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‎examples/a2a/.dockerignore‎

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# Ignore Python cache
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__pycache__/
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*.pyc
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# Ignore Git files
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.git/
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.gitignore
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# Ignore local env files
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.env
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*.env
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# Ignore IDE/editor folders
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.vscode/
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.idea/
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# Ignore Docker related leftovers
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docker-compose.override.yml
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# Ignore OpenAPI in Docker build context if needed
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!hr_agent/openapi.yaml

‎examples/a2a/.env.example‎

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# Google Cloud
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GOOGLE_API_KEY=
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# HR (Staff0)
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HR_AUTH0_DOMAIN=
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HR_AGENT_AUTH0_AUDIENCE=https://staff0/agent
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HR_API_AUTH0_AUDIENCE=https://staff0/
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HR_AGENT_BASE_URL=http://localhost:8080
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HR_API_BASE_URL=http://hr-api:8081
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# HR AGENT to HR API client (auth method: CIBA)
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HR_AGENT_AUTH0_CLIENT_ID=
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HR_AGENT_AUTH0_CLIENT_SECRET=
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# BANK AGENT to HR AGENT client (auth method: Client Credentials)
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BANK_AGENT_AUTH0_CLIENT_ID=
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BANK_AGENT_AUTH0_CLIENT_ASSERTION_SIGNING_KEY_PATH=./certs/bank_agent_private_key.pem
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# Bank
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BANK_AGENT_BASE_URL=http://bank-agent:5000
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BANK_AGENT_BENEFICIARY_COMPANIES=STAFF0
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# Optional
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HR_AGENT_PORT=8080
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HR_API_PORT=8081
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BANK_AGENT_PORT=5000
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FLASK_ENV=development

‎examples/a2a/LICENSE‎

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Apache License
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‎examples/a2a/Makefile‎

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# ====================
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# Load environment variables from .env
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# ====================
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include .env
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export $(shell sed 's/=.*//' .env)
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# ====================
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# Config Variables
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# ====================
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ENV_FILE=.env
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# ====================
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# HR Agent Variables
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# ====================
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HR_AGENT_IMAGE_NAME=hr-agent
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HR_AGENT_DOCKERFILE=hr_agent/Dockerfile
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# ====================
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# HR API Variables
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# ====================
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HR_API_IMAGE_NAME=hr-api
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HR_API_DOCKERFILE=hr_api/Dockerfile
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# ====================
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# Local Docker HR Agent
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# ====================
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build-hr-agent:
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docker build -t $(HR_AGENT_IMAGE_NAME) -f $(HR_AGENT_DOCKERFILE) .
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run-hr-agent:
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docker run --env-file $(ENV_FILE) -p $(HR_AGENT_PORT):$(HR_AGENT_PORT) $(HR_AGENT_IMAGE_NAME)
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rebuild-run-hr-agent: build-hr-agent run-hr-agent
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# ====================
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# Local Docker HR API
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# ====================
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build-hr-api:
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docker build -t $(HR_API_IMAGE_NAME) -f $(HR_API_DOCKERFILE) .
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run-hr-api:
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docker run --env-file $(ENV_FILE) -p $(HR_API_PORT):$(HR_API_PORT) $(HR_API_IMAGE_NAME)
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rebuild-run-hr-api: build-hr-api run-hr-api
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# ====================
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# Local All
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# ====================
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run:
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@{ \
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docker-compose up --build & \
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poetry run adk web & \
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wait; \
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}

‎examples/a2a/README.md‎

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# Auth0 + Google A2A & ADK sample
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## Getting Started
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### Prerequisites
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1. Get a [Gemini API key](https://ai.google.dev/gemini-api/docs/api-key).
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2. Configure your Auth0 tenant with the following:
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- APIs
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- HR API
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- Audience: `https://staff0/`
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- Permissions: `read:employee`
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- HR Agent
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- Audience: `https://staff0/agent`
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- Applications
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- Bank Agent
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- Grant Types: `Client Credentials`
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- Credentials: `Private Key JWT`
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- APIs: `HR Agent`
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- HR Agent
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- Grant Types: `Client Credentials`, `Client Initiated Backchannel Authentication (CIBA)`
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- APIs: `Auth0 Management API` (enabled permissions: `read:users`), `HR API` (enabled permissions: `read:employee`)
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- Push Notifications using [Auth0 Guardian](https://auth0.com/docs/secure/multi-factor-authentication/auth0-guardian) must be `enabled`.
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- A test user enrolled in Guardian MFA.
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3. Install [Poetry](https://python-poetry.org/)
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```shell
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pipx install poetry
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```
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4. Install [Google ADK](https://google.github.io/adk-docs/)
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```shell
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pipx install google-adk
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```
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5. Install [Docker](https://docs.docker.com/engine/install/)
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### Setup
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Copy the `.env.example` file to `.env` and fill in the required variables.
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### How to run it
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1. **Install Dependencies**
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```shell
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poetry install
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```
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2. **Run HR Agent, HR API and Bank Agent**
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```shell
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make run
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```
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3. **Open the Bank Agent Chatbot by navigating to [http://localhost:8000/dev-ui?app=bank_agent](http://localhost:8000/dev-ui?app=bank_agent)**
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## How it works
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```mermaid
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sequenceDiagram
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participant User as User
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participant BankAgent as Bank Agent
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participant Auth0 as Auth0 (staff0.auth0.com)
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participant Staff0_HR_Agent as Staff0 HR Agent
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participant Staff0_HR_API as Staff0 HR API
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User->>BankAgent: I want to open an account
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BankAgent->>User: Please provide your employment details
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User->>BankAgent: I work at Staff0
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BankAgent->>User: You may be eligible for extra benefits, let me verify your employment...
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BankAgent->>Staff0_HR_Agent: Get A2A Agent Card
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Staff0_HR_Agent-->>BankAgent: Agent Card
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BankAgent->>Auth0: Request access token (client credentials)
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Auth0-->>BankAgent: Access Token
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BankAgent->>Staff0_HR_Agent: Verify employment details (Access Token)
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Staff0_HR_Agent->>Auth0: Request access token (CIBA)
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Auth0->>User: Push notification to approve access
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User-->>Auth0: Approves access
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Auth0-->>Staff0_HR_Agent: Access Token
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Staff0_HR_Agent->>Staff0_HR_API: Retrieve employment details (Access Token)
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Staff0_HR_API-->>Staff0_HR_Agent: Employment details
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Staff0_HR_Agent-->>BankAgent: Verification result
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BankAgent->>User: You are eligible for extra benefits
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```
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---
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<p align="center">
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<picture>
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<source media="(prefers-color-scheme: light)" srcset="https://cdn.auth0.com/website/sdks/logos/auth0_light_mode.png" width="150">
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<source media="(prefers-color-scheme: dark)" srcset="https://cdn.auth0.com/website/sdks/logos/auth0_dark_mode.png" width="150">
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<img alt="Auth0 Logo" src="https://cdn.auth0.com/website/sdks/logos/auth0_light_mode.png" width="150">
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</picture>
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</p>
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<p align="center">Auth0 is an easy to implement, adaptable authentication and authorization platform. To learn more checkout <a href="https://auth0.com/why-auth0">Why Auth0?</a></p>
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<p align="center">
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This project is licensed under the Apache 2.0 license. See the <a href="/LICENSE"> LICENSE</a> file for more info.</p>

‎examples/a2a/adk.toml‎

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[project]
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pyproject_path = "./pyproject.toml"

‎examples/a2a/bank_agent/__init__.py‎

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from .agent import root_agent
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__all__ = ["root_agent"]

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