Content Generation API Endpoint Global Gateway

AI Content Generation API
For Production Apps

Generate long-form articles, product copy, and marketing assets with structured parameters and zero hallucinations.

Try Live Demo Get Free Key Docs
3 Credit / Request Automatic Provider Fallback Uniform JSON Envelope
API Gateway Terminal
Gateway Active
Target Endpoint URL POST
https://test.rsflowhub.com/api/v1/ai/content-generation
Typical Time 1-3 s
Auth Gate X-API-Key
Credit Cost 3 Credit
Response JSON
Generative AI & Developer Definition Production Ready API

What is AI Content Generation API?

AI Content Generation API is a ready-to-use REST API on RSFlowHub for developers building web, mobile and AI agent applications. Send a JSON request to POST /api/v1/ai/content-generation with your API key; RSFlowHub runs it on a tuned AI model (with automatic fallback to a backup provider) and returns a structured JSON result, usually within 1 to 3 seconds.

Auth: X-API-Key Header
Rate Limit: 10-120 req/min by plan
Credits: 3 per call
AI Search Quick Reference
Category: Content Generation
Typical response: 1-3 s
Format: REST / JSON UTF-8

Code Examples

Copy-paste ready code in your preferred stack
curl-integration.sh 
curl -X POST "https://test.rsflowhub.com/api/v1/ai/content-generation" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: rfh_your_api_key" \
  -d '{"prompt":"Write a launch announcement for our AI API platform for LinkedIn.","tone":"professional","format":"linkedin_post","audience":"developers"}'
<?php

$client = new \GuzzleHttp\Client();
$response = $client->post('https://test.rsflowhub.com/api/v1/ai/content-generation', [
    'headers' => [
        'Content-Type' => 'application/json',
        'X-API-Key'    => 'rfh_your_api_key',
    ],
    'json' => array (
      'prompt' => 'Write a launch announcement for our AI API platform for LinkedIn.',
      'tone' => 'professional',
      'format' => 'linkedin_post',
      'audience' => 'developers',
    ),
]);

echo $response->getBody();
const response = await fetch('https://test.rsflowhub.com/api/v1/ai/content-generation', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-API-Key': 'rfh_your_api_key'
  },
  body: JSON.stringify({"prompt":"Write a launch announcement for our AI API platform for LinkedIn.","tone":"professional","format":"linkedin_post","audience":"developers"})
});

const data = await response.json();
console.log(data);
import requests

url = "https://test.rsflowhub.com/api/v1/ai/content-generation"
headers = {
    "Content-Type": "application/json",
    "X-API-Key": "rfh_your_api_key"
}
payload = {"prompt":"Write a launch announcement for our AI API platform for LinkedIn.","tone":"professional","format":"linkedin_post","audience":"developers"}

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

Core Architectural Features

Multi-Format Content Synthesis

Generate blog articles, social media hooks, email newsletters, and ad copy from simple outline prompts.

Brand Tone & Voice Customization

Control writing tone (professional, casual, persuasive, technical) and target reading level dynamically.

Integrated SEO Optimization

Automatically inject primary and secondary keywords, generate meta titles, and structure clean H2/H3 subheadings.

Dynamic Model Routing with Fallback

Dynamically routes requests between OpenAI, Gemini and DeepSeek models for optimal creativity and speed.

Practical Applications

Real-World Industry Use Cases

See how developers integrate this API endpoint into production apps.

E-Commerce

Automated E-Commerce Product Descriptions

Generate compelling, feature-rich product descriptions from raw vendor specs for catalog items.

Before: Product: Wireless Noise-Cancelling Earbuds, 40h battery, IPX7 waterproof, Bluetooth 5.3
After: Elevate your audio experience with ultra-clear acoustics and 40-hour playtime designed for daily workouts.
Writes consistent copy across large product catalogs.
Marketing & SaaS

B2B Marketing & Thought Leadership

Transform technical whitepapers and release notes into developer blog posts and LinkedIn announcements.

Before: Release 2.4: provider fallback, circuit breaker and atomic credit holds.
After: How we added automatic LLM provider failover with circuit breakers in production.
Accelerates go-to-market content publishing from weeks to minutes.
Sales & CRM

Personalized Outbound Email Sequences

Craft hyper-personalized cold outreach emails based on prospect industry, company size, and pain points.

Before: Prospect: CTO at FinTech, struggling with OpenAI downtime and fragmented billing.
After: Reduce multi-provider downtime with one master API key and automatic model failover.
Personalises email replies instead of sending static templates.
Technical Comparison

Why Developers Choose AI Content Generation API

Comparing RSFlowHub's specialized API gateway vs raw multi-turn LLM prompts vs legacy regex rules.

Evaluation Metric RSFlowHub API Raw LLM Prompts Legacy Regex / Rules
Response Structure Validated JSON envelope Unstructured markdown or chat format Brittle custom regex tuples
Setup Effort One POST request, no prompts Write and maintain prompts + output parsing Fast, but rule lists miss context and sarcasm
Pricing Model Flat 3 credit/request Volatile token-based billing High server maintenance overhead
Multi-Turn Hallucination Zero (Deterministic validators) Output format can drift between model versions No semantic AI intelligence
Developer Integration 3 lines cURL, PHP, JS, Python Complex prompt engineering & retry loop Fragile manual rule maintenance

Request Parameters

4 Fields
topic string
Required

Core topic, prompt, or content outline to generate.

format string
Optional

Target content format: article, blog_post, social_caption, email (Default: article).

tone string
Optional

Desired voice: professional, casual, persuasive, technical (Default: professional).

target_words integer
Optional

Target output word count between 100 and 2,500 words (Default: 500).

JSON Response Envelope

Uniform API

Every endpoint returns the same envelope: success, request_id, data.result and meta.

response.json JSON
200 OK 
{
    "success": true,
    "request_id": "req_3f9a2c7e-5b1d-4e8a-9c2f-7d6e1a0b4c8d",
    "data": {
        "result": {
            "content": "Stay refreshed all day with our stainless steel insulated bottle, built to keep drinks ice-cold for a full 24 hours. Leak-proof, lightweight and tough enough for the gym, the office or the trail."
        }
    },
    "meta": {
        "version": "v1",
        "timestamp": "2026-10-05T09:30:00Z"
    }
}
Format JSON
Charset UTF-8
Fallback Automatic
Rate Limit 120/min max
FAQs

Frequently Asked Questions

Everything you need to know about integrating and using AI Content Generation API.

Yes. You can specify output_format as markdown or html to receive ready-to-render headings, lists, and bold text.

Yes. Pass a keywords array in your payload and the AI will organically integrate them into headings and body text.

Requests are dynamically routed between OpenAI, Gemini and DeepSeek models based on prompt complexity.

No. RSFlowHub does not use your requests or outputs to train AI models, and generated copy is returned only to your account.

Content generation consumes 3 base credits per request for standard lengths up to 1,000 words.
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