NVIDIA NIM Completions API
Legacy OpenAI-compatible text completion endpoint (/v1/completions) for non-chat foundation models served by NIM. Accepts a raw prompt and returns generated text with the same streaming, sampling, and stopping-criterion controls as the chat endpoint.
NVIDIA NIM Completions API is one of 11 APIs that NVIDIA NIM publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include AI, Artificial Intelligence, Completions, LLM, and OpenAI Compatible. The published artifact set on APIs.io includes API documentation and an OpenAPI specification.
This API exposes 1 operation across 1 path, and defines 2 schemas. It is described by OpenAPI 3.1.0, at version 2026-05-25.
Requests are made against 2 base URLs: https://integrate.api.nvidia.com, http://localhost:8000.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
NVIDIA NIM Completions API declares
1 security scheme
for authenticating requests.
It accepts HTTP bearer tokens (nvapi-...) (BearerAuth).
By default, every request must be authenticated.
Paths & Operations 1
Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.
Legacy text completion operations
Schemas 2
The contract defines 2 schemas that model the data the API accepts and returns. The most detailed are CompletionRequest (13 properties), CompletionResponse (6 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
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