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MCP Server Framework and Tool Development library for building custom capabilities into agents.
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Eric Gustin 3424ec8219
MCP Local (#563) 
Versions:
* arcade-mcp\==1.0.0rc1
* arcade-mcp-server\==1.0.0rc1
* arcade-core\==2.5.0rc1
* arcade-tdk\==2.6.0rc1
* arcade-serve\==2.2.0rc1

### Summary
Adds first-class MCP support across Arcade, introduces a new MCP server
and CLI, unifies the project under the arcade-mcp name, overhauls
templates/scaffolding, and improves developer tooling, secrets
management, and examples.

### Highlights
- **MCP Server & Core**
- New MCP server with stdio and HTTP/SSE transports, session management,
resumability, and lifecycle handling.
- FastAPI-like `MCPApp` for building servers with lazy init; integrated
worker+MCP HTTP app option.
- Middleware system (logging and error handling), robust exception
hierarchy, and Pydantic-based settings.
- Async-safe managers for tools, resources, and prompts backed by
registries and locks.
- Developer-facing, transport-agnostic runtime context interfaces (logs,
tools, prompts, resources, sampling, UI, notifications).
- Conversion from Arcade ToolDefinition to MCP tool schema; OpenAI JSON
tool schema converter.
  - Parser supports `@app.tool`/`@app.tool(...)` decorators.

- **CLI**
  - New `mcp` command to run MCP servers with stdio or HTTP/SSE.
- New `secret` command to set/list/unset tool secrets (supports .env
input, preserves original casing for lookups).
- `new` command refactored; option to create a full toolkit package with
scaffolding.
  - `chat` command removed.
- `serve.py` imports updated to `arcade_serve.fastapi.telemetry`;
version retrieval now uses `arcade-mcp`.
  - `show.py` refactor to use new local catalog utilities.
- `display_tool_details` improved: adds “Default” column and handles
nested properties.

- **Configuration & Discovery**
- New `configure.py` to set up Claude Desktop, Cursor, and VS Code to
connect to local or Arcade Cloud MCP servers.
- Discovery utilities to find/install toolkits, build `ToolCatalog`s,
analyze files for tools, load kits from directories (pyproject parsing),
and build minimal toolkits.
- Better handling of provider API key resolution and evaluation suite
loading.

- **Templates & Scaffolding**
- Reorganized template structure (minimal vs full); moved
`.pre-commit-config.yaml`, `.ruff.toml`, license, Makefile, README,
tests, and tools layout to correct paths.
  - Minimal template adds `.env.example` for runtime secret injection.
- Template pyproject updated for MCP servers; includes sample server
with greeting and secret-reveal tools.
  - Authorization flow in templates simplified.

- **Repo-wide Renaming & Examples**
- Migrates references from `arcade-ai` to `arcade-mcp` across READMEs,
scripts, and package metadata.
- Examples updated (LangChain/LangGraph/AI SDK/TypeScript) and package
name changed to `arcade-mcp-sdk`.

- **Evals & Core Utilities**
- Evals now use OpenAI tooling format (`OpenAIToolList`, `to_openai`);
`tool_eval` takes `provider_api_key`.
- Core utilities: fixed `does_function_return_value` by dedenting before
parse; version bump to `2.5.0rc1` and dependency cleanup.

- **Tooling & CI**
- `setup-uv-env` action splits toolkit vs contrib dependency
installation.
- Pre-commit: excludes `libs/arcade-mcp-server/mkdocs.yml` and
`libs/tests/` from YAML and Ruff hooks; Ruff per-file ignores (e.g.,
C901 in `libs/**/*.py`, TRY400 in server docs paths).
- Makefile updates for uv env setup, quality checks, tests, builds, and
new `shell` target.
  - Added Makefile to MCP server library to streamline dev workflow.

- **Cleanup**
  - Removed `claude.json` config.
- Simplified stdio entrypoint; removed unused imports (`arcade_gmail`,
`arcade_search`).

### Breaking Changes
- **CLI**: `chat` command removed; use `mcp`, `secret`, and updated
`new`.
- **Naming**: All users should update references from `arcade-ai` to
`arcade-mcp`.
- **Templates**: File paths moved; downstream scripts referencing old
template locations may need updates.

### Getting Started
- Run an MCP server:
  - `arcade mcp --stdio --toolkits your_toolkit`
  - `arcade mcp --http --toolkits your_toolkit`
- Manage secrets:
  - `arcade secret set your_toolkit KEY=value`
  - `arcade secret list your_toolkit`
  - `arcade secret unset your_toolkit KEY`
- Configure clients:
- `arcade configure` to set up Claude Desktop, Cursor, and VS Code for
local/Arcade Cloud MCP.

---------

Co-authored-by: Sam Partee <sam@arcade-ai.com>
Co-authored-by: Shub <125150494+shubcodes@users.noreply.github.com>
2025-09-25 15:28:15 -07:00
.github MCP Local (#563) 2025-09-25 15:28:15 -07:00
.vscode 🏗️ Restructure: Multi-Package Architecture + uv Migration (#412) 2025-06-11 16:48:17 -07:00
contrib MCP Local (#563) 2025-09-25 15:28:15 -07:00
docker MCP Local (#563) 2025-09-25 15:28:15 -07:00
examples MCP Local (#563) 2025-09-25 15:28:15 -07:00
libs MCP Local (#563) 2025-09-25 15:28:15 -07:00
schemas/preview Tool Metadata (#357) 2025-04-16 19:17:36 -08:00
toolkits MCP Local (#563) 2025-09-25 15:28:15 -07:00
.editorconfig Fix ruff (#64) 2024-09-25 09:47:30 -07:00
.gitignore Remove toml (#210) 2025-01-17 09:56:43 -08:00
.pre-commit-config.yaml MCP Local (#563) 2025-09-25 15:28:15 -07:00
.prettierignore Fix ruff (#64) 2024-09-25 09:47:30 -07:00
.prettierrc.toml Fix ruff (#64) 2024-09-25 09:47:30 -07:00
.ruff.toml MCP Local (#563) 2025-09-25 15:28:15 -07:00
CONTRIBUTING.md MCP Local (#563) 2025-09-25 15:28:15 -07:00
cspell.config.yaml Replace arcade.client with arcadepy (#119) 2024-10-23 15:29:02 -07:00
LICENSE Update README and LICENSE (#220) 2025-01-23 19:43:48 -08:00
Makefile MCP Local (#563) 2025-09-25 15:28:15 -07:00
pyproject.toml MCP Local (#563) 2025-09-25 15:28:15 -07:00
README.md MCP Local (#563) 2025-09-25 15:28:15 -07:00
uv_setup.sh MCP Local (#563) 2025-09-25 15:28:15 -07:00
worker.toml Worker Deploy (#278) 2025-03-13 09:02:36 -07:00

README.md

Documentation • Tools • Quickstart • Contact Us

Arcade AI Platform

Arcade is a developer platform that lets you build, deploy, and manage tools for AI agents.

This repository contains the core Arcade libraries, organized as separate packages for maximum flexibility and modularity:

  • arcade-core - Core platform functionality and schemas | Source code | pip install arcade-core |
  • arcade-mcp-server - MCP Server Development Framework | Source code | pip install arcade-mcp-server |
  • arcade-tdk - Tool Development Kit with the @tool decorator | Source code | pip install arcade-tdk |
  • arcade-serve - Serving infrastructure for workers and MCP servers | Source code | pip install arcade-serve |
  • arcade-evals - Evaluation framework for testing tool performance | Source code | pip install 'arcade-mcp[evals] |
  • arcade-cli - Command-line interface for the Arcade platform | Source code | pip install arcade-mcp |

diagram

To learn more about Arcade.dev, check out our documentation.

Pst. hey, you, give us a star if you like it!

GitHub stars

Quick Start

Installation

For development, install all packages with dependencies using uv workspace:

# Install all packages and dev dependencies
uv sync --extra all --dev

# Or use the Makefile (includes pre-commit hooks)
make install

For production use, install individual packages as needed:

pip install arcade-mcp          # CLI
pip install 'arcade-mcp[evals]' # CLI + Evaluation framework
pip install 'arcade-mcp[all]'   # CLI + Serving infra + eval framework + TDK
pip install arcade_serve       # Serving infrastructure
pip install arcade-tdk         # Tool Development Kit

Development

Use the Makefile for standard tasks:

# Run tests
make test

# Run linting and type checking
make check

# Build all packages
make build

# See all available commands
make help

Client Libraries

Support and Community