## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.neynar.com/llms.txt)

Use this file to discover all available pages before exploring further.

On cast

### cURL

```
curl --request GET \
  --url 'https://snapchain-api.neynar.com/v1/reactionsByCast?reaction_type=Like' \
  --header 'x-api-key: NEYNAR_API_DOCS'
```

```
import requests

url = "https://snapchain-api.neynar.com/v1/reactionsByCast?reaction_type=Like"

headers = {"x-api-key": "NEYNAR_API_DOCS"}

response = requests.get(url, headers=headers)

print(response.text)
```

```
const options = {method: 'GET', headers: {'x-api-key': 'NEYNAR_API_DOCS'}};

fetch('https://snapchain-api.neynar.com/v1/reactionsByCast?reaction_type=Like', 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://snapchain-api.neynar.com/v1/reactionsByCast?reaction_type=Like",\
  CURLOPT_RETURNTRANSFER => true,\
  CURLOPT_ENCODING => "",\
  CURLOPT_MAXREDIRS => 10,\
  CURLOPT_TIMEOUT => 30,\
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,\
  CURLOPT_CUSTOMREQUEST => "GET",\
  CURLOPT_HTTPHEADER => [\
    "x-api-key: NEYNAR_API_DOCS"\
  ],\
]);

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

curl_close($curl);

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

```
package main

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

func main() {

url := "https://snapchain-api.neynar.com/v1/reactionsByCast?reaction_type=Like"

req, _ := http.NewRequest("GET", url, nil)

req.Header.Add("x-api-key", "NEYNAR_API_DOCS")

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

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

fmt.Println(string(body))
}
```

```
HttpResponse<String> response = Unirest.get("https://snapchain-api.neynar.com/v1/reactionsByCast?reaction_type=Like")
  .header("x-api-key", "NEYNAR_API_DOCS")
  .asString();
```

```
require 'uri'
require 'net/http'

url = URI("https://snapchain-api.neynar.com/v1/reactionsByCast?reaction_type=Like")

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

request = Net::HTTP::Get.new(url)
request["x-api-key"] = 'NEYNAR_API_DOCS'

response = http.request(request)
puts response.read_body
```

### Response

200

#### default

```
{
  "messages": [\
    {\
      "hash": "0xd2b1ddc6c88e865a33cb1a565e0058d757042974",\
      "hashScheme": "HASH_SCHEME_BLAKE3",\
      "signature": "aSDinaTvuI8gbWludGxpZnk=",\
      "signatureScheme": "SIGNATURE_SCHEME_ED25519",\
      "signer": "<string>",\
      "data": {\
        "type": "MESSAGE_TYPE_CAST_ADD",\
        "fid": 2,\
        "timestamp": 48994466,\
        "network": "FARCASTER_NETWORK_MAINNET",\
        "reactionBody": {\
          "type": "Like",\
          "targetCastId": {\
            "fid": 2,\
            "hash": "0x03aff391a6eb1772b20b4ead9a89f732be75fe27"\
          },\
          "targetUrl": "https://www.example.com/article"\
        }\
      }\
    }\
  ],
  "nextPageToken": "AuzO1V0DtaItCwwa10X6YsfStlynsGWT"
}
```

```
{
  "errCode": "<string>",
  "presentable": true,
  "name": "<string>",
  "code": 123,
  "details": "<string>",
  "metadata": {
    "errcode": [\
      "<string>"\
    ]
  }
}
```

### Authorizations

**x-api-key**  
string  
header  
default:NEYNAR_API_DOCS  
required  
API key to authorize requests

### Query Parameters

**target_fid**  
integer<uint64>  
required  
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.
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.
Required range: `x >= 1`

Example:

`1`

**target_hash**  
string  
required  
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.
Pattern: `^0x[0-9a-fA-F]{40}$`

Example:

`"0xfec8fd3546e1f46cf5ad10a4ff9f5d53a3bbe9be"`

**reaction_type**  
enum<string>  
default:Like  
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.

Available options:

`Like`,

`Recast`

Example:

`"Like"`

**pageSize**  
integer  
Maximum number of messages to return in a single response

**reverse**  
boolean  
Reverse the sort order, returning latest messages first

**pageToken**  
string  
The page token returned by the previous query, to fetch the next page. If this parameter is empty, fetch the first page.

### Response

200

application/json

The requested Reactions.