How to Use the USPS Developer Portal MCP in Google ADK

Q: How does the Google ADK handle rate calculations via the USPS Developer Portal?

Your agent calls calculatedomesticrate or calculateinternationalrate. The response is structured data that can be immediately queried and stored in BigQuery for longitudinal reporting.

Q: Can I use the Google ADK to track packages from the USPS Developer Portal?

Yes. You expose tracking functions like trackuspspackage. The agent ingests a tracking number and returns the full status, which you can then analyze alongside other operational data in Vertex AI.

Q: What kind of address verification does the USPS Developer Portal and Google ADK support?

The system uses verifyuspsaddress to validate and standardize US addresses. This process confirms street names, city/state pairings, and proper formatting necessary for reliable mailing.

Audit USPS mail, calculate rates, and manage logistics with the Google ADK.

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Connect USPS Developer Portal MCP to Google ADK

Create your Vinkius account to connect USPS Developer Portal to Google ADK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup USPS Developer Portal with Google ADK

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Calculate International Shipping Rates

Use `calculate_international_rate` to determine costs for shipments crossing borders. You input destination details and package weight, and the agent returns the current USPS rate. Because you're building enterprise agents on Google Cloud using the ADK, this output can be immediately streamed into BigQuery alongside other financial data for massive historical analysis.

Verify and Standardize Addresses

The `verify_usps_address` tool lets you audit any US address against USPS standards. It corrects formatting issues, confirming the exact components of a mailing destination. This process is critical for maintaining data integrity in your enterprise pipeline. The Google ADK handles this by running the validation and feeding the clean results directly into your long-context reasoning models.

Get Service Commitments

Need to know when a package will arrive? `get_delivery_commitments` fetches estimated delivery timelines. You pass it service types, and you get back the expected commitment date. With the ADK's ability to hold over 1 million tokens of context, your agent can correlate these commitments with complex business rules—for example, only flagging shipments that fail to meet a specific SLA threshold.

Setup guide

Set up USPS Developer Portal MCP in Google ADK

Prerequisites

Python 3.10+ installed
google-adk package (pip install google-adk)
Active Vinkius subscription with a valid endpoint token

1

Install Google ADK

Run pip install google-adk to install the Agent Development Kit. MCP support is included via the McpToolset class.
2

Connect via SSE transport

Use McpToolset.from_server() with SseServerParams pointing to your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Create an LlmAgent

Pass the returned mcp_tools list directly to LlmAgent(tools=mcp_tools). The ADK maps each MCP tool to a native Gemini function call — no manual schema definitions required.
4

Run with any Gemini model

The agent works with any Gemini model (gemini-2.0-flash, gemini-2.5-pro, etc.). Copy the full example on the right to get started with USPS Developer Portal tools in your ADK agent.

agent.py

from google.adk.agents import LlmAgent
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import SseServerParams

# Connect to the MCP via SSE
mcp_tools, exit_stack = await McpToolset.from_server(
    connection_params=SseServerParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    )
)

# Create your agent with auto-discovered tools
agent = LlmAgent(
    name="USPS Developer Portal_agent",
    model="gemini-2.0-flash",
    instruction="You have access to USPS Developer Portal tools via MCP.",
    tools=mcp_tools,
)

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by USPS Web Tools. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about USPS Developer Portal MCP in Google ADK

Your agent calls `calculate_domestic_rate` or `calculate_international_rate`. The response is structured data that can be immediately queried and stored in BigQuery for longitudinal reporting.

Yes. You expose tracking functions like `track_usps_package`. The agent ingests a tracking number and returns the full status, which you can then analyze alongside other operational data in Vertex AI.

The system uses `verify_usps_address` to validate and standardize US addresses. This process confirms street names, city/state pairings, and proper formatting necessary for reliable mailing.

The detailed tool definitions are available via the MCP Server schema. Since you're operating within a Google Cloud environment, all usage patterns and error codes integrate with Vertex AI monitoring.

The server operates on address components (ZIP code, city, state), tracking numbers, and dimensions. The agent processes this raw input to provide actionable rate calculations and delivery estimates.

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