Best Riverside.fm MCP Server MCP Server Alternatives 2026

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.

There are three different Figma MCP servers and the install command on most listings belongs to the one Figma no longer leads with, so start with which you are choosing. **Figma's recommended server is now the hosted remote one at `https://mcp.figma.com/mcp`** — nothing to install, OAuth in the client, attached with `claude mcp add --transport http figma https://mcp.figma.com/mcp`. It is also the only one with the write and cross-file tools (`use_figma`, `generate_figma_design`, `generate_diagram`, `create_new_file`, `search_design_system`, asset upload and download). **The Dev Mode desktop server ships inside the Figma Desktop app** — enable it in Dev Mode (Shift+D) from the MCP server section of the inspect panel and the app opens a local endpoint at `http://127.0.0.1:3845/mcp`. Figma's docs now describe the desktop server as being for specific organisation and enterprise cases and recommend the remote one instead. Because it runs in the app, it reads whatever you have selected on the canvas: exact colors, typography, spacing, auto-layout constraints, component variants, and — the part a token-based reader cannot do — your Code Connect mappings, so it emits your component names rather than generic divs. It requires a Dev or Full seat on a paid plan and the desktop app must be open. The repository linked here is `figma/mcp-server-guide`, Figma's own setup guide; Figma does not publish the server's source. **The community alternative is Figma-Context-MCP by GLips** (15,500+ stars), installed as `npx figma-developer-mcp --figma-api-key=YOUR_FIGMA_ACCESS_TOKEN`. It authenticates with a Personal Access Token from Figma Settings → Personal Access Tokens and calls the REST API, so it needs no desktop app, works headlessly in CI, and can read any file your account can open — including from a free plan. It exposes the document JSON, node lookup by ID, component listing, text extraction, and rendered-image download. The practical split: pick the official server when design-to-code fidelity and Code Connect matter and you are already paying for Dev Mode; pick GLips when you need automation, a free plan, or a machine with no Figma app installed. Both let an assistant translate a frame into accurate React, Tailwind, or plain HTML/CSS instead of guessing from a screenshot.

The MCP server is free and open-source. Figma: Free tier (3 projects). Professional: $15/editor/mo. Organization: $45/editor/mo. Enterprise: $75/editor/mo.

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.

There is no official SendGrid MCP server, and that is the first thing worth knowing if you searched for one. Twilio owns SendGrid and does publish an official MCP server at twilio-labs/mcp, but that server is generated from Twilio's own Public API specs and covers none of SendGrid's v3 email endpoints — connecting it will not give an assistant a way to send an email or touch a contact list. Twilio's own developer blog acknowledges the gap by publishing a walkthrough on building a SendGrid MCP server yourself rather than shipping one. This entry therefore tracks the most established community implementation, Garoth/sendgrid-mcp (TypeScript, 29 stars), which wraps the SendGrid v3 Marketing API. Its tool surface is broader than most email servers: contact management (list_contacts, add_contact, delete_contacts, get_contacts_by_list), list management (list_contact_lists, create_contact_list, delete_list, add_contacts_to_list, remove_contacts_from_list), sending (send_email for one-off transactional mail with optional dynamic-template data, and send_to_list which creates a SendGrid Single Send against one or more list IDs), dynamic templates (create_template, list_templates, get_template, delete_template), plus get_stats, validate_email, list_verified_senders and list_suppression_groups. Those last two exist because SendGrid rejects sends from unverified senders and requires either a suppression_group_id or a custom_unsubscribe_url on a Single Send, so an agent has to look both up before it can complete a campaign. The README is explicit that only v3 APIs are supported — legacy templates will not work. Install is from source: git clone, npm install, then point your client at the built entrypoint with SENDGRID_API_KEY in the environment. Two cautions. The npm package named sendgrid-mcp is a different project (deyikong/sendgrid-mcp, 3 stars, which does offer a READ_ONLY mode) — do not assume npx installs the repo described here. And this server exposes delete_contacts, delete_list and delete_template, which are irreversible against a live marketing database; scope the API key narrowly rather than granting full access.

The MCP server is free and open-source. SendGrid (by Twilio): Free tier (100 emails/day). Essentials: $19.95/mo. Pro: $89.95/mo. Premier: Custom.

The Resend MCP Server is Resend's official Model Context Protocol integration, letting AI assistants send and receive transactional email, manage contacts, broadcasts, and domains directly from Claude, Cursor, or any MCP-compatible client. Resend offers two ways to connect: a fully hosted remote server at mcp.resend.com (Streamable HTTP, no local install, OAuth login on first connect) that works well for Claude web/desktop and Cursor, or the same open-source code run locally via `npx resend-mcp` (published to npm as `resend-mcp`) using stdio or HTTP transport for CI, headless agents, or self-hosted setups. Authentication is either OAuth (hosted mode, browser-based) or a Resend API key passed as a Bearer token — handy for servers where a browser login isn't possible. Setup is documented for Claude Code, Claude Desktop/web, Cursor, Windsurf, Codex, and GitHub Copilot in VS Code. Typical use: ask Claude to "send a welcome email to this new signup using our verified domain" or "list contacts added to the newsletter audience this week," and the MCP server routes the request through your existing Resend account — no custom SMTP or REST integration code required. With 546+ GitHub stars, it's one of the most widely adopted first-party MCP servers in the email/transactional-messaging category.

The MCP server is free and open-source. Resend: Free tier (3,000 emails/mo, 100/day). Pro: $20/mo. Enterprise: Custom pricing.

The YouTube MCP Server by Zubeid Hendricks connects AI assistants to the full YouTube Data API v3, letting Claude search videos, pull transcripts, manage content, and run analytics without leaving the conversation. It is one of the most complete community YouTube MCP servers, exposing tools across several areas: video management (search by keyword, retrieve metadata, get statistics, and list a channel's uploads), transcript retrieval (fetch full captions for any public video for summarization or Q&A), channel operations (look up channel details, subscriber and view counts, and recent activity), playlist tools (list and inspect playlist contents), Shorts creation workflows, and advanced analytics for creators tracking performance. Authentication uses a single YOUTUBE_API_KEY obtained free from the Google Cloud Console by enabling the YouTube Data API v3 — read-heavy operations fit comfortably inside the daily quota. Install globally with npm as zubeid-youtube-mcp-server, run it directly with npx (no install required), or add it through Smithery for one-click Claude Desktop setup; a Docker image is also provided for HTTP transport. The YouTube MCP Server is ideal for content research, competitive analysis, transcript-based summarization, and automated creator workflows — Claude can, for example, find the top videos on a topic, fetch their transcripts, and synthesize a briefing in a single pass.

The MCP server is free and open-source. YouTube Data API: Free quota (10,000 units/day). Additional quota available through Google Cloud billing.

Marcel Marais's Spotify MCP Server is a lightweight TypeScript bridge between AI assistants and the Spotify Web API, letting Claude control playback and search a listener's library through natural language. It exposes tools for searching tracks/albums/artists/playlists, controlling playback (play, pause, skip, queue management), reading and modifying the current queue, and browsing a user's playlists and saved library. Authentication uses standard Spotify OAuth (client ID/secret from the Spotify Developer Dashboard) with a one-time login flow to obtain a refresh token, after which the server runs locally via the MCP stdio transport. Typical use: ask Claude to "queue up some upbeat workout music" or "what's currently playing," and it calls the Spotify API directly rather than requiring the user to switch to the Spotify app.

The MCP server is free and open-source. Spotify Web API: Free to use with rate limits. Spotify Premium not required for API access.

Exposes Cloudinary's media upload, transformation, AI analysis, management, optimization and delivery.

The MCP server is free and open-source. Cloudinary: Free tier (25 credits/mo). Plus: $89/mo. Advanced: $224/mo. Enterprise: Custom.

The official ElevenLabs MCP server (elevenlabs/elevenlabs-mcp) connects AI assistants like Claude Desktop, Cursor, Windsurf, and OpenAI Agents directly to ElevenLabs' text-to-speech and audio-processing APIs. Once installed, an AI client can generate natural-sounding speech from text in dozens of voices and languages, clone a voice from a short audio sample, design and save new synthetic voices to a personal voice library, transcribe spoken audio with automatic speaker diarization, isolate vocals from background noise, and compose layered soundscapes (e.g. "a thunderstorm in a dense jungle with animals reacting") from a text prompt. It also exposes ElevenLabs' Conversational AI agent-creation tools, so a client can spin up a voice agent with a defined persona and have it answer questions in character. Install via PyPI/uv with `uvx elevenlabs-mcp` and an `ELEVENLABS_API_KEY` from the ElevenLabs dashboard — the free tier includes 10k credits/month, enough for testing. Optional environment variables (`ELEVENLABS_MCP_BASE_PATH`, `ELEVENLABS_MCP_OUTPUT_MODE`) control whether generated audio is saved to disk, returned as base64-encoded MCP resources for containerized/serverless environments, or both, and `ELEVENLABS_API_RESIDENCY` supports enterprise data-residency requirements. With 1,450+ GitHub stars, it is the most widely adopted way to give an AI coding assistant real audio-generation capabilities without hand-rolling API calls.

The MCP server is free and open-source. ElevenLabs: Free tier (10K characters/mo). Starter: $5/mo. Creator: $22/mo. Pro: $99/mo. Scale: $330/mo.

The Discord MCP Server (SaseQ/discord-mcp) is a Java-based Model Context Protocol integration built on JDA (Java Discord API) that turns a Discord bot into a set of tools AI assistants can call directly. It lets Claude, Cursor, and other MCP clients read and send channel messages, manage threads, create and moderate channels and categories, manage roles and permissions, look up server (guild) members, and pull message history — enabling AI-driven community moderation, automated announcements, and Discord-native workflows without hand-writing bot code. The recommended install is Docker: set DISCORD_TOKEN (from a bot registered in the Discord Developer Portal) and an optional DISCORD_GUILD_ID as environment variables, then run the saseq/discord-mcp:latest image with SPRING_PROFILES_ACTIVE=http, which exposes the MCP endpoint at http://localhost:8085/mcp for remote/HTTP-transport clients. A Docker Compose path and a stdio-transport mode are also documented for local, per-client setups like Claude Desktop. Because it wraps JDA (Spring Boot underneath), it handles Discord's gateway/rate-limit quirks for you rather than requiring a hand-rolled REST client. This is the most-starred dedicated Discord MCP implementation; other community servers like v-3/discordmcp and hanweg/mcp-discord cover similar ground with lighter Node/Python stacks if a non-JVM runtime is preferred.

The MCP server is free and open-source. Discord: Free to use. Discord Bot API is free. Nitro subscription optional for enhanced user features.