Excession Labs provides API access to DeepSeek language models, including DeepSeek V4.1 Flash and Flash Abliterated. The service is designed to allow developers and businesses to integrate these models into their applications through a standard API that is compatible with OpenAI and Anthropic formats, supporting features such as streaming responses and tool calls. Users can obtain an API key after signing in and selecting a payment plan or adding funds. The platform offers two primary pricing structures: a pay-as-you-go option starting at ten dollars, where the balance never expires as long as the account remains open, and monthly subscription plans. The Ultra plan costs five hundred dollars per month and provides one thousand two hundred fifty dollars in credit, which must be fully used before the monthly renewal to achieve the listed effective rates. Plan credit is applied to usage at list prices and expires at renewal. Each plan is intended for a single person. Usage costs are calculated based on input tokens, including cached tokens, and output tokens, including reasoning tokens. Requests first consume plan credit, then any remaining balance. Typical use cases involve making API requests to generate text, complete code, or perform other language tasks using DeepSeek models. The workflow includes signing in, selecting a plan or adding funds, creating an API key, and setting the base URL and model ID in the client application. The service also provides an API reference, a setup guide, and documentation for using DeepSeek in tools such as Claude Code and OpenCode. An abliterated API variant is available. The Acceptable Use Policy applies to all models, and error codes are returned for issues such as spend order errors.