Metadata-Version: 2.4
Name: utcp
Version: 1.1.0
Summary: Universal Tool Calling Protocol (UTCP) client library for Python
Author: UTCP Contributors
License-Expression: MPL-2.0
Project-URL: Homepage, https://utcp.io
Project-URL: Source, https://github.com/universal-tool-calling-protocol/python-utcp
Project-URL: Issues, https://github.com/universal-tool-calling-protocol/python-utcp/issues
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: Python :: 3
Classifier: Operating System :: OS Independent
Requires-Python: >=3.10
Description-Content-Type: text/markdown
Requires-Dist: pydantic>=2.0
Requires-Dist: python-dotenv>=1.0
Requires-Dist: tomli>=2.0
Provides-Extra: dev
Requires-Dist: build; extra == "dev"
Requires-Dist: pytest; extra == "dev"
Requires-Dist: pytest-asyncio; extra == "dev"
Requires-Dist: pytest-cov; extra == "dev"
Requires-Dist: coverage; extra == "dev"
Requires-Dist: twine; extra == "dev"

# Universal Tool Calling Protocol (UTCP)

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## Introduction

The Universal Tool Calling Protocol (UTCP) is a secure, scalable standard for defining and interacting with tools across a wide variety of communication protocols. UTCP 1.0.0 introduces a modular core with a plugin-based architecture, making it more extensible, testable, and easier to package.

In contrast to other protocols, UTCP places a strong emphasis on:

*   **Scalability**: UTCP is designed to handle a large number of tools and providers without compromising performance.
*   **Extensibility**: A pluggable architecture allows developers to easily add new communication protocols, tool storage mechanisms, and search strategies without modifying the core library.
*   **Interoperability**: With a growing ecosystem of protocol plugins (including HTTP, SSE, CLI, and more), UTCP can integrate with almost any existing service or infrastructure.
*   **Ease of Use**: The protocol is built on simple, well-defined Pydantic models, making it easy for developers to implement and use.


![MCP vs. UTCP](https://github.com/user-attachments/assets/3cadfc19-8eea-4467-b606-66e580b89444)

## Repository Structure

This repository contains the complete UTCP Python implementation:

- **[`core/`](core/)** - Core `utcp` package with foundational components ([README](core/README.md))
- **[`plugins/communication_protocols/`](plugins/communication_protocols/)** - Protocol-specific plugins:
  - [`http/`](plugins/communication_protocols/http/) - HTTP/REST, SSE, streaming, OpenAPI ([README](plugins/communication_protocols/http/README.md))
  - [`cli/`](plugins/communication_protocols/cli/) - Command-line tools ([README](plugins/communication_protocols/cli/README.md))
  - [`mcp/`](plugins/communication_protocols/mcp/) - Model Context Protocol ([README](plugins/communication_protocols/mcp/README.md))
  - [`text/`](plugins/communication_protocols/text/) - File-based tools ([README](plugins/communication_protocols/text/README.md))
  - [`socket/`](plugins/communication_protocols/socket/) - TCP/UDP (🚧 In Progress)
  - [`gql/`](plugins/communication_protocols/gql/) - GraphQL (🚧 In Progress)

## Architecture Overview

UTCP uses a modular architecture with a core library and protocol plugins:

### Core Package (`utcp`)

The [`core/`](core/) directory contains the foundational components:
- **Data Models**: Pydantic models for `Tool`, `CallTemplate`, `UtcpManual`, and `Auth`
- **Client Interface**: Main `UtcpClient` for tool interaction
- **Plugin System**: Extensible interfaces for protocols, repositories, and search
- **Default Implementations**: Built-in tool storage and search strategies

## Quick Start

### Installation

Install the core library and any required protocol plugins:

```bash
# Install core + HTTP plugin (most common)
pip install utcp utcp-http

# Install additional plugins as needed
pip install utcp-cli utcp-mcp utcp-text
```

### Basic Usage

```python
from utcp.utcp_client import UtcpClient

# Create client with HTTP API
client = await UtcpClient.create(config={
    "manual_call_templates": [{
        "name": "my_api",
        "call_template_type": "http",
        "url": "https://api.example.com/utcp"
    }]
})

# Call a tool
result = await client.call_tool("my_api.get_data", {"id": "123"})
```

## Protocol Plugins

UTCP supports multiple communication protocols through dedicated plugins:

| Plugin | Description | Status | Documentation |
|--------|-------------|--------|---------------|
| [`utcp-http`](plugins/communication_protocols/http/) | HTTP/REST APIs, SSE, streaming | ✅ Stable | [HTTP Plugin README](plugins/communication_protocols/http/README.md) |
| [`utcp-cli`](plugins/communication_protocols/cli/) | Command-line tools | ✅ Stable | [CLI Plugin README](plugins/communication_protocols/cli/README.md) |
| [`utcp-mcp`](plugins/communication_protocols/mcp/) | Model Context Protocol | ✅ Stable | [MCP Plugin README](plugins/communication_protocols/mcp/README.md) |
| [`utcp-text`](plugins/communication_protocols/text/) | Local file-based tools | ✅ Stable | [Text Plugin README](plugins/communication_protocols/text/README.md) |
| [`utcp-websocket`](plugins/communication_protocols/websocket/) | WebSocket real-time bidirectional communication | ✅ Stable | [WebSocket Plugin README](plugins/communication_protocols/websocket/README.md) |
| [`utcp-socket`](plugins/communication_protocols/socket/) | TCP/UDP protocols | 🚧 In Progress | [Socket Plugin README](plugins/communication_protocols/socket/README.md) |
| [`utcp-gql`](plugins/communication_protocols/gql/) | GraphQL APIs | 🚧 In Progress | [GraphQL Plugin README](plugins/communication_protocols/gql/README.md) |

For development, you can install the packages in editable mode from the cloned repository:

```bash
# Clone the repository
git clone https://github.com/universal-tool-calling-protocol/python-utcp.git
cd python-utcp

# Install the core package in editable mode with dev dependencies
pip install -e "core[dev]"

# Install a specific protocol plugin in editable mode
pip install -e plugins/communication_protocols/http
```

## Migration Guide from 0.x to 1.0.0

Version 1.0.0 introduces several breaking changes. Follow these steps to migrate your project.

1.  **Update Dependencies**: Install the new `utcp` core package and the specific protocol plugins you use (e.g., `utcp-http`, `utcp-cli`).
2.  **Configuration**:
    *   **Configuration Object**: `UtcpClient` is initialized with a `UtcpClientConfig` object, dict or a path to a JSON file containing the configuration.
    *   **Manual Call Templates**: The `providers_file_path` option is removed. Instead of a file path, you now provide a list of `manual_call_templates` directly within the `UtcpClientConfig`.
    *   **Terminology**: The term `provider` has been replaced with `call_template`, and `provider_type` is now `call_template_type`.
    *   **Streamable HTTP**: The `call_template_type` `http_stream` has been renamed to `streamable_http`.
3.  **Update Imports**: Change your imports to reflect the new modular structure. For example, `from utcp.client.transport_interfaces.http_transport import HttpProvider` becomes `from utcp_http.http_call_template import HttpCallTemplate`.
4.  **Tool Search**: If you were using the default search, the new strategy is `TagAndDescriptionWordMatchStrategy`. This is the new default and requires no changes unless you were implementing a custom strategy.
5.  **Tool Naming**: Tool names are now namespaced as `manual_name.tool_name`. The client handles this automatically.
6.  **Variable Substitution Namespacing**: Variables that are substituted in different `call_templates`, are first namespaced with the name of the manual with the `_` duplicated. So a key in a tool call template called `API_KEY` from the manual `manual_1` would be converted to `manual__1_API_KEY`.

## Usage Examples

### 1. Using the UTCP Client

**`config.json`** (Optional)

You can define a comprehensive client configuration in a JSON file. All of these fields are optional.

```json
{
  "variables": {
    "openlibrary_URL": "https://openlibrary.org/static/openapi.json"
  },
  "load_variables_from": [
    {
      "variable_loader_type": "dotenv",
      "env_file_path": ".env"
    }
  ],
  "tool_repository": {
    "tool_repository_type": "in_memory"
  },
  "tool_search_strategy": {
    "tool_search_strategy_type": "tag_and_description_word_match"
  },
  "manual_call_templates": [
    {
        "name": "openlibrary",
        "call_template_type": "http",
        "http_method": "GET",
        "url": "${URL}",
        "content_type": "application/json"
    },
  ],
  "post_processing": [
    {
        "tool_post_processor_type": "filter_dict",
        "only_include_keys": ["name", "key"],
        "only_include_tools": ["openlibrary.read_search_authors_json_search_authors_json_get"]
    }
  ]
}
```

**`client.py`**

```python
import asyncio
from utcp.utcp_client import UtcpClient
from utcp.data.utcp_client_config import UtcpClientConfig

async def main():
    # The UtcpClient can be created with a config file path, a dict, or a UtcpClientConfig object.

    # Option 1: Initialize from a config file path
    # client_from_file = await UtcpClient.create(config="./config.json")

    # Option 2: Initialize from a dictionary
    client_from_dict = await UtcpClient.create(config={
        "variables": {
            "openlibrary_URL": "https://openlibrary.org/static/openapi.json"
        },
        "load_variables_from": [
            {
                "variable_loader_type": "dotenv",
                "env_file_path": ".env"
            }
        ],
        "tool_repository": {
            "tool_repository_type": "in_memory"
        },
        "tool_search_strategy": {
            "tool_search_strategy_type": "tag_and_description_word_match"
        },
        "manual_call_templates": [
            {
                "name": "openlibrary",
                "call_template_type": "http",
                "http_method": "GET",
                "url": "${URL}",
                "content_type": "application/json"
            }
        ],
        "post_processing": [
            {
                "tool_post_processor_type": "filter_dict",
                "only_include_keys": ["name", "key"],
                "only_include_tools": ["openlibrary.read_search_authors_json_search_authors_json_get"]
            }
        ]
    })

    # Option 3: Initialize with a full-featured UtcpClientConfig object
    from utcp_http.http_call_template import HttpCallTemplate
    from utcp.data.variable_loader import VariableLoaderSerializer
    from utcp.interfaces.tool_post_processor import ToolPostProcessorConfigSerializer

    config_obj = UtcpClientConfig(
        variables={"openlibrary_URL": "https://openlibrary.org/static/openapi.json"},
        load_variables_from=[
            VariableLoaderSerializer().validate_dict({
                "variable_loader_type": "dotenv", "env_file_path": ".env"
            })
        ],
        manual_call_templates=[
            HttpCallTemplate(
                name="openlibrary",
                call_template_type="http",
                http_method="GET",
                url="${URL}",
                content_type="application/json"
            )
        ],
        post_processing=[
            ToolPostProcessorConfigSerializer().validate_dict({
                "tool_post_processor_type": "filter_dict",
                "only_include_keys": ["name", "key"],
                "only_include_tools": ["openlibrary.read_search_authors_json_search_authors_json_get"]
            })
        ]
    )
    client = await UtcpClient.create(config=config_obj)

    # Call a tool. The name is namespaced: `manual_name.tool_name`
    result = await client.call_tool(
        tool_name="openlibrary.read_search_authors_json_search_authors_json_get",
        tool_args={"q": "J. K. Rowling"}
    )

    print(result)

if __name__ == "__main__":
    asyncio.run(main())
```

### 2. Providing a UTCP Manual

A `UTCPManual` describes the tools you offer. The key change is replacing `tool_provider` with `tool_call_template`.

**`server.py`**

UTCP decorator version:

```python
from fastapi import FastAPI
from utcp_http.http_call_template import HttpCallTemplate
from utcp.data.utcp_manual import UtcpManual
from utcp.python_specific_tooling.tool_decorator import utcp_tool

app = FastAPI()

# The discovery endpoint returns the tool manual
@app.get("/utcp")
def utcp_discovery():
    return UtcpManual.create_from_decorators(manual_version="1.0.0")

# The actual tool endpoint
@utcp_tool(tool_call_template=HttpCallTemplate(
    name="get_weather",
    url=f"https://example.com/api/weather",
    http_method="GET"
), tags=["weather"])
@app.get("/api/weather")
def get_weather(location: str):
    return {"temperature": 22.5, "conditions": "Sunny"}
```


No UTCP dependencies server version:

```python
from fastapi import FastAPI

app = FastAPI()

# The discovery endpoint returns the tool manual
@app.get("/utcp")
def utcp_discovery():
    return {
        "manual_version": "1.0.0",
        "utcp_version": "1.0.2",
        "tools": [
            {
                "name": "get_weather",
                "description": "Get current weather for a location",
                "tags": ["weather"],
                "inputs": {
                    "type": "object",
                    "properties": {
                        "location": {"type": "string"}
                    }
                },
                "outputs": {
                    "type": "object",
                    "properties": {
                        "temperature": {"type": "number"},
                        "conditions": {"type": "string"}
                    }
                },
                "tool_call_template": {
                    "call_template_type": "http",
                    "url": "https://example.com/api/weather",
                    "http_method": "GET"
                }
            }
        ]
    }

# The actual tool endpoint
@app.get("/api/weather")
def get_weather(location: str):
    return {"temperature": 22.5, "conditions": "Sunny"}
```

### 3. Full examples

You can find full examples in the [examples repository](https://github.com/universal-tool-calling-protocol/utcp-examples).

## Protocol Specification

### `UtcpManual` and `Tool` Models

The `tool_provider` object inside a `Tool` has been replaced by `tool_call_template`.

```json
{
  "manual_version": "string",
  "utcp_version": "string",
  "tools": [
    {
      "name": "string",
      "description": "string",
      "inputs": { ... },
      "outputs": { ... },
      "tags": ["string"],
      "tool_call_template": {
        "call_template_type": "http",
        "url": "https://...",
        "http_method": "GET"
      }
    }
  ]
}
```

## Call Template Configuration Examples

Configuration examples for each protocol. Remember to replace `provider_type` with `call_template_type`.

### HTTP Call Template

```json
{
  "name": "my_rest_api",
  "call_template_type": "http", // Required
  "url": "https://api.example.com/users/{user_id}", // Required
  "http_method": "POST", // Required, default: "GET"
  "content_type": "application/json", // Optional, default: "application/json"
  "allowed_communication_protocols": ["http"], // Optional, defaults to [call_template_type]. Restricts which protocols tools can use.
  "auth": { // Optional, authentication for the HTTP request (example using ApiKeyAuth for Bearer token)
    "auth_type": "api_key",
    "api_key": "Bearer $API_KEY", // Required
    "var_name": "Authorization", // Optional, default: "X-Api-Key"
    "location": "header" // Optional, default: "header"
  },
  "auth_tools": { // Optional, authentication for converted tools, if this call template points to an openapi spec that should be automatically converted to a utcp manual (applied only to endpoints requiring auth per OpenAPI spec)
    "auth_type": "api_key",
    "api_key": "Bearer $TOOL_API_KEY", // Required
    "var_name": "Authorization", // Optional, default: "X-Api-Key"
    "location": "header" // Optional, default: "header"
  },
  "headers": { // Optional
    "X-Custom-Header": "value"
  },
  "body_field": "body", // Optional, default: "body"
  "header_fields": ["user_id"] // Optional
}
```

### SSE (Server-Sent Events) Call Template

```json
{
  "name": "my_sse_stream",
  "call_template_type": "sse", // Required
  "url": "https://api.example.com/events", // Required
  "event_type": "message", // Optional
  "reconnect": true, // Optional, default: true
  "retry_timeout": 30000, // Optional, default: 30000 (ms)
  "auth": { // Optional, example using BasicAuth
    "auth_type": "basic",
    "username": "${USERNAME}", // Required
    "password": "${PASSWORD}" // Required
  },
  "headers": { // Optional
    "X-Client-ID": "12345"
  },
  "body_field": null, // Optional
  "header_fields": [] // Optional
}
```

### Streamable HTTP Call Template

Note the name change from `http_stream` to `streamable_http`.

```json
{
  "name": "streaming_data_source",
  "call_template_type": "streamable_http", // Required
  "url": "https://api.example.com/stream", // Required
  "http_method": "POST", // Optional, default: "GET"
  "content_type": "application/octet-stream", // Optional, default: "application/octet-stream"
  "chunk_size": 4096, // Optional, default: 4096
  "timeout": 60000, // Optional, default: 60000 (ms)
  "auth": null, // Optional
  "headers": {}, // Optional
  "body_field": "data", // Optional
  "header_fields": [] // Optional
}
```

### CLI Call Template

```json
{
  "name": "multi_step_cli_tool",
  "call_template_type": "cli", // Required
  "commands": [ // Required - sequential command execution
    {
      "command": "git clone UTCP_ARG_repo_url_UTCP_END temp_repo",
      "append_to_final_output": false
    },
    {
      "command": "cd temp_repo && find . -name '*.py' | wc -l"
      // Last command output returned by default
    }
  ],
  "env_vars": { // Optional
    "GIT_AUTHOR_NAME": "UTCP Bot",
    "API_KEY": "${MY_API_KEY}"
  },
  "working_dir": "/tmp", // Optional
  "auth": null // Optional (always null for CLI)
}
```

**CLI Protocol Features:**
- **Multi-command execution**: Commands run sequentially in single subprocess
- **Cross-platform**: PowerShell on Windows, Bash on Unix/Linux/macOS  
- **State preservation**: Directory changes (`cd`) persist between commands
- **Argument placeholders**: `UTCP_ARG_argname_UTCP_END` format
- **Output referencing**: Access previous outputs with `$CMD_0_OUTPUT`, `$CMD_1_OUTPUT`
- **Flexible output control**: Choose which command outputs to include in final result

### Text Call Template

```json
{
  "name": "my_text_manual",
  "call_template_type": "text", // Required
  "file_path": "./manuals/my_manual.json", // Required
  "auth": null, // Optional (always null for Text)
  "auth_tools": { // Optional, authentication for generated tools from OpenAPI specs
    "auth_type": "api_key",
    "api_key": "Bearer ${API_TOKEN}",
    "var_name": "Authorization",
    "location": "header"
  }
}
```

### MCP (Model Context Protocol) Call Template

```json
{
  "name": "my_mcp_server",
  "call_template_type": "mcp", // Required
  "config": { // Required
    "mcpServers": {
      "server_name": {
        "transport": "stdio",
        "command": ["python", "-m", "my_mcp_server"]
      }
    }
  },
  "auth": { // Optional, example using OAuth2
    "auth_type": "oauth2",
    "token_url": "https://auth.example.com/token", // Required
    "client_id": "${CLIENT_ID}", // Required
    "client_secret": "${CLIENT_SECRET}", // Required
    "scope": "read:tools" // Optional
  }
}
```

## Security: Protocol Restrictions

UTCP provides fine-grained control over which communication protocols each manual can use through the `allowed_communication_protocols` field. This prevents potentially dangerous protocol escalation (e.g., an HTTP-based manual accidentally calling CLI tools).

### Default Behavior (Secure by Default)

When `allowed_communication_protocols` is not set or is empty, a manual can only register and call tools that use the **same protocol type** as the manual itself:

```python
from utcp_http.http_call_template import HttpCallTemplate

# This manual can ONLY register/call HTTP tools (default restriction)
http_manual = HttpCallTemplate(
    name="my_api",
    call_template_type="http",
    url="https://api.example.com/utcp"
    # allowed_communication_protocols not set → defaults to ["http"]
)
```

### Allowing Multiple Protocols

To allow a manual to work with tools from multiple protocols, explicitly set `allowed_communication_protocols`:

```python
from utcp_http.http_call_template import HttpCallTemplate

# This manual can register/call both HTTP and CLI tools
multi_protocol_manual = HttpCallTemplate(
    name="flexible_manual",
    call_template_type="http",
    url="https://api.example.com/utcp",
    allowed_communication_protocols=["http", "cli"]  # Explicitly allow both
)
```

### JSON Configuration

```json
{
  "name": "my_api",
  "call_template_type": "http",
  "url": "https://api.example.com/utcp",
  "allowed_communication_protocols": ["http", "cli", "mcp"]
}
```

### Behavior Summary

| `allowed_communication_protocols` | Manual Type | Allowed Tool Protocols |
|----------------------------------|-------------|------------------------|
| Not set / `null` | `"http"` | Only `"http"` |
| `[]` (empty) | `"http"` | Only `"http"` |
| `["http", "cli"]` | `"http"` | `"http"` and `"cli"` |
| `["http", "cli", "mcp"]` | `"cli"` | `"http"`, `"cli"`, and `"mcp"` |

### Registration Filtering

During `register_manual()`, tools that don't match the allowed protocols are automatically filtered out with a warning:

```
WARNING - Tool 'dangerous_tool' uses communication protocol 'cli' which is not in 
allowed protocols ['http'] for manual 'my_api'. Tool will not be registered.
```

### Call-Time Validation

Even if a tool somehow exists in the repository, calling it will fail if its protocol is not allowed:

```python
# Raises ValueError: Tool 'my_api.some_cli_tool' uses communication protocol 'cli' 
# which is not allowed by manual 'my_api'. Allowed protocols: ['http']
await client.call_tool("my_api.some_cli_tool", {"arg": "value"})
```

## Testing

The testing structure has been updated to reflect the new core/plugin split.

### Running Tests

To run all tests for the core library and all plugins:
```bash
# Ensure you have installed all dev dependencies
python -m pytest
```

To run tests for a specific package (e.g., the core library):
```bash
python -m pytest core/tests/
```

To run tests for a specific plugin (e.g., HTTP):
```bash
python -m pytest plugins/communication_protocols/http/tests/ -v
```

To run tests with coverage:
```bash
python -m pytest --cov=utcp --cov-report=xml
```

## Build

The build process now involves building each package (`core` and `plugins`) separately if needed, though they are published to PyPI independently.

1.  Create and activate a virtual environment.
2.  Install build dependencies: `pip install build`.
3.  Navigate to the package directory (e.g., `cd core`).
4.  Run the build: `python -m build`.
5.  The distributable files (`.whl` and `.tar.gz`) will be in the `dist/` directory.

## OpenAPI Ingestion - Zero Infrastructure Tool Integration

🚀 **Transform any existing REST API into UTCP tools without server modifications!**

UTCP's OpenAPI ingestion feature automatically converts OpenAPI 2.0/3.0 specifications into UTCP tools, enabling AI agents to interact with existing APIs directly - no wrapper servers, no API changes, no additional infrastructure required.

### Quick Start with OpenAPI

```python
from utcp_http.openapi_converter import OpenApiConverter
import aiohttp

# Convert any OpenAPI spec to UTCP tools
async def convert_api():
    async with aiohttp.ClientSession() as session:
        async with session.get("https://api.github.com/openapi.json") as response:
            openapi_spec = await response.json()
    
    converter = OpenApiConverter(openapi_spec)
    manual = converter.convert()
    
    print(f"Generated {len(manual.tools)} tools from GitHub API!")
    return manual

# Or use UTCP Client configuration for automatic detection
from utcp.utcp_client import UtcpClient

client = await UtcpClient.create(config={
    "manual_call_templates": [{
        "name": "github",
        "call_template_type": "http", 
        "url": "https://api.github.com/openapi.json",
        "auth_tools": {  # Authentication for generated tools requiring auth
            "auth_type": "api_key",
            "api_key": "Bearer ${GITHUB_TOKEN}",
            "var_name": "Authorization",
            "location": "header"
        }
    }]
})
```

### Key Benefits

- ✅ **Zero Infrastructure**: No servers to deploy or maintain
- ✅ **Direct API Calls**: Native performance, no proxy overhead  
- ✅ **Automatic Conversion**: OpenAPI schemas → UTCP tools
- ✅ **Selective Authentication**: Only protected endpoints get auth, public endpoints remain accessible
- ✅ **Authentication Preserved**: API keys, OAuth2, Basic auth supported
- ✅ **Multi-format Support**: JSON, YAML, OpenAPI 2.0/3.0
- ✅ **Batch Processing**: Convert multiple APIs simultaneously

### Multiple Ingestion Methods

1. **Direct Converter**: `OpenApiConverter` class for full control
2. **Remote URLs**: Fetch and convert specs from any URL
3. **Client Configuration**: Include specs directly in UTCP config
4. **Batch Processing**: Process multiple specs programmatically
5. **File-based**: Convert local JSON/YAML specifications

📖 **[Complete OpenAPI Ingestion Guide](docs/openapi-ingestion.md)** - Detailed examples and advanced usage

---

## [Contributors](https://www.utcp.io/about)
