Midjourney API is a RESTful service that enables developers to generate AI images using Midjourney models programmatically, without requiring direct interaction with Discord. Its primary function is to accept text prompts via a REST API and return image URLs through webhook callbacks or job status polling. The service supports both fast generation and relax mode, allowing users to balance speed and cost on a per request basis. It also supports Niji models, aspect ratio parameters, and all standard Midjourney parameters. Authentication is handled through a single API key header, and the service can handle up to 10 concurrent image generation jobs. The API is designed for integration into automated and repeatable workflows. Developers can submit prompts using Python, Node.js, or any HTTP client, and receive results asynchronously by providing a hookUrl, eliminating the need for constant polling. Alternatively, job status and image URLs can be retrieved with a single POST call. The service supports fast and relax modes, webhook callbacks, and job status polling, making it suitable for high throughput systems. Typical use cases include embedding image generation into customer facing product flows, producing campaign visuals, mockups, and seasonal assets, and attaching generation to editorial, CMS, and publishing workflows. It can also be integrated with other AI models, such as GPT Image 2, to create a versatile generative engine. The API is designed for developers who need to submit hundreds of prompts programmatically and receive results via webhook, replacing fragile Discord bot automation with a stable REST API. Technical details include support for Python, Node.js, and any HTTP client. Authentication is handled with a single API key header. The service supports up to 10 concurrent requests, job status polling, and webhook callbacks. Plans start at $10 for 1,300 quota, which equates to approximately 650 images in relax mode, with larger plans up to $1,200 offering up to 10 percent bonus quota. The API is a RESTful wrapper that fills the gap left by Midjourney's lack of a public API, allowing developers to integrate image generation into customer facing product flows, premium plans, editorial workflows, and other automated systems.