Contextstream Mcp Server

ContextStream MCP Server

Give your AI coding assistant brilliant memory, deep context, and superpowers it never had.

Documentation • Pricing

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npx --prefer-online -y @contextstream/mcp-server@latest setup

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Get Started (VS Code + Copilot)

Option 1: Rust MCP (recommended)

curl -fsSL https://contextstream.io/scripts/mcp.sh | bash

irm https://contextstream.io/scripts/mcp.ps1 | iex

Then run:

contextstream-mcp setup

Option 2: Node MCP

npx --prefer-online -y @contextstream/mcp-server@latest setup

After setup, restart VS Code/Copilot.

Works with: Claude Code • Cursor • VS Code • Claude Desktop • Codex CLI • OpenCode • Antigravity

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This Isn't Just Memory. This Is Intelligence.

Other tools give your AI a notepad. ContextStream gives it a brain.

Your AI doesn't just remember things—it understands your entire codebase, learns from every conversation, pulls knowledge from your team's GitHub, Slack, and Notion, and delivers exactly the right context at exactly the right moment.

One setup. Instant transformation.

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What Changes When You Install This

| Before | After | |--------|-------| | AI searches files one-by-one, burning tokens | Semantic search finds code by meaning in milliseconds | | Context lost when conversations get long | Smart compression preserves what matters before compaction | | Team knowledge scattered across tools | Unified intelligence from GitHub, Slack, Notion—automatically | | Same mistakes repeated across sessions | Lessons system ensures your AI learns from every failure | | Generic responses, no project awareness | Deep context about your architecture, decisions, patterns |

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The Power Under the Hood

Semantic Code Intelligence

Ask "where do we handle authentication?" and get the answer instantly. No grep chains. No reading 10 files. Your AI understands your code at a conceptual level.

SmartRouter Context Delivery

Every message is analyzed. Risky refactor? Relevant lessons surface automatically. Making a decision? Your AI knows to capture it. The right context, every time, without you asking.

Team Knowledge Fusion

Connect GitHub, Slack, and Notion. Discussions from months ago? Surfaced when relevant. That architecture decision buried in a PR comment? Your AI knows about it.

Code Graph Analysis

"What depends on UserService?" "What's the impact of changing this function?" Your AI sees the connections across your entire codebase.

Context Pressure Awareness

Long conversation? ContextStream tracks token usage, auto-saves critical state, and ensures nothing important is lost when context compacts.

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The Tools Your AI Gets

init            → Loads your workspace context instantly
context         → Delivers relevant context every single message
search          → Semantic, hybrid, keyword—find anything by meaning
session         → Captures decisions, preferences, lessons automatically
memory          → Builds a knowledge graph of your project
graph           → Maps dependencies and analyzes impact
project         → Indexes your codebase for semantic understanding
media           → Index and search video, audio, images (great for Remotion)
integration     → Queries GitHub, Slack, Notion directly

Your AI uses these automatically. You just code.

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Global Fallback Workspace (Unmapped Folders)

ContextStream now supports a catch-all mode for random folders (for example ~ or ad-hoc dirs) that are not associated with a project/workspace yet.

• init(...) resolves normal folder mappings first (.contextstream/config.json, parent/global mappings).
• If no mapping exists, it uses a single hidden global fallback workspace (.contextstream-global) in workspace-only mode.
• Context/memory/session tools continue to work without hard setup errors.
• Project-bound actions (for example project(action="ingest_local")) return guided remediation to create/select a project instead of failing with a raw project_id required error.
• As soon as you enter a mapped project folder, that real workspace/project is prioritized and replaces fallback scope.

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Manual Configuration

> Skip this if you ran the setup wizard.

Claude Code

claude mcp add contextstream -- npx --prefer-online -y @contextstream/mcp-server@latest
claude mcp update contextstream -e CONTEXTSTREAM_API_URL=https://api.contextstream.io -e CONTEXTSTREAM_API_KEY=your_key

Cursor / Claude Desktop

{
  "mcpServers": {
    "contextstream": {
      "command": "npx",
      "args": ["--prefer-online", "-y", "@contextstream/mcp-server@latest"],
      "env": {
        "CONTEXTSTREAM_API_URL": "https://api.contextstream.io",
        "CONTEXTSTREAM_API_KEY": "your_key"
      }
    }
  }
}

Locations: ~/.cursor/mcp.json • ~/Library/Application Support/Claude/claude_desktop_config.json

OpenCode

Local server:

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "contextstream": {
      "type": "local",
      "command": ["npx", "-y", "contextstream-mcp"],
      "environment": {
        "CONTEXTSTREAM_API_KEY": "{env:CONTEXTSTREAM_API_KEY}"
      },
      "enabled": true
    }
  }
}

Remote server:

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "contextstream": {
      "type": "remote",
      "url": "https://mcp.contextstream.com",
      "enabled": true
    }
  }
}

For the local variant, export CONTEXTSTREAM_API_KEY before launching OpenCode.

Locations: ./opencode.json • ~/.config/opencode/opencode.json

VS Code

For GitHub Copilot in VS Code, the easiest path is the hosted remote MCP with built-in OAuth. Marketplace installs should write this remote server definition automatically.

Hosted remote MCP (recommended)

{
  "servers": {
    "contextstream": {
      "type": "http",
      "url": "https://mcp.contextstream.io/mcp?default_context_mode=fast"
    }
  }
}

On first use, VS Code should prompt you to authorize ContextStream in the browser and then complete setup without an API key in the config file.

npx @contextstream/mcp-server@latest setup now defaults VS Code/Copilot to this hosted remote when you are using the production ContextStream cloud. To force a local runtime instead, run setup with CONTEXTSTREAM_VSCODE_MCP_MODE=local.

For self-hosted or non-default API deployments, local runtime remains the default:

Rust MCP (recommended)

{
  "servers": {
    "contextstream": {
      "type": "stdio",
      "command": "contextstream-mcp",
      "args": [],
      "env": {
        "CONTEXTSTREAM_API_URL": "https://api.contextstream.io",
        "CONTEXTSTREAM_API_KEY": "your_key",
        "CONTEXTSTREAM_TOOLSET": "complete",
        "CONTEXTSTREAM_TRANSCRIPTS_ENABLED": "true",
        "CONTEXTSTREAM_HOOK_TRANSCRIPTS_ENABLED": "true",
        "CONTEXTSTREAM_SEARCH_LIMIT": "15",
        "CONTEXTSTREAM_SEARCH_MAX_CHARS": "2400"
      }
    }
  }
}

Node MCP server

{
  "servers": {
    "contextstream": {
      "type": "stdio",
      "command": "npx",
      "args": ["--prefer-online", "-y", "@contextstream/mcp-server@latest"],
      "env": {
        "CONTEXTSTREAM_API_URL": "https://api.contextstream.io",
        "CONTEXTSTREAM_API_KEY": "your_key",
        "CONTEXTSTREAM_TOOLSET": "complete",
        "CONTEXTSTREAM_TRANSCRIPTS_ENABLED": "true",
        "CONTEXTSTREAM_HOOK_TRANSCRIPTS_ENABLED": "true",
        "CONTEXTSTREAM_SEARCH_LIMIT": "15",
        "CONTEXTSTREAM_SEARCH_MAX_CHARS": "2400"
      }
    }
  }
}

GitHub Copilot CLI

Use the Copilot CLI to interactively add the MCP server:

/mcp add

Or add to ~/.copilot/mcp-config.json (pick one runtime):

Rust MCP (recommended)

{
  "mcpServers": {
    "contextstream": {
      "command": "contextstream-mcp",
      "args": [],
      "env": {
        "CONTEXTSTREAM_API_URL": "https://api.contextstream.io",
        "CONTEXTSTREAM_API_KEY": "your_key",
        "CONTEXTSTREAM_TOOLSET": "complete",
        "CONTEXTSTREAM_TRANSCRIPTS_ENABLED": "true",
        "CONTEXTSTREAM_HOOK_TRANSCRIPTS_ENABLED": "true",
        "CONTEXTSTREAM_SEARCH_LIMIT": "15",
        "CONTEXTSTREAM_SEARCH_MAX_CHARS": "2400"
      }
    }
  }
}

Node MCP server

{
  "mcpServers": {
    "contextstream": {
      "command": "npx",
      "args": ["--prefer-online", "-y", "@contextstream/mcp-server@latest"],
      "env": {
        "CONTEXTSTREAM_API_URL": "https://api.contextstream.io",
        "CONTEXTSTREAM_API_KEY": "your_key",
        "CONTEXTSTREAM_TOOLSET": "complete",
        "CONTEXTSTREAM_TRANSCRIPTS_ENABLED": "true",
        "CONTEXTSTREAM_HOOK_TRANSCRIPTS_ENABLED": "true",
        "CONTEXTSTREAM_SEARCH_LIMIT": "15",
        "CONTEXTSTREAM_SEARCH_MAX_CHARS": "2400"
      }
    }
  }
}

For more information, see the GitHub Copilot CLI documentation.

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VS Code + Copilot Tips

• Run setup once and keep both config files:
• ~/.copilot/mcp-config.json
• .vscode/mcp.json
• Rust install: use contextstream-mcp as the command.
• Node install: use npx --prefer-online -y @contextstream/mcp-server@latest as the command.
• Force local VS Code/Copilot setup with CONTEXTSTREAM_VSCODE_MCP_MODE=local.
• Force hosted remote VS Code/Copilot setup with CONTEXTSTREAM_VSCODE_MCP_MODE=remote.
• Use mcpServers in Copilot CLI config and servers in VS Code config.

Quick Troubleshooting

• Remove duplicate ContextStream entries across Workspace/User config scopes.
• Check CONTEXTSTREAM_API_URL and CONTEXTSTREAM_API_KEY are set.
• Remove stale version pins like @contextstream/mcp-server@0.3.xx.
• Restart VS Code/Copilot after config changes.

Known Limitations

HTTP transport OAuth and vscode.dev dependency

The hosted HTTP MCP transport (https://mcp.contextstream.io/mcp) uses OAuth authentication that routes through vscode.dev for the redirect flow. This can fail in environments where vscode.dev is blocked (corporate networks, regional restrictions, CDN-level blocks).

Workaround: Use the stdio transport (Rust binary or Node.js) with API key authentication instead:

{
  "contextstream": {
    "type": "stdio",
    "command": "npx",
    "args": ["-y", "@contextstream/mcp-server@latest"],
    "env": {
      "CONTEXTSTREAM_API_KEY": "your-api-key"
    }
  }
}

SDK version compatibility

@modelcontextprotocol/sdk versions 1.28.0 and above introduce breaking changes. The package.json pins the SDK to `>=1.25.1 Stop teaching your AI the same things over and over. ContextStream makes it brilliant from the first message.

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: contextstream
• Source: contextstream/mcp-server
• License: MIT

Install and usage instructions live in the source repository linked above.