Best OpenAI MCP Servers

OpenAI is an AI research and deployment company dedicated to ensuring that artificial general intelligence benefits all of humanity.

View all OpenAI MCP Servers

Why this server?
Allows OpenAI assistants (like ChatGPT/Codex) to connect to a BillingServ account for querying billing data and performing actions such as creating invoices or support tickets.
BillingServ MCPofficial
Payments & Billing Finance
BillingServ
A
license
A
quality
C
maintenance
This is an MCP server for the BillingServ API. Once it's set up, your AI assistant can look up customers, invoices, orders, packages, and reports straight from your BillingServ installation
Last updated 2026-07-04
4
3
246
MIT
Why this server?
Provides integration with OpenAI's API for chat completion with automatic verification and self-healing.
Correctover MCP Serverofficial
AI & Machine Learning Monitoring Testing & QA Tools
Correctover
A
license
A
quality
A
maintenance
Verifies AI outputs in real-time across 6 dimensions, with automatic retry and failover to ensure correct, complete, and reliable LLM responses before they reach the user's editor.
Last updated 2026-07-18
6
5
363
1
Apache 2.0
Why this server?
Provides integration with OpenAI's AI models for tool-use orchestration within agent skills, enabling AI agents to leverage elisym's decentralized marketplace capabilities through OpenAI's platform.
elisymofficial
Agent Orchestration Blockchain Web3 & Decentralized Tech
elisymlabs
A
license
A
quality
B
maintenance
Lets AI assistants (Claude, Cursor, Windsurf) discover, hire, and pay other AI agents over the elisym network - decentralized agent marketplace on Nostr with on-chain Solana payments. Customer-mode tools for agent discovery, job submission, wallet management, and identity.
Last updated 2026-07-16
25
10
MIT
Why this server?
Optional integration for server-side natural language processing to transform natural language security requirements into Cerbos YAML policies using OpenAI GPT models.
GlassTape Policy Builderofficial
Security Legal & Compliance Autonomous Agents
GlassTape
A
license
A
quality
D
maintenance
Converts natural language security requirements into validated Cerbos YAML policies with automated testing and red-team analysis, enabling AI governance with zero-trust guardrails for tool calls, data access, and compliance frameworks.
Last updated 2025-11-02
5
3
Apache 2.0
Why this server?
Allows OpenAI Agents to access text-to-speech, voice cloning, video translation, subtitle removal, and other audio/video processing capabilities.
All Voice Lab MCP Serverofficial
Multimedia Processing Audio Processing Language Translation
allvoicelab
A
license
A
quality
D
maintenance
All Voice Lab MCP Server
Last updated 2025-08-05
12
56
MIT
Why this server?
Supports OpenAI models for AI-powered document signing, template management, and eSignature workflow automation
SignNow MCP Serverofficial
App Automation Legal & Compliance Workplace & Productivity
signnow
A
license
A
quality
B
maintenance
https://github.com/signnow/sn-mcp-server MCP server for SignNow e-signature: templates, invites, embedded signing/editor, status & downloads.
Last updated 2026-07-14
25
7
MIT
Why this server?
Allows OpenAI Codex CLI to delegate work to Claude Code as a sub-agent via MCP tools.
claude-cli-mcp
Coding Agents Code Execution Autonomous Agents
nayagamez
A
license
A
quality
D
maintenance
Wraps Anthropic Claude Code CLI as tools, allowing MCP clients to invoke headless Claude Code sessions.
Last updated 2026-04-23
2
2
22
MIT
Why this server?
Planned auto-capture integration for OpenAI Codex to record all agent decisions and actions as Context Passport records.
DarkMatter MCP Serverofficial
Autonomous Agents Security
darkmatter-hub
A
license
A
quality
B
maintenance
Universal MCP server that emits Context Passport records for AI agent decisions and actions. Drop into any MCP-compatible client to give your agent a commit/verify/replay/export toolset for verifiable, tamper-evident records.
Last updated 2026-05-19
5
12
Apache 2.0
Why this server?
Provides persistent, encrypted, local-first memory for OpenAI Codex agents, enabling them to retain context across sessions.
Perseus Vault Codexofficial
Knowledge & Memory Developer Tools
Perseus-Computing-LLC
A
license
A
quality
B
maintenance
A tiny MCP server that wraps Perseus Vault to provide persistent, encrypted, local-first memory for OpenAI Codex agents, enabling them to remember project conventions, decisions, and context across sessions.
Last updated 2026-07-15
5
MIT