OpenAI APIs OpenAI Assistants Messages API
API for building AI assistants with custom instructions, knowledge retrieval, code execution, and function calling capabilities. Supports managing assistants, threads, messages, and runs. Contact Support: Name: OpenAI Support Email: support@openai.com
Overview
OpenAI APIs OpenAI Assistants Messages API is a Postman Collection published by OpenAI APIs on the APIs.io network.
API for building AI assistants with custom instructions, knowledge retrieval, code execution, and function calling capabilities. Supports managing assistants, threads, messages, and runs. Contact Support: Name: OpenAI Support Email: support@openai.com
The collection contains 3 requests organised into 4 folders.
Tagged areas include Artificial Intelligence, Embeddings, Image-Generation, Language Models, and Speech.
Requests & Folders
Related API Specs
Work with this as data
Every collection here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for collections
4 MCP tools reach this
find_collectionsBrowse and filter every collection in the catalog.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
curl "https://apis.io/api/v1/collections/postman-openai-apis-messages-api"curl "https://apis.io/api/v1/collections?limit=25"Discovery needs no key. Ratings and market analysis are Pro.