Metadata-Version: 2.1
Name: mech-client
Version: 0.20.1
Summary: Basic client to interact with a mech
License: Apache-2.0
Author: David Minarsch
Author-email: david.minarsch@googlemail.com
Requires-Python: >=3.10,<3.15
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: 3.13
Classifier: Programming Language :: Python :: 3.14
Requires-Dist: aea-helpers (==0.21.15)
Requires-Dist: asn1crypto (>=1.4.0,<1.5.0)
Requires-Dist: click (==8.1.8)
Requires-Dist: gql (>=3.4.1)
Requires-Dist: jsonschema (>=4.20.0,<4.24.0)
Requires-Dist: olas-operate-middleware (==0.15.2)
Requires-Dist: pydantic (>=2.12.0)
Requires-Dist: safe-eth-py (>=7.18.0,<8.0.0)
Requires-Dist: setuptools (>=77.0.3,<78.0.0)
Requires-Dist: tabulate (>=0.9.0,<0.10.0)
Requires-Dist: websocket-client (>=0.32.0,<1)
Description-Content-Type: text/markdown

# Mech Client

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A client to interact with Mechs - AI agents providing services - on the [Olas Marketplace](https://olas.network/mech-marketplace). It allows users to post requests for AI tasks on-chain, and get their result delivered.

## Requirements

- Python >=3.10, <3.12 (Python 3.10 or 3.11)

## Developing, running and deploying Mechs and Mech tools

The easiest way to create, run, deploy and test your own Mech and Mech tools is to follow the Mech and Mech tool docs [here](https://stack.olas.network/mech-tools-dev/). The [Mech tools dev repo](https://github.com/valory-xyz/mech-tools-dev) used in those docs greatly simplifies the development flow and dev experience.

Only continue reading this README if you know what you are doing and you are specifically interested in this repo.

## Quickstart Guide
For a fast and straightforward setup, follow the instructions provided on the website [here](https://build.olas.network/hire). 
This guide will walk you through the essential steps to get up and running without requiring an in-depth understanding of the system.

## Installation

Find the latest available release on [PyPi](https://pypi.org/project/mech-client/).

We recommend that you create a virtual Python environment using [Poetry](https://python-poetry.org/). Set up your virtual environment as follows:

```bash
poetry new my_project
cd my_project
poetry add mech-client
```

Alternatively, you can also install the Mech Client in your local Python installation:

```bash
pip install mech-client
```

If you require to use the Mech Client programmatically, please see [this section](#programmatic-usage) below.

## CLI Usage

Display the available options:

```bash
mechx --help
```

```bash
Usage: mechx [OPTIONS] COMMAND [ARGS]...

  Command-line tool for interacting with AI Mechs on-chain.

  Mech Client enables you to send AI task requests to on-chain AI agents
  (mechs) via the Olas (Mech) Marketplace. Supports multiple payment methods,
  tool discovery, and both agent mode (Safe multisig) and client mode (EOA).

Options:
  --version      Show the version and exit.
  --client-mode  Enables client mode (EOA-based). Default is agent mode (Safe-
                 based).
  --help         Show this message and exit.

Commands:
  deposit       Manage prepaid balance deposits.
  ipfs          IPFS utility operations.
  mech          Manage and query AI mechs on the marketplace.
  request       Send an AI task request to a mech on-chain.
  setup         Setup agent mode for on-chain interactions via Safe...
  subscription  Manage Nevermined (NVM) subscriptions.
  tool          Manage and query mech tools.

```

## Mech Marketplace

Learn more about mech marketplace [here](https://olas.network/mech-marketplace)

### Supported Chains

**Supported chains:** `gnosis`, `base`, `polygon`, `optimism`

All commands require `--chain-config` with one of these four chain names.

| Chain | Marketplace | Agent Mode | Native Payment | NVM Subscriptions | OLAS Payments | USDC Payments |
|-------|-------------|------------|----------------|-------------------|---------------|---------------|
| Gnosis | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ |
| Base | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| Polygon | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
| Optimism | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |

**Notes:**
- **Marketplace**: Chains with marketplace contracts deployed. All supported chains have marketplace support.
- **Agent Mode**: All supported chains support on-chain agent registration via `setup`.
- **Native Payment**: Chains that support `deposit native` command for prepaid native token deposits.
- **NVM Subscriptions**: Chains that support `subscription purchase` command for Nevermined subscription-based payments (Gnosis, Base only).
- **OLAS/USDC Payments**: Chains that support `deposit token` command with OLAS or USDC tokens.
- **Subgraph**: Default subgraph URLs are provided for all supported chains. The `MECHX_SUBGRAPH_URL` environment variable is optional and only needed to override defaults.

### Set up agent mode for on-chain interactions

There are two modes you can use the mechx for on-chain interactions. Currently `agent-mode` is supported for all marketplace chains (Gnosis, Base, Polygon, and Optimism).

-   _agent mode_ (Recommended): This allows to register your on-chain interactions as agent on the olas protocol and allows for A2A activity to be reflected on the client
-   _client mode_: Simple on-chain interations using EOA

```bash
cp .example.env .env
```

📝 For better reliability, it is recommended to use a stable third-party RPC provider.

```bash
mechx setup --chain-config <chain_config>
```

⚠️ Note: Run `setup` for each chain you interact with, and ensure your `.env` file has the correct RPC endpoint.

### Generate Mech requests

#### List marketplace mechs

To list the top marketplace mechs based on deliveries, use the `mech list` command. You can specify the chain you want to query. Please note that only the first 20 mechs sorted by number of deliveries will be shown.

**Note:** Default subgraph URLs are provided for all supported chains. You can optionally override the default by setting:

```bash
export MECHX_SUBGRAPH_URL=<your-custom-subgraph-url>
```

Supported marketplace chains: gnosis, base, polygon, optimism

```bash
mechx mech list --chain-config gnosis
```

You can also find available Mechs [here](https://marketplace.olas.network/)

#### Usage

The basic usage of the Mech Client is as follows.

```bash
mechx request --prompts <prompt> --priority-mech <priority mech address> --tools openai-gpt-3.5-turbo --chain-config <chain_config>
```

The Mech Client can also be used to send batch requests. There are couple of different ways to achieve this:

```bash
mechx request --prompts={<prompt-1>,<prompt-2>} --priority-mech <priority mech address> --tools={<tool-1>,<tool-2>} --chain-config <chain_config>
```

or <br>

```bash
mechx request --prompts <prompt-1> --prompts <prompt-2> --priority-mech <priority mech address> --tools <tool-1> --tools <tool-2> --chain-config <chain_config>
```

Additionally other options are available and their usage is listed below:

`--use-prepaid <bool>`: use the prepaid method to send requests to a Mech via the Mech Marketplace. Defaults to False. <br>
`--use-offchain <bool>`: use the off-chain method to send requests to a Mech via the Mech Marketplace. Defaults to False.

#### Understanding Payment Types

**Important:** The payment type is determined by the mech's smart contract, not by the user. When you send a request, the client automatically detects the mech's payment type and handles the appropriate payment flow.

There are **5 payment types** supported:

| Payment Type | Description | Payment Method |
|--------------|-------------|----------------|
| **NATIVE** | Per-request native token payment | Sends native tokens (xDAI, ETH, MATIC) with transaction |
| **OLAS_TOKEN** | Per-request OLAS token payment | Approves & transfers OLAS tokens |
| **USDC_TOKEN** | Per-request USDC token payment | Approves & transfers USDC tokens |
| **NATIVE_NVM** | NVM subscription with native token | Validates subscription NFT (no per-request payment) |
| **TOKEN_NVM_USDC** | NVM subscription with USDC token | Validates subscription NFT (no per-request payment) |

**How it works:**

1. **Request command detects mech's payment type** - The client queries the mech's contract to determine how it accepts payment
2. **Client handles payment automatically** - Based on the payment type, the client either:
   - Sends native tokens with the transaction (NATIVE)
   - Approves and transfers ERC20 tokens (OLAS_TOKEN, USDC_TOKEN)
   - Validates your subscription NFT (NATIVE_NVM, TOKEN_NVM_USDC)
3. **You can use prepaid balance** - With `--use-prepaid` flag, the marketplace deducts from your prepaid balance instead of per-request payment (works for non-subscription mechs)

**Payment flow examples:**

```bash
# NATIVE payment mech (detected automatically)
mechx request --prompts "test" --tools openai-gpt-4 --chain-config gnosis
# → Sends xDAI with transaction

# OLAS_TOKEN payment mech (detected automatically)
mechx request --prompts "test" --tools openai-gpt-4 --chain-config gnosis
# → Approves OLAS → Sends request

# Using prepaid balance (any non-subscription mech)
mechx request --prompts "test" --tools openai-gpt-4 --use-prepaid --chain-config gnosis
# → Deducts from prepaid balance

# NVM subscription mech (detected automatically)
# First purchase subscription:
mechx subscription purchase --chain-config gnosis
# Then make unlimited requests:
mechx request --prompts "test" --tools openai-gpt-4 --chain-config gnosis
# → Validates subscription NFT
```

##### Prepaid Requests

You can deposit funds to your prepaid balance on the marketplace, then use `--use-prepaid` flag to pay from this balance instead of per-request payments. This works for non-subscription mechs only.

**Deposit native tokens (for NATIVE payment mechs):**

```bash
mechx deposit native <amount> --chain-config <chain_config>
```

**Deposit ERC20 tokens (for OLAS_TOKEN or USDC_TOKEN payment mechs):**

```bash
# Deposit OLAS tokens (amount in wei, 18 decimals)
mechx deposit token <amount> --chain-config <chain_config> --token-type olas

# Deposit USDC tokens (amount in smallest unit, 6 decimals)
mechx deposit token <amount> --chain-config <chain_config> --token-type usdc
```

**Note:** The `--token-type` parameter is required and must be explicitly specified.

**NVM Subscriptions (for NATIVE_NVM or TOKEN_NVM_USDC payment mechs):**

For mechs using NVM subscriptions, purchase a subscription upfront to enable unlimited requests during the subscription period:

```bash
mechx subscription purchase --chain-config <chain_config>
```

After purchasing, you can make requests without per-request payments. The marketplace validates your subscription NFT automatically.

⚠️ To ensure optimal performance and reliability when using `subscription purchase`, it is advisable to use a custom RPC provider as public RPC endpoints may be rate-limited or unreliable under high usage. You can configure your custom RPC URL in your environment variables using

```bash
export MECHX_CHAIN_RPC=
```

##### Offchain Requests

The offchain URL is automatically discovered from the mech's on-chain metadata. No additional configuration is required — simply use the `--use-offchain` flag:

```bash
mechx request --prompts "test" --tools openai-gpt-4 --use-offchain true --chain-config gnosis
```

The client queries the mech's `ComplementaryServiceMetadata` contract to find the `url` field published by the mech operator, then sends requests to that endpoint.

### List tools available for a mech

To list the tools available for a specific marketplace mech, use the `tool list` command. You can specify an AI Agent ID to get tools for a specific mech.

```bash
mechx tool list 1722 --chain-config gnosis
```

```bash
You will see an output like this:
+---------------------------------------------+-----------------------------------------------+
| Tool Name                                   | Unique Identifier                             |
+=============================================+===============================================+
| claude-prediction-offline                   | 1722-claude-prediction-offline                |
+---------------------------------------------+-----------------------------------------------+
| claude-prediction-online                    | 1722-claude-prediction-online                 |
+---------------------------------------------+-----------------------------------------------+
| deepmind-optimization                       | 1722-deepmind-optimization                    |
+---------------------------------------------+-----------------------------------------------+
```

### Get Tool Description

To get the description of a specific tool, use the ` tool describe` command. You need to specify the unique identifier of the tool.

```bash
mechx  tool describe <unique_identifier> --chain-config <chain_config>
```

Example usage:

```bash
mechx  tool describe 1722-openai-gpt-4 --chain-config gnosis
```

You will see an output like this:

```bash
Description for tool 1722-openai-gpt-4: Performs a request to OpenAI's GPT-4 model.
```

### Get Tool Input/Output Schema

To get the input/output schema of a specific tool, use the `tool schema` command. You need to specify the unique identifier of the tool.

```bash
mechx tool schema <unique_identifier> --chain-config <chain_config>
```

Example usage:

```bash
mechx tool schema 1722-openai-gpt-4 --chain-config gnosis
```

You will see an output like this:

```bash
Tool Details:
Tool Details:
+------------------------+---------------------------------------------+
| Tool Name              | Tool Description                            |
+========================+=============================================+
| OpenAI Request (GPT-4) | Performs a request to OpenAI's GPT-4 model. |
+------------------------+---------------------------------------------+
Input Schema:
+-------------+-----------------------------------------------+
| Field       | Value                                         |
+=============+===============================================+
| type        | text                                          |
+-------------+-----------------------------------------------+
| description | The request to relay to OpenAI's GPT-4 model. |
+-------------+-----------------------------------------------+
Output Schema:
+-----------+---------+-----------------------------------+
| Field     | Type    | Description                       |
+===========+=========+===================================+
| requestId | integer | Unique identifier for the request |
+-----------+---------+-----------------------------------+
| result    | string  | Response from OpenAI              |
+-----------+---------+-----------------------------------+
| prompt    | string  | User prompt to send to OpenAI     |
+-----------+---------+-----------------------------------+
```

### Set up the EOA and private key

To use the Mech Client using client mode, you need an EOA account and its associated private key stored in a text file `ethereum_private_key.txt`. You can set it up in two ways:

-   Use any software of your choice (e.g., [Metamask](https://metamask.io/)) and copy the private key:

    ```bash
    echo -n YOUR_PRIVATE_KEY > ethereum_private_key.txt
    ```

    Do not include any leading or trailing spaces, tabs or newlines, or any other character in the file `ethereum_private_key.txt`.

-   Alternatively, use the Open AEA command `generate-key` (you'll need to install [Open AEA](https://pypi.org/project/open-aea/) and its [Ethereum ledger plugin](https://pypi.org/project/open-aea-ledger-ethereum/)):

    ```bash
    aea generate-key ethereum
    ```

    and display the corresponding EOA:

    ```bash
    python -c "from web3 import Web3; print(Web3().eth.account.from_key(open('ethereum_private_key.txt').read()).address)"
    ```

The EOA you use must have enough funds to pay for the Mech requests, or alternatively, use a Nevermined subscription.

> **:warning: Warning** <br />
>
> -   **If the generated EOA account is for development purposes, make sure it does not contain large amounts of funds.**
>
> -   **If you store the key file in a local Git repository, we recommend that you add it to `.gitignore` in order to avoid publishing it unintentionally:**
>
>     ```bash
>     echo ethereum_private_key.txt >> .gitignore
>     ```

To use client-mode for cli commands, simply supply `--client-mode` flag before the cli commands.

```bash
mechx --client-mode <rest of the cli command>
```


> **:pencil2: Note** <br /> > **If you encounter an "Out of gas" error when executing the Mech Client, you will need to increase the gas limit, e.g.,**
>
> ```bash
> export MECHX_GAS_LIMIT=200000
> ```

### Chain configuration

Default configurations for different chains are stored in the file [configs/mechs.json](./mech_client/configs/mechs.json). If `--chain-config` parameter is not specified, the Mech Client will choose the first configuration on the JSON.

Additionally, you can override any configuration parameter by exporting any of the following environment variables:

```bash
MECHX_CHAIN_RPC
MECHX_SUBGRAPH_URL
MECHX_GAS_LIMIT
MECHX_TRANSACTION_URL

MECHX_LEDGER_CHAIN_ID
MECHX_LEDGER_POA_CHAIN
MECHX_LEDGER_DEFAULT_GAS_PRICE_STRATEGY
MECHX_LEDGER_IS_GAS_ESTIMATION_ENABLED
```

## Programmatic usage

You can also use the Mech Client as a library on your Python project.

1. Set up the private key as specified [above](#set-up-the-private-key). Store the resulting key file (e.g., `ethereum_private_key.txt`) in a convenient and secure location.

2. Create Python script `my_script.py`:

    ```bash
    touch my_script.py
    ```

3. Edit `my_script.py` as follows:

    ```python
    from mech_client.services import MarketplaceService
    from mech_client.domain.payment import PaymentType
    from mech_client.infrastructure.config import get_mech_config
    from aea_ledger_ethereum import EthereumApi, EthereumCrypto

    # Configuration
    PRIORITY_MECH_ADDRESS = "0x77af31De935740567Cf4fF1986D04B2c964A786a"
    PROMPT_TEXT = "Will Gnosis pay reach 100k cards in 2024?"
    TOOL_NAME = "openai-gpt-4o-2024-05-13"
    CHAIN_CONFIG = "gnosis"
    MODE = "client"  # Use "agent" for agent mode (Safe multisig)
    SAFE_ADDRESS = ""  # Required if MODE is "agent"

    # Setup ledger and crypto
    config = get_mech_config(CHAIN_CONFIG)
    crypto = EthereumCrypto("ethereum_private_key.txt")
    ledger_api = EthereumApi(**config.ledger_config.__dict__)

    # Create service
    service = MarketplaceService(
        chain_config=CHAIN_CONFIG,
        ledger_api=ledger_api,
        payer_address=crypto.address,
        mode=MODE,
        safe_address=SAFE_ADDRESS if MODE == "agent" else None,
    )

    # Send request
    result = service.send_request(
        priority_mech=PRIORITY_MECH_ADDRESS,
        tools=[TOOL_NAME],
        prompts=[PROMPT_TEXT],
        payment_type=PaymentType.NATIVE,  # or PaymentType.TOKEN, PaymentType.NATIVE_NVM
    )

    print(f"Transaction hash: {result['tx_hash']}")
    print(f"Request ID: {result['request_ids'][0]}")
    print(f"Result: {result.get('result')}")
    ```

    **Note:** See [docs/ARCHITECTURE.md](./docs/ARCHITECTURE.md) for architecture details and more examples.

You can also use the Mech Client to programmatically fetch tools for marketplace mechs in your Python project, as well as retrieve descriptions and input/output schemas for specific tools given their unique identifier.

1. Set up the private key as specified [above](#set-up-the-private-key). Store the resulting key file (e.g., `ethereum_private_key.txt`) in a convenient and secure location.

2. Create a Python script `fetch_tools_script.py`:

    ```bash
    touch fetch_tools_script.py
    ```

3. Edit `fetch_tools_script.py` as follows:

    ```python
    from mech_client.services import ToolService
    from mech_client.infrastructure.config import get_mech_config
    from aea_ledger_ethereum import EthereumApi

    # Configuration
    service_id = 1722  # Specify the service ID
    chain_config = "gnosis"  # Specify the chain configuration

    # Setup ledger API
    config = get_mech_config(chain_config)
    ledger_api = EthereumApi(**config.ledger_config.__dict__)

    # Create tool service
    tool_service = ToolService(
        chain_config=chain_config,
        ledger_api=ledger_api,
    )

    # Fetch tools for a specific marketplace mech
    tools = tool_service.list_tools(service_id=service_id)
    print(f"Tools for marketplace mech {service_id}:")
    for tool_name, tool_id in tools:
        print(f"  {tool_name}: {tool_id}")

    # Get description for a specific tool
    tool_name = "openai-gpt-4o-2024-05-13"  # Example tool name
    unique_identifier = f"{service_id}-{tool_name}"  # Format: serviceId-toolName

    description = tool_service.get_description(unique_identifier)
    print(f"\nDescription for {unique_identifier}:")
    print(f"  {description}")

    # Get input/output schema for a specific tool
    tools_info = tool_service.get_tools_info(service_id)
    input_schema = tool_service.format_input_schema(tools_info["input"])
    output_schema = tool_service.format_output_schema(tools_info["output"])

    print(f"\nInput schema: {input_schema}")
    print(f"Output schema: {output_schema}")
    ```

    **Note:** This example demonstrates the service-based API introduced in v0.17.0.

## Architecture & Documentation

### Architecture Overview

Version 0.17.0 introduced a comprehensive architectural refactoring that separates concerns into distinct layers:

```
┌──────────────────────────────────────┐
│         CLI Layer                    │  User interface & command routing
├──────────────────────────────────────┤
│         Service Layer                │  Business workflow orchestration
├──────────────────────────────────────┤
│         Domain Layer                 │  Core business logic & strategies
├──────────────────────────────────────┤
│      Infrastructure Layer            │  External system adapters
└──────────────────────────────────────┘
```

**Key improvements:**
- ✅ **Separation of concerns**: Each layer has a specific responsibility
- ✅ **Strategy pattern**: Flexible payment, execution, and delivery strategies
- ✅ **Dependency injection**: Better testability and modularity
- ✅ **Type safety**: Comprehensive type hints throughout
- ✅ **Comprehensive tests**: 288 unit tests with ~50% coverage

### Documentation

For detailed information about the architecture and development:

- **[docs/ARCHITECTURE.md](./docs/ARCHITECTURE.md)** - Comprehensive architecture guide
  - Layer descriptions and responsibilities
  - Data flow diagrams
  - Key patterns (Factory, Strategy, Repository)
  - Component reference
  - Best practices

- **[docs/TESTING.md](./docs/TESTING.md)** - Testing guide for contributors
  - Test structure and organization
  - Running tests and coverage reports
  - Writing tests (patterns, fixtures, mocking)
  - Testing async components
  - Best practices

- **[CLAUDE.md](./CLAUDE.md)** - Development guidelines for Claude Code
  - Command dependency diagrams
  - Common issues and solutions
  - Environment variables reference
  - Development commands

### For Library Users

If you use mech-client as a library (not just the CLI), see:
- [Programmatic usage](#programmatic-usage) - Basic usage examples
- [docs/ARCHITECTURE.md](./docs/ARCHITECTURE.md) - Understanding the architecture

### For Contributors

If you want to contribute to mech-client development:
1. Read [docs/ARCHITECTURE.md](./docs/ARCHITECTURE.md) to understand the structure
2. Follow [docs/TESTING.md](./docs/TESTING.md) for writing tests
3. Review [CLAUDE.md](./CLAUDE.md) for development guidelines
4. See [Developer installation](#developer-installation) below

## Developer installation

To setup the development environment for this project, clone the repository and run the following commands:

```bash
poetry install
poetry shell
```

## Release guide

- Bump versions in `pyproject.toml`.`mech_client/__init__.py` and `SECURITY.md`
- `poetry lock`
- `rm -rf dist`
- `autonomy packages sync --update-packages`
- `make dist`
- Then, create a release PR and tag the release.

## FAQ

<details>

<summary><b>On which chains are AI Mechs deployed?</b></summary>

The [Mech repository](https://github.com/valory-xyz/mech?tab=readme-ov-file#examples-of-deployed-mechs) contains the latest information on deployed Mechs.

</details>

<details>

<summary><b>Are AI Mechs deployed on testnets?</b></summary>

No. AI Mechs are currently deployed only on mainnets.

</details>

<details>

<summary><b>Where can I find the agent blueprint ID?</b></summary>

You can find the agent blueprint IDs for each chain on the [Marketplace](https://marketplace.olas.network) or on the [Mech repository](https://github.com/valory-xyz/mech?tab=readme-ov-file#examples-of-deployed-mechs).

</details>

<details>

<summary><b>How do I access an AI Mech on a different chain?</b></summary>

Use the `--chain-config <name>` parameter together with a valid `--priority-mech` address, for example:

```bash
mechx request --prompts "write a short poem" --priority-mech 0x77af31De935740567Cf4fF1986D04B2c964A786a --key ./ethereum_private_key.txt --tools openai-gpt-4o-2024-05-13 --chain-config gnosis
```

</details>

