OpenAI

OpenAI Conversations API

Manage conversations and conversation items.

Documentation GitHub OpenAPI

Operations 8

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

POST /conversations/{conversation_id}/items Add items to a conversation · Create items #

Ask an LLM

“Can I append new messages to an existing conversation?”

“Is it possible to add several items to a conversation in one call?”

Tell an agent

Add items {items} to conversation {conversation_id}.

Append these messages to existing conversation {conversation_id}: {items}.

GET /conversations/{conversation_id}/items List the items in a conversation · List items #

Ask an LLM

“How do I read back everything said in a stored conversation?”

“Can I list a conversation's items oldest first?”

Tell an agent

List the items in conversation {conversation_id}.

Show the last {limit} items of conversation {conversation_id}.

GET /conversations/{conversation_id}/items/{item_id} Retrieve one item from a conversation · Retrieve an item #

Ask an LLM

“What does a single message in a conversation contain?”

“Can I fetch one conversation item by its item ID?”

Tell an agent

Get item {item_id} from conversation {conversation_id}.

Show the content of conversation item {item_id} in {conversation_id}.

DELETE /conversations/{conversation_id}/items/{item_id} Delete an item from a conversation · Delete an item #

Ask an LLM

“Can I remove one message from a conversation's history?”

“How do I delete a single item without deleting the whole conversation?”

Tell an agent destructive · confirm first

Delete item {item_id} from conversation {conversation_id}.

Remove message {item_id} from the history of conversation {conversation_id}.

POST /conversations Create a conversation · Create a conversation #

Ask an LLM

“How do I create a persistent conversation to keep state across responses?”

“Can I start a new conversation with some initial messages already in it?”

Tell an agent

Create a new conversation.

Start a conversation seeded with items {items} and metadata {metadata}.

GET /conversations/{conversation_id} Retrieve a conversation · Retrieve a conversation #

Ask an LLM

“What metadata is attached to one of my conversations?”

“Can I look up a conversation by its ID to confirm it still exists?”

Tell an agent

Get conversation {conversation_id}.

Show the details and metadata of conversation {conversation_id}.

DELETE /conversations/{conversation_id} Delete a conversation · Delete a conversation #

Ask an LLM

“Does deleting a conversation also delete the items inside it?”

“What's the way to remove a whole conversation by ID?”

Tell an agent destructive · confirm first

Delete conversation {conversation_id}.

Remove the entire conversation {conversation_id}.

POST /conversations/{conversation_id} Update a conversation's metadata · Update a conversation #

Ask an LLM

“Can I tag a conversation with my own customer or session IDs?”

“How do I change the metadata on an existing conversation?”

Tell an agent

Set metadata {metadata} on conversation {conversation_id}.

Replace the metadata of conversation {conversation_id} with {metadata}.

Documentation

https://platform.openai.com/docs/assistants/overview

https://platform.openai.com/docs/api-reference/assistants

https://platform.openai.com/docs/guides/text-to-speech

https://platform.openai.com/docs/api-reference/audio

https://platform.openai.com/docs/guides/speech-to-text

https://developers.openai.com/api/docs/guides/audio/

https://developers.openai.com/api/docs/guides/voice-agents/

https://platform.openai.com/docs/api-reference/chat

https://platform.openai.com/docs/guides/embeddings

https://platform.openai.com/docs/api-reference/embeddings

https://platform.openai.com/docs/api-reference/files

https://platform.openai.com/docs/guides/fine-tuning

https://platform.openai.com/docs/api-reference/fine-tuning

https://platform.openai.com/docs/guides/images

https://platform.openai.com/docs/api-reference/images

https://platform.openai.com/docs/guides/image-generation

https://platform.openai.com/docs/guides/images-vision

https://platform.openai.com/docs/models

https://platform.openai.com/docs/api-reference/models

https://platform.openai.com/docs/assistants/how-it-works/managing-threads-and-messages

https://platform.openai.com/docs/api-reference/threads

https://platform.openai.com/docs/api-reference/completions

Specifications

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/openapi/openai-conversations-api-openapi.yml

Schemas & Data

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/json-schema/openai-chat-completion-schema.json

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/json-schema/openai-embedding-schema.json

Other Resources

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/json-ld/openai-context.jsonld

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OpenAPI Specification

openapi: 3.2.0
info:
  title: OpenAI Conversations API
  description: The OpenAI REST API. Please see https://platform.openai.com/docs/api-reference for more details.
  version: 2.3.0
  termsOfService: https://openai.com/policies/terms-of-use
  contact:
    name: OpenAI Support
    url: https://help.openai.com/
  license:
    name: MIT
    identifier: MIT
servers:
- url: https://api.openai.com/v1
security:
- ApiKeyAuth: []
tags:


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# Full source: https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/openapi/openai-conversations-api-openapi.yml