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OpenAI APIs Chat API

Chat completion operations

OpenAI APIs Chat API is one of 12 APIs that OpenAI APIs publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Chat. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 1 operation across 1 path, and defines 6 schemas. It is described by OpenAPI 3.1.0, at version 2.0.

Requests are made against a single base URL, https://api.openai.com/v1.

1 operations 1 paths 6 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.1.0
API Version
2.0
Base URL
https://api.openai.com/v1
Authentication
HTTP Bearer
Terms of Service
Resource Areas
1

Authentication & Security 1

OpenAI APIs Chat API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (API Key) (bearerAuth). By default, every request must be authenticated.

  • bearerAuth — OpenAI API key passed as a Bearer token

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.

Chat 1

Chat completion operations

POST
/chat/completions
OpenAI APIs Create chat completion
createChatCompletion body → 200400401429500

Schemas 6

The contract defines 6 schemas that model the data the API accepts and returns. The most detailed are CreateChatCompletionRequest (17 properties), ChatCompletionResponse (7 properties), ChatMessage (5 properties), ToolCall (3 properties). Each schema is shown below with its type and property counts.

ChatMessage
object
5 properties 2 required
Usage
object
3 properties
ChatCompletionResponse
object
7 properties
Tool
object
2 properties 2 required
CreateChatCompletionRequest
object
17 properties 2 required
ToolCall
object
3 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

openai-apis-chat-api-openapi.yml Raw ↑

Other APIs OpenAI APIs publishes across the network.

OpenAI APIs Assistants API
OpenAI APIs Completions API
OpenAI APIs Embeddings API
OpenAI APIs Images API
OpenAI APIs Messages API
OpenAI APIs Moderations API
OpenAI APIs Runs API
OpenAI APIs Speech API
OpenAI APIs Threads API
OpenAI APIs Transcription API
OpenAI APIs Translation API
Where this information came from

This is an independent, third-party profile of OpenAI APIs Chat API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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