Content
Generate a social caption
Writes ONE platform-tuned social caption (with hashtags) for a short-form video. Billed per request; refunded on failure.
POST
/
content
/
caption
Generate a social caption
curl --request POST \
--url https://api.smartlyq.com/v1/content/caption \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"tone": "engaging",
"title": "<string>",
"content": "<string>",
"current_caption": "<string>",
"instruction": "<string>"
}
'import requests
url = "https://api.smartlyq.com/v1/content/caption"
payload = {
"tone": "engaging",
"title": "<string>",
"content": "<string>",
"current_caption": "<string>",
"instruction": "<string>"
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
tone: 'engaging',
title: '<string>',
content: '<string>',
current_caption: '<string>',
instruction: '<string>'
})
};
fetch('https://api.smartlyq.com/v1/content/caption', 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.smartlyq.com/v1/content/caption",
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([
'tone' => 'engaging',
'title' => '<string>',
'content' => '<string>',
'current_caption' => '<string>',
'instruction' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($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.smartlyq.com/v1/content/caption"
payload := strings.NewReader("{\n \"tone\": \"engaging\",\n \"title\": \"<string>\",\n \"content\": \"<string>\",\n \"current_caption\": \"<string>\",\n \"instruction\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
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.smartlyq.com/v1/content/caption")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"tone\": \"engaging\",\n \"title\": \"<string>\",\n \"content\": \"<string>\",\n \"current_caption\": \"<string>\",\n \"instruction\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.smartlyq.com/v1/content/caption")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"tone\": \"engaging\",\n \"title\": \"<string>\",\n \"content\": \"<string>\",\n \"current_caption\": \"<string>\",\n \"instruction\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"success": true,
"data": {
"caption": "We just doubled our reach in 30 days - here is the exact playbook 🧵"
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}{
"success": false,
"error": {
"code": "INVALID_API_KEY",
"message": "Missing or malformed Authorization header",
"details": {}
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}{
"success": false,
"error": {
"code": "INSUFFICIENT_BALANCE",
"message": "Wallet balance is insufficient for this request",
"details": {
"required": "0.0250",
"balance": "0.0100"
}
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}{
"success": false,
"error": {
"code": "INSUFFICIENT_SCOPE",
"message": "API key lacks required scope: social:write",
"details": {
"required_scope": "social:write"
}
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}{
"success": false,
"error": {
"code": "VALIDATION_ERROR",
"message": "Missing required fields: content, platforms.",
"details": {
"fields": [
"content",
"platforms"
]
}
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}Authorizations
API key from Developer dashboard (Bearer token).
Body
application/json
Destination platform (sets length + voice).
Available options:
twitter, tiktok, instagram, facebook, linkedin, youtube What the video says (transcript) so the caption is on-topic.
An existing caption to improve.
Extra instruction, e.g. 'add a CTA'.
Previous
Keyword researchKeyword suggestions for a seed keyword with real monthly search volume, CPC and competition.
Next
⌘I
Generate a social caption
curl --request POST \
--url https://api.smartlyq.com/v1/content/caption \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"tone": "engaging",
"title": "<string>",
"content": "<string>",
"current_caption": "<string>",
"instruction": "<string>"
}
'import requests
url = "https://api.smartlyq.com/v1/content/caption"
payload = {
"tone": "engaging",
"title": "<string>",
"content": "<string>",
"current_caption": "<string>",
"instruction": "<string>"
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
tone: 'engaging',
title: '<string>',
content: '<string>',
current_caption: '<string>',
instruction: '<string>'
})
};
fetch('https://api.smartlyq.com/v1/content/caption', 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.smartlyq.com/v1/content/caption",
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([
'tone' => 'engaging',
'title' => '<string>',
'content' => '<string>',
'current_caption' => '<string>',
'instruction' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($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.smartlyq.com/v1/content/caption"
payload := strings.NewReader("{\n \"tone\": \"engaging\",\n \"title\": \"<string>\",\n \"content\": \"<string>\",\n \"current_caption\": \"<string>\",\n \"instruction\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
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.smartlyq.com/v1/content/caption")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"tone\": \"engaging\",\n \"title\": \"<string>\",\n \"content\": \"<string>\",\n \"current_caption\": \"<string>\",\n \"instruction\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.smartlyq.com/v1/content/caption")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"tone\": \"engaging\",\n \"title\": \"<string>\",\n \"content\": \"<string>\",\n \"current_caption\": \"<string>\",\n \"instruction\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"success": true,
"data": {
"caption": "We just doubled our reach in 30 days - here is the exact playbook 🧵"
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}{
"success": false,
"error": {
"code": "INVALID_API_KEY",
"message": "Missing or malformed Authorization header",
"details": {}
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}{
"success": false,
"error": {
"code": "INSUFFICIENT_BALANCE",
"message": "Wallet balance is insufficient for this request",
"details": {
"required": "0.0250",
"balance": "0.0100"
}
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}{
"success": false,
"error": {
"code": "INSUFFICIENT_SCOPE",
"message": "API key lacks required scope: social:write",
"details": {
"required_scope": "social:write"
}
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}{
"success": false,
"error": {
"code": "VALIDATION_ERROR",
"message": "Missing required fields: content, platforms.",
"details": {
"fields": [
"content",
"platforms"
]
}
},
"meta": {
"request_id": "req_9f3a2b1c-7d4e-4a08-b2c6-5e1f8a9d0c34",
"timestamp": "2026-07-26T09:41:22Z"
}
}
