body
{
  "message": "<string>",
  "success": true
}
{
"message": "<string>",
"code": "<string>",
"property": "<string>",
"status": 123
}
{
"message": "<string>",
"code": "<string>",
"property": "<string>",
"status": 123
}
{
"message": "<string>",
"code": "<string>",
"property": "<string>",
"status": 123
}
{
"message": "<string>",
"code": "<string>",
"property": "<string>",
"status": 123
}

Node.js SDK

๐Ÿ”— SDK Method: publishReaction Use this API endpoint with the Neynar Node.js SDK for typed responses and better developer experience.

Authorizations

x-api-key
string
header
default:NEYNAR_API_DOCS
required

API key to authorize requests

Body

application/json
reaction_type
enum<string>
required
Available options:
like,
recast
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.

Example:

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

target
string
required

Target cast hash (hex string starting with 0x) OR a valid URL.

Example:

"0x3702ec1b298bb7ac6f00346432d959ad7b05b9a8 -OR- http://neynar.com/"

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.
target_author_fid
integer<int32>

The unique identifier of a farcaster user or app (unsigned integer)

Required range: x >= 0
Example:

3

Response

Success

message
string
success
boolean