Connect
Optimize
Secure
OpenAI MCP Server
for AI Agents
Production-ready OpenAI MCP server with 110 extensible actions — plus built-in authentication, security, and optimized execution.
OpenAI MCP Server
Built by 
StackOne
StackOne 
Coverage
110 Agent Actions
Create, read, update, and delete across OpenAI — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your OpenAI MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every OpenAI tool response scanned for prompt injection in milliseconds — 88.7% accuracy, all running on CPU.
Prompt Injection Defense →
Performance
Max Agent Context. Min Cost.
Free up to 96% of your agent's context window to enhance reasoning and reduce cost, on every OpenAI call.
Tools Discovery →What is the OpenAI MCP Server?
A OpenAI MCP server lets AI agents read and write OpenAI data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's OpenAI MCP server ships with 110 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, and optimized agent context. Connect it from MCP clients like Claude Desktop, Cursor, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.
All OpenAI MCP Tools and Actions
Every action from OpenAI's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Models
- List Models
List all currently available models with their permissions and metadata.
- Retrieve Model
Get detailed information about a specific model.
Responses
- Create Response
Create a response using the new Responses API (replaces Assistants).
- Retrieve Response
Retrieve a response by its ID.
- Delete Response
Delete a response by its ID.
Conversations
- Create Conversation
Create a conversation.
- Retrieve Conversation
Get a conversation.
- Update Conversation
Update a conversation.
- Delete Conversation
Delete a conversation.
Conversation Items
- Create Conversation Items
Create items in a conversation.
- List Conversation Items
List all items for a conversation.
- Retrieve Conversation Item
Get a single item from a conversation.
- Delete Conversation Item
Delete an item from a conversation.
Containers
- Create Container
Create a new container.
- Retrieve Container
Get a specific container by ID.
- List Containers
List all containers.
- Delete Container
Delete a container.
Container Files
- Create Container File
Upload a file to a container.
- List Container Files
List files in a container.
- Retrieve Container File
Get a specific file from a container.
- Delete Container File
Delete a file from a container.
Organization Users
- List Organization Users
Lists all of the users in the organization.
- Retrieve Organization User
Retrieves a user by their identifier.
- Delete Organization User
Deletes a user from the organization.
Organization Invites
- Create Organization Invite
Create an invite for a user to the organization.
- List Organization Invites
Returns a list of invites in the organization.
- Retrieve Organization Invite
Retrieves an invite.
- Delete Organization Invite
Delete an invite. If the invite has already been accepted, it cannot be deleted.
Organization Groups
- Create Organization Group
Creates a new group in the organization.
- List Organization Groups
Lists all groups in the organization.
- Update Organization Group
Updates a group's information.
- Delete Organization Group
Deletes a group from the organization.
Group Users
- Add Group User
Adds a user to a group.
- List Group Users
Lists the users assigned to a group.
- Remove Group User
Removes a user from a group.
Organization Roles
- Create Organization Role
Creates a custom role for the organization.
- List Organization Roles
Lists the roles configured for the organization.
- Update Organization Role
Updates an existing organization role.
- Delete Organization Role
Deletes a custom role from the organization.
Organization Projects
- Create Organization Project
Create a new project in the organization.
- List Organization Projects
Lists all of the projects in the organization.
- Retrieve Organization Project
Retrieves a project.
Project Users
- Create Project User
Adds a user to the project.
- List Project Users
Returns a list of users in the project.
- Retrieve Project User
Retrieves a user in the project.
- Delete Project User
Deletes a user from the project.
Project Service Accounts
- Create Project Service Account
Creates a new service account in the project.
- List Project Service Accounts
Returns a list of service accounts in the project.
- Retrieve Project Service Account
Retrieves a service account in the project.
- Delete Project Service Account
Deletes a service account from the project.
Project API Keys
- List Project API Keys
Returns a list of API keys in the project.
- Retrieve Project API Key
Retrieves an API key in the project.
- Delete Project API Key
Deletes an API key from the project.
Project Groups
- Add Project Group
Grants a group access to a project.
- List Project Groups
Lists the groups that have access to a project.
- Remove Project Group
Revokes a group's access to a project.
Admin API Keys
- Create Admin API Key
Create an admin API key for the organization.
- Retrieve Admin API Key
Retrieve an admin API key by ID.
- List Admin API Keys
List all admin API keys for the organization.
- Delete Admin API Key
Delete an admin API key.
Project Roles
- Create Project Role
Create a custom role for a project.
- List Project Roles
List all custom roles for a project.
- Update Project Role
Update a custom role for a project.
- Delete Project Role
Delete a custom role from a project.
Skills
- Create Skill
Create a new skill by uploading a ZIP file.
- Get Skill
Get a skill by its ID. Requires Skills API beta access.
- List Skills
List all skills for the current project.
- Update Skill
Update the default version pointer for a skill.
- Delete Skill
Delete a skill by its ID.
Skill Versions
- Create Skill Version
Create a new version of an existing skill.
- List Skill Versions
List all versions of a skill.
- Get Skill Version
Get a specific version of a skill.
- Delete Skill Version
Delete a specific version of a skill.
Other (37)
- Create Transcription
Transcribes audio into the input language.
- Create Translation
Translates audio into English.
- Create Speech
Generates audio from the input text.
- Create Client Secret
Create a Realtime client secret with session configuration.
- List Response Input Items
List input items for a specific response.
- Retrieve Container File Content
Download the actual content of a file from a container.
- List Group Organization Role Assignments
Lists the organization roles assigned to a group within the organization.
- List Project Rate Limits
Returns the rate limits per model for a project.
- Get Audio Speeches Usage
Get usage statistics for audio speech generation.
- Get Audio Transcriptions Usage
Get usage statistics for audio transcription.
- Get Code Interpreter Sessions Usage
Get usage statistics for code interpreter sessions.
- Get Completions Usage
Get usage statistics for completions.
- Get Embeddings Usage
Get usage statistics for embeddings.
- Get Images Usage
Get usage statistics for image generation.
- Get Moderations Usage
Get usage statistics for content moderation.
- Get Vector Stores Usage
Get usage statistics for vector stores.
- Get Costs
Get organization costs for audit logging.
- List Audit Logs
List audit log events for the organization.
- List Project Group Roles
List all roles assigned to a group in a project.
- List Project User Roles
List all roles assigned to a user in a project.
- Download Skill Content
Download a skill zip bundle by its ID.
- Download Skill Version Content
Download a specific version of a skill as a ZIP bundle.
- Delete Fine-tuned Model
Delete a fine-tuned model. You must have the Owner role.
- Count Response Input Tokens
Get input token counts for a request.
- Cancel Response
Cancel a model response with the given ID.
- Compact Response
Compact a conversation.
- Modify Organization User
Modifies a user's role in the organization.
- Assign Organization Role To Group
Assigns an organization role to a group within the organization.
- Unassign Organization Role From Group
Unassigns an organization role from a group within the organization.
- Modify Organization Project
Modifies a project in the organization.
- Archive Organization Project
Archives a project in the organization.
- Modify Project User
Modifies a user's role in the project.
- Modify Project Rate Limit
Updates a project rate limit.
- Assign Role To Project Group
Assign a role to a group in a project.
- Unassign Role From Project Group
Remove a role from a group in a project.
- Assign Role To Project User
Assign a role to a user in a project.
- Unassign Role From Project User
Remove a role from a user in a project.
Set Up Your OpenAI MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to OpenAI in under 10 lines of code.
MCP Clients
Agent Frameworks
JSON{
"mcpServers": {
"stackone": {
"command": "npx",
"args": [
"-y",
"mcp-remote@latest",
"https://api.stackone.com/mcp?x-account-id=<account_id>",
"--header",
"Authorization: Basic <YOUR_BASE64_TOKEN>"
]
}
}
}More AI & ML MCP Servers
OpenAI MCP Server Resources
MCP Code Mode: Keeping Tool Responses Out of Agent Context
Anthropic's code_execution processes data already in context. Custom MCP code mode keeps raw tool responses in a sandbox. 14K tokens vs 500.
11 min
Comparing BM25, TF-IDF, and Hybrid Search for MCP Tool Discovery
Benchmarking BM25, TF-IDF, and hybrid search for MCP tool discovery across 916 tools. The 80/20 TF-IDF/BM25 hybrid hits 21% Top-1 accuracy in under 1ms.
10 min
Indirect Prompt Injection Defense for MCP Tools: A Technical Guide
MCP tools that read emails, CRM records, and tickets are indirect prompt injection vectors. Here's how we built a two-tier defense that scans tool results in ~11ms.
12 min
OpenAI MCP Server FAQ
OpenAI MCP server vs direct API integration — what's the difference?
A OpenAI MCP server and direct API integration serve different use cases. Direct API integration is for software-to-software — backend code calling OpenAI. A OpenAI MCP server is for AI agents — MCP clients like Claude and Cursor, plus framework agents built with OpenAI, LangChain, or Vercel AI — discovering and calling OpenAI at runtime. StackOne provides both.
How does OpenAI authentication work for AI agents?
OpenAI authentication for AI agents works through a StackOne Connect Session. Create one via the dashboard or the SDK — you get an auth link and ready-to-paste config for Claude Desktop, Cursor, and other MCP clients. Your user authenticates their own OpenAI account; StackOne handles token exchange, storage, and refresh. Credentials never reach the LLM, and each user is isolated via
origin_owner_id.Are OpenAI MCP tools vulnerable to prompt injection?
Yes — OpenAI MCP tools can be vulnerable to indirect prompt injection. Any tool that reads user-written content — documents, messages, tickets, records, or free-text fields — is a potential vector. StackOne Defender scans every tool response before it enters the agent's context — regex patterns in ~1ms, then a MiniLM classifier in ~4ms. 88.7% accuracy, CPU-only.
What is the context bloat of a OpenAI agent and how do I avoid it?
Context bloat happens when OpenAI tool schemas and API responses eat your OpenAI agent's memory, preventing it from reasoning effectively. A single OpenAI query can return a massive JSON response, and connecting multiple tools compounds the problem. Tools Discovery and Code Mode reduce context bloat — loading only relevant tools per query and keeping raw responses out of the agent's context.
Can I limit which actions my OpenAI agent can access?
Yes — you can limit which actions your OpenAI agent can access directly from the StackOne dashboard. Toggle actions on or off, or restrict them to specific accounts, with no code changes to your agent. Session tokens can be scoped to exact actions so if one leaks, exposure stays contained.
Can I create custom agent actions for my OpenAI MCP server?
Yes — you can create custom agent actions for your OpenAI MCP server using Connector Builder. It's an integration agent your coding assistant (Claude Code, Cursor, or Copilot) can invoke to research OpenAI's API, generate production-ready connector YAML, test against the live API, and validate before you ship.
When should I NOT use a OpenAI MCP server?
Skip a OpenAI MCP server if your integration is purely software-to-software — direct OpenAI API integration is simpler when no AI agent is involved. For deterministic, compliance-critical operations (financial transactions, regulatory reporting), direct API gives you predictable behavior without agent-driven decision-making. MCP shines when AI agents need to dynamically discover and call OpenAI actions at runtime.
What AI frameworks and AI clients does the StackOne OpenAI MCP server support?
The StackOne OpenAI MCP server supports both. MCP clients (paste-and-go apps): Claude Desktop, Claude Code, Cursor, VS Code, Goose. Agent frameworks (code SDKs you build with): OpenAI Agents SDK, Anthropic, Vercel AI, Google ADK, CrewAI, Pydantic AI, LangChain, LangGraph, Azure AI Foundry.
Put your AI agents to work
All the tools you need to build and scale AI agent integrations, with best-in-class connectivity, execution, and security.