API in One: The All-in-One AI API Platform for Developers

One API key to rule them all. API in One gives developers access to 50+ AI models through a single, unified API endpoint.

What is API in One?

API in One is a unified AI API aggregation platform designed for developers who need access to multiple AI models without the hassle of managing separate accounts, API keys, and billing with different providers.

Instead of signing up for Suno, ElevenLabs, Flux, Kling, Google Gemini, and dozens of other AI services separately, you get one API key that works across all of them.

Why Use API in One?

The Problem

Building with AI today means juggling:

• Multiple provider accounts
• Different API formats and authentication methods
• Separate billing and credit systems
• Inconsistent error handling and response formats

The Solution

API in One solves all of this with:

• One API Key — A single Bearer token for every AI model
• Unified Format — Consistent JSON request/response format across all models
• One Credit Balance — Pay-as-you-go credits that work across every model
• One Dashboard — Monitor usage, manage keys, and view logs in one place

Available Model Categories

🖼️ Image Generation

Generate photorealistic images from text descriptions using models like Flux 2 by Black Forest Labs.

curl -X POST https://apiin.one/api/v1/images/generations \
  -H "Authorization: Bearer aio_your_key" \
  -d '{"model": "flux-2", "prompt": "A futuristic cityscape at sunset"}'

🎬 Video Generation

Create AI-generated videos with models like Kling 3.0 by Kuaishou — supporting text-to-video and image-to-video.

🎵 Music Generation

Generate original songs, instrumentals, and custom lyrics with Suno AI’s music generation model.

🗣️ Text to Speech

Convert text to natural-sounding speech using ElevenLabs V3 with multiple voices and languages.

🤖 Chat / LLM

Access large language models like Google Gemini through an OpenAI-compatible chat completions endpoint.

🛠️ AI Tools

Image processing tools like Background Remover for quick, automated image editing.

Getting Started

Step 1: Create Your Account

Sign up at apiin.one and get your free API key from the dashboard. New accounts include bonus credits to explore the platform.

Step 2: Make Your First API Call

curl -X POST https://apiin.one/api/v1/images/generations \
  -H "Authorization: Bearer aio_your_key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux-2",
    "prompt": "A serene Japanese garden with cherry blossoms and koi pond"
  }'

Step 3: Check Task Status

For asynchronous tasks (video, music, TTS), poll the status endpoint:

curl https://apiin.one/api/v1/tasks/task_abc123 \
  -H "Authorization: Bearer aio_your_key"

Step 4: Explore More Models

Browse the Model Directory to discover all available AI models and their capabilities.

Pricing

API in One uses a pay-as-you-go credit system:

Category	Example Model	Credits/Call
Image Generation	Flux 2	10
Video Generation	Kling 3.0	50
Music Generation	Suno	20
Text to Speech	ElevenLabs V3	5
Chat / LLM	Gemini	2
AI Tools	Background Remover	3

No monthly subscriptions. No hidden fees. Purchase credits as needed and use them across any model.

FAQ

What models are available? We currently support 50+ models across image generation, video generation, music, text-to-speech, chat, and AI tools. New models are added regularly.

Is there a free trial? Yes! New accounts receive free bonus credits to explore the platform and test any model.

Do I need separate API keys for each model? No. One API key works across all models. Simply specify the model name in your request body.

What happens if my credits run out? API requests will return a 402 error. No data is lost — simply purchase more credits to continue.

Can I use API in One for commercial projects? Absolutely. All models are available for commercial use, subject to each provider’s terms of service.

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Ready to build with AI? Get your free API key and start making requests in minutes.