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Connect Usps Developer Portal to ChatGPT, Claude and Gemini

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Run your entire postal logistics workflow through your AI agent.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 8 capabilities

We ship only the actions that matter.

Capability set01 / 02

01-04

4 capabilities in this set.

Part of 8 available through USPS Web Tools.

  1. 01

    Calculate domestic rate

    Calculates the cost of shipping a package within the United States.

  2. 02

    Calculate international rate

    Determines shipping rates for sending packages to international destinations.

  3. 03

    Get delivery commitments

    Retrieves official USPS service delivery estimates and commitments.

  4. 04

    Lookup usps city state

    Finds the correct city and state associated with a specific ZIP code.

Capability set02 / 02

05-08

4 capabilities in this set.

Part of 8 available through USPS Web Tools.

  1. 05

    Lookup usps zip code

    Identifies the exact ZIP code for a provided US address.

  2. 06

    Track usps package

    Checks the current status of a package using its tracking number.

  3. 07

    Track usps package advanced

    Provides detailed tracking history and granular event data for a shipment.

  4. 08

    Verify usps address

    Validates and standardizes US addresses against official USPS records.

Real work

What teams actually run

01

E-commerce Fulfillment

Verify customer addresses at checkout to prevent failed deliveries.

02

Shipping Cost Auditing

Compare domestic and international rates to find the best shipping options.

03

Package Monitoring

Track shipments and get instant updates on delivery status.

04

Regional Logistics Planning

Use ZIP code and city lookups to analyze geographic shipping reach.

Automate a task

Put USPS Web Tools to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

USPS Web Tools works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put USPS Web Tools to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

952ms average. Fast in production.

USPS Web Tools is checked daily against the live service.

Daily averagePeak 1227ms
Oct 3Today
Fastest day
770ms
Slowest day
1227ms
14-day trend
Improving-8%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 8 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of USPS Web Tools, so you can see the experience inside your AI.

It does not authenticate your account with USPS Web Tools. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

USPS Web Tools Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_R7DQnUcS3k7mzjKxMrsMbzxWu6CJTEhHjGrbKAVt/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — USPS Web Tools capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "usps-developer-portal-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_R7DQnUcS3k7mzjKxMrsMbzxWu6CJTEhHjGrbKAVt/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up USPS Web Tools in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work USPS Web Tools owners hand off.

This MCP is built for professionals managing physical goods and shipping data.

  • 01

    Logistics Managers

    They hand off package monitoring and timeline tracking to their agent.

  • 02

    E-commerce Leads

    They use the agent to verify customer addresses and audit delivery patterns.

  • 03

    Operations Leads

    They automate postal data queries to coordinate shipping teams.

FAQ

Questions USPS Web Tools owners ask.

  • 01

    What do I need to use this MCP?

    You will need a valid USPS Web Capabilities User ID to authenticate your requests.

  • 02

    Which AI clients can I use with this?

    You can use any MCP-compatible client, including Claude, Cursor, and Windsurf.

  • 03

    Can I track international packages?

    Yes, the MCP includes capabilities to calculate international rates and manage shipping data.

  • 04

    Does this verify if an address is real?

    Yes, the verify_usps_address capability standardizes and validates US addresses against official records.

  • 05

    How do I get shipping costs?

    You can use the calculate_domestic_rate or calculate_international_rate capabilities to get real-time costs.

  • 06

    How do I find my USPS User ID?

    Register for an account at the USPS Web Capabilities registration page. You will receive your User ID via email. Copy and paste it below.

  • 07

    Does it support international tracking?

    Yes. The track_usps_package capability supports tracking for any valid USPS tracking number, including international shipments originating from or delivered by USPS.

  • 08

    What is the format for address verification?

    The API requires an object with line1, city, and state metadata. Standardizing these inputs ensures the most accurate verification from the USPS database.

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