Post a 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",
"channel_id": "neynar",
"embeds": [
{
"cast_id": {
"fid": 3,
"hash": "<string>"
}
}
],
"idem": "<string>",
"parent": "<string>",
"parent_author_fid": 3,
"text": "<string>"
}
'import requests
url = "https://api.neynar.com/v2/farcaster/cast/"
payload = {
"signer_uuid": "19d0c5fd-9b33-4a48-a0e2-bc7b0555baec",
"channel_id": "neynar",
"embeds": [{ "cast_id": {
"fid": 3,
"hash": "<string>"
} }],
"idem": "<string>",
"parent": "<string>",
"parent_author_fid": 3,
"text": "<string>"
}
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',
channel_id: 'neynar',
embeds: [{cast_id: {fid: 3, hash: '<string>'}}],
idem: '<string>',
parent: '<string>',
parent_author_fid: 3,
text: '<string>'
})
};
fetch('https://api.neynar.com/v2/farcaster/cast/', 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/cast/",
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',
'channel_id' => 'neynar',
'embeds' => [
[
'cast_id' => [
'fid' => 3,
'hash' => '<string>'
]
]
],
'idem' => '<string>',
'parent' => '<string>',
'parent_author_fid' => 3,
'text' => '<string>'
]),
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/cast/"
payload := strings.NewReader("{\n \"signer_uuid\": \"19d0c5fd-9b33-4a48-a0e2-bc7b0555baec\",\n \"channel_id\": \"neynar\",\n \"embeds\": [\n {\n \"cast_id\": {\n \"fid\": 3,\n \"hash\": \"<string>\"\n }\n }\n ],\n \"idem\": \"<string>\",\n \"parent\": \"<string>\",\n \"parent_author_fid\": 3,\n \"text\": \"<string>\"\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/cast/")
.header("x-api-key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"signer_uuid\": \"19d0c5fd-9b33-4a48-a0e2-bc7b0555baec\",\n \"channel_id\": \"neynar\",\n \"embeds\": [\n {\n \"cast_id\": {\n \"fid\": 3,\n \"hash\": \"<string>\"\n }\n }\n ],\n \"idem\": \"<string>\",\n \"parent\": \"<string>\",\n \"parent_author_fid\": 3,\n \"text\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.neynar.com/v2/farcaster/cast/")
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 \"channel_id\": \"neynar\",\n \"embeds\": [\n {\n \"cast_id\": {\n \"fid\": 3,\n \"hash\": \"<string>\"\n }\n }\n ],\n \"idem\": \"<string>\",\n \"parent\": \"<string>\",\n \"parent_author_fid\": 3,\n \"text\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"cast": {
"author": {
"fid": 3
},
"hash": "0x71d5225f77e0164388b1d4c120825f3a2c1f131c",
"text": "<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
}Cast
Post a cast
Posts a cast or cast reply. Works with mentions and embeds.
(In order to post a cast signer_uuid must be approved)
POST
/
v2
/
farcaster
/
cast
/
Post a 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",
"channel_id": "neynar",
"embeds": [
{
"cast_id": {
"fid": 3,
"hash": "<string>"
}
}
],
"idem": "<string>",
"parent": "<string>",
"parent_author_fid": 3,
"text": "<string>"
}
'import requests
url = "https://api.neynar.com/v2/farcaster/cast/"
payload = {
"signer_uuid": "19d0c5fd-9b33-4a48-a0e2-bc7b0555baec",
"channel_id": "neynar",
"embeds": [{ "cast_id": {
"fid": 3,
"hash": "<string>"
} }],
"idem": "<string>",
"parent": "<string>",
"parent_author_fid": 3,
"text": "<string>"
}
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',
channel_id: 'neynar',
embeds: [{cast_id: {fid: 3, hash: '<string>'}}],
idem: '<string>',
parent: '<string>',
parent_author_fid: 3,
text: '<string>'
})
};
fetch('https://api.neynar.com/v2/farcaster/cast/', 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/cast/",
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',
'channel_id' => 'neynar',
'embeds' => [
[
'cast_id' => [
'fid' => 3,
'hash' => '<string>'
]
]
],
'idem' => '<string>',
'parent' => '<string>',
'parent_author_fid' => 3,
'text' => '<string>'
]),
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/cast/"
payload := strings.NewReader("{\n \"signer_uuid\": \"19d0c5fd-9b33-4a48-a0e2-bc7b0555baec\",\n \"channel_id\": \"neynar\",\n \"embeds\": [\n {\n \"cast_id\": {\n \"fid\": 3,\n \"hash\": \"<string>\"\n }\n }\n ],\n \"idem\": \"<string>\",\n \"parent\": \"<string>\",\n \"parent_author_fid\": 3,\n \"text\": \"<string>\"\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/cast/")
.header("x-api-key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"signer_uuid\": \"19d0c5fd-9b33-4a48-a0e2-bc7b0555baec\",\n \"channel_id\": \"neynar\",\n \"embeds\": [\n {\n \"cast_id\": {\n \"fid\": 3,\n \"hash\": \"<string>\"\n }\n }\n ],\n \"idem\": \"<string>\",\n \"parent\": \"<string>\",\n \"parent_author_fid\": 3,\n \"text\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.neynar.com/v2/farcaster/cast/")
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 \"channel_id\": \"neynar\",\n \"embeds\": [\n {\n \"cast_id\": {\n \"fid\": 3,\n \"hash\": \"<string>\"\n }\n }\n ],\n \"idem\": \"<string>\",\n \"parent\": \"<string>\",\n \"parent_author_fid\": 3,\n \"text\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"cast": {
"author": {
"fid": 3
},
"hash": "0x71d5225f77e0164388b1d4c120825f3a2c1f131c",
"text": "<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
🔗 SDK Method: publishCast Use this API endpoint with the Neynar Node.js SDK for typed responses and better developer experience.Authorizations
API key to authorize requests
Body
application/json
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"
Channel ID of the channel where the cast is to be posted. e.g. neynar, farcaster, warpcast
Example:
"neynar"
Maximum array length:
2- PostCastReqBodyEmbeds
- PostCastReqBodyEmbeds
- PostCastReqBodyEmbeds
Show child attributes
Show child attributes
An Idempotency key is a unique identifier for the request. Note:
- This is used to prevent duplicate requests. Use the same idem key on retry attempts.
- This should be a unique identifier for each request.
- Recommended format is a 16-character string generated by the developer at the time of making this request.
parent_url of the channel the cast is in, or hash of the cast
The unique identifier of a farcaster user or app (unsigned integer)
Required range:
x >= 0Example:
3
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