Best LiveKit MCP MCP Server Alternatives 2026

Knowledge graph-based persistent memory system. Store and retrieve contextual information.

Free and open-source by Anthropic. Knowledge graph stored locally — no external service costs.

Dynamic and reflective problem-solving through thought sequences.

Free and open-source by Anthropic. Runs locally with no external API dependencies.

Exa's official MCP server connects AI assistants to a search engine purpose-built for AI, using neural embeddings to match on meaning rather than keywords so agents get clean, ready-to-use content instead of a page of blue links to re-parse. The default tool set covers web_search_exa for quick topical lookups and web_search_advanced_exa for full control over domains, date ranges, and content filters, plus specialized tools for code_search (searching real-world code and GitHub), company_research (building company profiles, competitor lists, and financials), crawling/web_fetch (pulling clean content from a specific URL), people_search and linkedin_search (public professional-profile lookups), and deep_researcher_start/check for long-running multi-step research tasks backed by Exa's Research API. The server is hosted at https://mcp.exa.ai/mcp — no local process to run — and connects via one-line setup in Cursor, VS Code, Claude Code, Claude Desktop (available as a native Connector), Codex, OpenCode, Windsurf, and Antigravity, authenticated with an EXA_API_KEY from the Exa dashboard. Tool exposure is tunable per client via a ?tools= query parameter on the endpoint URL, letting teams ship narrow, purpose-built configurations (e.g. company-research-only or LinkedIn-only agents) instead of exposing the full surface, and Exa ships ready-made Claude Skills/agent definitions for common patterns like company research and people search with built-in query-variation and token-isolation guidance.

The MCP server is free and open-source. Exa: Free tier with 1,000 searches/mo. Pro plans available for higher volume. See official pricing.

The Slack MCP server (built by Ivan Korotovsky) connects AI assistants like Claude, Cursor, and Windsurf directly to Slack workspaces, enabling conversational access to your team communication channels without requiring workspace admin approval for a bot install. Its standout feature is a "no permission" stealth mode — it authenticates using your own personal Slack session tokens (xoxc/xoxd, or a stored browser session) rather than requiring a Slack App with OAuth scopes, so it works even in locked-down workspaces where you cannot create bots. It also supports full OAuth Bot Token auth and Enterprise/GovSlack deployments for teams that prefer a conventional app install. Tools exposed include reading channel and DM/group-DM history with smart pagination, searching messages across the workspace, posting messages and thread replies, listing channels and users, and adding reactions. Common use cases include automating standups by posting summaries directly to team channels, searching past Slack conversations to surface decisions or context, monitoring specific channels for keywords or alerts, and drafting replies to thread discussions — all from natural-language prompts. Supports both Stdio and SSE transports plus proxy configuration for corporate networks. Install with: `npx slack-mcp-server@latest --transport stdio`. A separate official-style integration exists from Zencoder (@zencoderai/slack-mcp-server) for teams that prefer standard Bot Token OAuth over session-token auth. Compatible with Claude Desktop, Cursor, VS Code, Windsurf, and Cline.

The MCP server is free and open-source. Slack: Free tier with limited history. Pro: $8.75/user/mo. Business+: $12.50/user/mo. Enterprise Grid: Custom.

Search, Query and interact with data in your Milvus Vector Database.

Free and open-source MCP server. Milvus is open-source. Zilliz Cloud (managed): Free tier available, paid plans for production use.

Embeddings, vector search, document storage, and full-text search with the open-source AI application database.

Free and open-source MCP server. Chroma is open-source and free to self-host. Chroma Cloud currently in development.

OpenAI does not publish a dedicated, first-party "MCP server" for its own API — a `openai/mcp-server` repo does not exist. Instead, OpenAI's official open-source contribution to the MCP ecosystem is on the client side: openai/openai-agents-python (27,000+ stars), a lightweight framework for building multi-agent workflows with the OpenAI API that ships native support for connecting to MCP servers as a tool source, letting an OpenAI-model-powered agent call out to any MCP server (filesystem, GitHub, databases, etc.) the same way a Claude-based agent would. In other words, OpenAI's MCP investment is "consume MCP tools from an OpenAI agent," not "expose OpenAI itself as an MCP server." Teams that specifically want to call OpenAI's chat, embeddings, or image-generation endpoints as MCP tools from Claude, Cursor, or another MCP client instead rely on small community-built wrapper servers around the OpenAI SDK, authenticated with an `OPENAI_API_KEY`, exposing tools like generate_completion, generate_embedding, or generate_image. Typical use of the Agents SDK side: build a Python agent that uses GPT models for reasoning while pulling live context through an MCP filesystem or web-search server. Update this entry if OpenAI ships a genuine first-party MCP server for its own API in the future.

The MCP server is free and open-source. OpenAI API: Pay-per-token pricing. GPT-4o: ~$5/1M input tokens. GPT-3.5 Turbo: ~$0.50/1M input tokens. See official pricing.

Connect to Hugging Face Hub APIs - search spaces, papers, explore datasets and models.

The MCP server is free and open-source. Hugging Face: Free tier for public models. Pro: $9/mo. Enterprise Hub: Custom pricing. Inference API has free and paid tiers.

Open-source tool for collaborative editing, versioning, evaluating, and releasing prompts.

The MCP server is free and open-source. Langfuse Cloud: Free tier (50K observations/mo). Pro: from $59/mo. Enterprise: Custom. Self-hosted is free.

Twilio's official MCP server, built by the Twilio Alpha team and published as @twilio-alpha/mcp, exposes the entirety of Twilio's public API surface to AI assistants over the Model Context Protocol. Rather than hand-writing tool wrappers, the server auto-generates MCP tools directly from Twilio's OpenAPI specs, so it stays in sync with new Twilio products (Voice, Messaging/SMS, Verify, Lookup, Conversations, and more) as they ship. Because a full API surface can blow past an LLM's context window, the server supports --services and --tags flags to scope which Twilio products are loaded into a given session, keeping tool lists small and relevant. Authentication uses a Twilio Account SID paired with an API Key/Secret pair (created in the Twilio Console), passed as a single credential string at launch rather than long-lived account credentials. The monorepo also ships a companion openapi-mcp-server package that can turn any OpenAPI spec into an MCP server using the same generator, useful for teams building on top of Twilio's partner or vertical APIs. Twilio's security guidance explicitly recommends against running community MCP servers alongside the official one to reduce the risk of a compromised third-party tool touching production SMS, voice, or verification workflows tied to real phone numbers and customer data.

The MCP server is free and open-source. Twilio: Pay-as-you-go pricing. SMS from $0.0079/msg. Voice from $0.0085/min. Free trial credits available.