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MCP ACP Server

A Model Context Protocol (MCP) server for managing Ambient Code Platform (ACP) sessions via the public-api gateway.

---

Table of Contents

• Quick Start
• Features
• Installation
• Configuration
• Usage
• Tool Reference
• Troubleshooting
• Architecture
• Security
• Development
• Roadmap
• Contributing
• Status

---

Quick Start

# Install
git clone https://github.com/ambient-code/mcp
pip install dist/mcp_acp-*.whl

# Configure
mkdir -p ~/.config/acp
cat > ~/.config/acp/clusters.yaml <<EOF
clusters:
  my-cluster:
    server: https://public-api-ambient.apps.your-cluster.example.com
    token: your-bearer-token-here
    default_project: my-workspace
default_cluster: my-cluster
EOF
chmod 600 ~/.config/acp/clusters.yaml

Then add to your MCP client (Claude Desktop, Claude Code, or uvx) and try:

List my ACP sessions

---

Features

Session Management

Tool	Description
acp_list_sessions	List/filter sessions by status, age, with sorting and limits
acp_get_session	Get detailed session information by ID
acp_create_session	Create sessions with custom prompts, repos, model selection, and timeout
acp_create_session_from_template	Create sessions from predefined templates (triage/bugfix/feature/exploration)
acp_delete_session	Delete sessions with dry-run preview
acp_restart_session	Restart a stopped session
acp_clone_session	Clone an existing session's configuration into a new session
acp_update_session	Update session metadata (display name, timeout)

Observability

Tool	Description
acp_get_session_logs	Retrieve container logs for a session
acp_get_session_transcript	Retrieve conversation history (JSON or Markdown)
acp_get_session_metrics	Get usage statistics (tokens, duration, tool calls)

Labels

Tool	Description
acp_label_resource	Add labels to a session for organizing and filtering
acp_unlabel_resource	Remove labels from a session by key
acp_list_sessions_by_label	List sessions matching label selectors
acp_bulk_label_resources	Add labels to multiple sessions (max 3)
acp_bulk_unlabel_resources	Remove labels from multiple sessions (max 3)

Bulk Operations

Tool	Description
acp_bulk_delete_sessions	Delete multiple sessions (max 3) with confirmation and dry-run
acp_bulk_stop_sessions	Stop multiple running sessions (max 3)
acp_bulk_restart_sessions	Restart multiple stopped sessions (max 3)
acp_bulk_delete_sessions_by_label	Delete sessions matching label selectors (max 3 matches)
acp_bulk_stop_sessions_by_label	Stop sessions matching label selectors (max 3 matches)
acp_bulk_restart_sessions_by_label	Restart sessions matching label selectors (max 3 matches)

Cluster Management

Tool	Description
acp_list_clusters	List configured cluster aliases
acp_whoami	Check current configuration and authentication status
acp_switch_cluster	Switch between configured clusters
acp_login	Authenticate to a cluster with a Bearer token

Safety Features:

• Dry-Run Mode — All mutating operations support dry_run for safe preview before executing
• Bulk Operation Limits — Maximum 3 items per bulk operation with confirmation requirement
• Label Validation — Labels must be 1-63 alphanumeric characters, dashes, dots, or underscores

---

Installation

From Wheel

pip install dist/mcp_acp-*.whl

From Source

git clone https://github.com/ambient-code/mcp
cd mcp
uv pip install -e ".[dev]"

Requirements:

• Python 3.10+
• Bearer token for the ACP public-api gateway
• Access to an ACP cluster

---

Configuration

Cluster Config

Create ~/.config/acp/clusters.yaml:

clusters:
  vteam-stage:
    server: https://public-api-ambient.apps.vteam-stage.example.com
    token: your-bearer-token-here
    description: "V-Team Staging Environment"
    default_project: my-workspace

  vteam-prod:
    server: https://public-api-ambient.apps.vteam-prod.example.com
    token: your-bearer-token-here
    description: "V-Team Production"
    default_project: my-workspace

default_cluster: vteam-stage

Then secure the file:

chmod 600 ~/.config/acp/clusters.yaml

Authentication

Add your Bearer token to each cluster entry under the token field, or set the ACP_TOKEN environment variable:

export ACP_TOKEN=your-bearer-token-here

Get your token from the ACP platform administrator or the gateway's authentication endpoint.

Claude Desktop

Edit your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Linux: ~/.config/claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "acp": {
      "command": "mcp-acp",
      "args": [],
      "env": {
        "ACP_CLUSTER_CONFIG": "${HOME}/.config/acp/clusters.yaml"
      }
    }
  }
}

After editing, completely quit and restart Claude Desktop (not just close the window).

Claude Code (CLI)

claude mcp add mcp-acp -t stdio mcp-acp

Using uvx

uvx provides zero-install execution — no global Python pollution, auto-caching, and fast startup.

# Install uv (if needed)
curl -LsSf https://astral.sh/uv/install.sh | sh

Claude Desktop config for uvx:

{
  "mcpServers": {
    "acp": {
      "command": "uvx",
      "args": ["mcp-acp"]
    }
  }
}

For a local wheel (before PyPI publish):

{
  "mcpServers": {
    "acp": {
      "command": "uvx",
      "args": ["--from", "/full/path/to/dist/mcp_acp-0.1.0-py3-none-any.whl", "mcp-acp"]
    }
  }
}

---

Usage

Examples

# List sessions
List my ACP sessions
Show running sessions in my-workspace
List sessions older than 7 days in my-workspace
List sessions sorted by creation date, limit 20

# Session details
Get details for ACP session session-name
Show AgenticSession session-name in my-workspace

# Create a session
Create a new ACP session with prompt "Run all unit tests and report results"

# Create from template
Create an ACP session from the bugfix template called "fix-auth-issue"

# Restart / clone
Restart ACP session my-stopped-session
Clone ACP session my-session as "my-session-v2"

# Update session metadata
Update ACP session my-session display name to "Production Test Runner"

# Observability
Show logs for ACP session my-session
Get transcript for ACP session my-session in markdown format
Show metrics for ACP session my-session

# Labels
Label ACP session my-session with env=staging and team=platform
Remove label env from ACP session my-session
List ACP sessions with label team=platform

# Delete with dry-run (safe!)
Delete test-session from my-workspace in dry-run mode

# Actually delete
Delete test-session from my-workspace

# Bulk operations (dry-run first)
Delete these sessions: session-1, session-2, session-3 from my-workspace (dry-run first)
Stop all sessions with label env=test
Restart sessions with label team=platform

# Cluster operations
Check my ACP authentication
List my ACP clusters
Switch to ACP cluster vteam-prod
Login to ACP cluster vteam-stage with token

Trigger Keywords

Include one of these keywords so your MCP client routes the request to ACP: ACP, ambient, AgenticSession, or use tool names directly (e.g., acp_list_sessions, acp_whoami). Without a keyword, generic phrases like "list sessions" may not trigger the server.

Quick Reference

Task	Command Pattern
Check auth	Use acp_whoami
List all	List ACP sessions in PROJECT
Filter status	List running sessions in PROJECT
Filter age	List sessions older than 7d in PROJECT
Get details	Get details for ACP session SESSION
Create	Create ACP session with prompt "..."
Create from template	Create ACP session from bugfix template
Restart	Restart ACP session SESSION
Clone	Clone ACP session SESSION as "new-name"
Update	Update ACP session SESSION timeout to 1800
View logs	Show logs for ACP session SESSION
View transcript	Get transcript for ACP session SESSION
View metrics	Show metrics for ACP session SESSION
Add labels	Label ACP session SESSION with env=test
Remove labels	Remove label env from ACP session SESSION
Filter by label	List ACP sessions with label team=platform
Delete (dry)	Delete SESSION in PROJECT (dry-run)
Delete (real)	Delete SESSION in PROJECT
Bulk delete	Delete session-1, session-2 in PROJECT
Bulk by label	Stop sessions with label env=test
List clusters	Use acp_list_clusters
Login	Login to ACP cluster CLUSTER

---

Tool Reference

For complete API specifications including input schemas, output formats, and behavior details, see API_REFERENCE.md.

Category	Tool	Description
Session	acp_list_sessions	List/filter sessions
	acp_get_session	Get session details
	acp_create_session	Create session with prompt
	acp_create_session_from_template	Create from template
	acp_delete_session	Delete with dry-run support
	acp_restart_session	Restart stopped session
	acp_clone_session	Clone session configuration
	acp_update_session	Update display name or timeout
Observability	acp_get_session_logs	Retrieve container logs
	acp_get_session_transcript	Get conversation history
	acp_get_session_metrics	Get usage statistics
Labels	acp_label_resource	Add labels to session
	acp_unlabel_resource	Remove labels by key
	acp_list_sessions_by_label	Filter sessions by labels
	acp_bulk_label_resources	Bulk add labels (max 3)
	acp_bulk_unlabel_resources	Bulk remove labels (max 3)
Bulk	acp_bulk_delete_sessions	Delete multiple sessions (max 3)
	acp_bulk_stop_sessions	Stop multiple sessions (max 3)
	acp_bulk_restart_sessions	Restart multiple sessions (max 3)
	acp_bulk_delete_sessions_by_label	Delete by label (max 3)
	acp_bulk_stop_sessions_by_label	Stop by label (max 3)
	acp_bulk_restart_sessions_by_label	Restart by label (max 3)
Cluster	acp_list_clusters	List configured clusters
	acp_whoami	Check authentication status
	acp_switch_cluster	Switch cluster context
	acp_login	Authenticate with Bearer token

---

Troubleshooting

"No authentication token available"

Your token is not configured. Either:

1. Add token: your-token-here to your cluster in ~/.config/acp/clusters.yaml
2. Set the ACP_TOKEN environment variable

"HTTP 401: Unauthorized"

Your token is expired or invalid. Get a new token from the ACP platform administrator.

"HTTP 403: Forbidden"

You don't have permission for this operation. Contact your ACP platform administrator.

"Direct Kubernetes API URLs (port 6443) are not supported"

You're using a direct K8s API URL. Use the public-api gateway URL instead:

• Wrong: https://api.cluster.example.com:6443
• Correct: https://public-api-ambient.apps.cluster.example.com

"mcp-acp: command not found"

Add Python user bin to PATH:

• macOS: export PATH="$HOME/Library/Python/3.*/bin:$PATH"
• Linux: export PATH="$HOME/.local/bin:$PATH"

Then restart your shell.

MCP Tools Not Showing in Claude

1. Check Claude Desktop logs: Help → View Logs
2. Verify config file syntax is valid JSON
3. Make sure mcp-acp is in PATH
4. Restart Claude Desktop completely (quit, not just close)

"Permission denied" on clusters.yaml

chmod 600 ~/.config/acp/clusters.yaml
chmod 700 ~/.config/acp

---

Architecture

• MCP SDK — Standard MCP protocol implementation (stdio transport)
• httpx — Async HTTP REST client for the public-api gateway
• Pydantic — Settings management and input validation
• Three-layer design — Server (tool dispatch) → Client (HTTP + validation) → Formatters (output)

See CLAUDE.md for complete system design.

---

Security

• Input Validation — DNS-1123 format validation for all resource names
• Gateway URL Enforcement — Direct K8s API URLs (port 6443) rejected
• Bearer Token Security — Tokens filtered from logs, sourced from config or environment
• Resource Limits — Bulk operations limited to 3 items with confirmation

See SECURITY.md for complete security documentation including threat model and best practices.

---

Development

# One-time setup
uv venv && uv pip install -e ".[dev]"

# Pre-commit workflow
uv run ruff format . && uv run ruff check . && uv run pytest tests/

# Run with coverage
uv run pytest tests/ --cov=src/mcp_acp --cov-report=html

# Build wheel
uvx --from build pyproject-build --installer uv

See CLAUDE.md for contributing guidelines.

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Roadmap

Current implementation provides 26 tools. 3 tools remain planned:

• Session export (issue #28)
• Workflow management (issue #29)

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Contributing

1. Fork the repository
2. Create a feature branch
3. Add tests for new functionality
4. Ensure all tests pass (uv run pytest tests/)
5. Ensure code quality checks pass (uv run ruff format . && uv run ruff check .)
6. Submit a pull request

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Status

Code: Production-Ready | Tests: All Passing | Security: Input validation, gateway enforcement, token security | Tools: 26 implemented (3 more planned)

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Documentation

• API_REFERENCE.md — Full API specifications for all 26 tools
• SECURITY.md — Security features, threat model, and best practices
• CLAUDE.md — System architecture and development guide

License

MIT License — See LICENSE file for details.

Support

For issues and feature requests, use the GitHub issue tracker.