What is an API endpoint?
An API is a contract. An endpoint is a specific clause in that contract: a defined URL that accepts a specific type of request and returns a specific type of response.
Definition
An API endpoint is a URL that serves as the access point for a specific function in an API. Each endpoint accepts defined input parameters, performs an operation, and returns a structured response. In a video generation API, a generation endpoint accepts a prompt and configuration parameters, triggers a generation job, and returns either the generated content or a job identifier for asynchronous retrieval.
Types of endpoints in a video generation API
Generation endpoints accept generation parameters (prompt, resolution, duration, sampling steps, conditioning inputs) and initiate a generation job. For computationally expensive operations like video generation, these typically return a job ID rather than waiting for the video to be ready.
Status endpoints accept a job ID and return the current state of the job: queued, processing, complete, or failed. Production pipelines poll status endpoints to know when results are ready, or use webhooks to receive notifications automatically.
Result endpoints return the completed output: either the generated video file, or a signed URL from which the file can be downloaded.
Account and usage endpoints return information about API keys, rate limits, remaining quota, and billing data.
Model listing endpoints return available models, their capabilities, and their pricing, allowing applications to programmatically select models based on task requirements.
Endpoint authentication
Most API endpoints require authentication via an API key, passed either as a request header (Authorization: Bearer {api_key}) or as a query parameter. API keys should be kept secret, stored in environment variables rather than hardcoded, and rotated periodically.
For enterprise deployments, token-based authentication with scoped permissions and key rotation policies is standard.
Designing around endpoint latency
Video generation is not a fast operation. Even an efficient model like LTX-2 takes seconds to generate a clip. Endpoint design for video generation must account for this.
Synchronous endpoints wait for generation to complete before responding. They are simple to implement but block the calling thread for the duration of generation, which creates timeout and resource management problems at scale.
Asynchronous endpoints return immediately with a job identifier. The client polls the status endpoint or receives a webhook notification when the job completes. This pattern is better suited to production video generation pipelines.
LTX-2 API endpoints
The LTX-2 API exposes generation endpoints for text-to-video, image-to-video, and audio-to-video generation modes. All generation is asynchronous: submitting a generation request returns a job ID, and the completed video is retrieved once the job status returns as complete.
Full endpoint documentation, request schemas, and code examples are available at docs.ltx.video. For hands-on exploration before integration, the ComfyUI workflow guide shows how to connect the API endpoints to a local node-based workflow.
