Bring Address Verification
to Cursor
Create your Vinkius account to connect USPS Developer Portal to Cursor and start using all 8 AI tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code. No hosting, no server setup — just connect and start using.
GDPR Free for SubscribersCompatible with every major AI agent and IDE
Gemini
What is the USPS Developer Portal MCP Server?
Empower your AI agent to orchestrate your entire postal logistics and address auditing workflow with the USPS Developer Portal, the official source for United States Postal Service data. By connecting USPS Web Tools to your agent, you transform complex shipping tasks into a natural conversation. Your agent can instantly verify addresses, audit package tracking statuses, and retrieve ZIP code metadata without you ever touching a shipping portal. Whether you are managing e-commerce deliveries or conducting regional address audits, your agent acts as a real-time logistics consultant, ensuring your data is always verified and precise.
What you can do
- Address Auditing — Standardize and verify United States addresses to ensure your shipping metadata is always grounded in official USPS records.
- Advanced Tracking Control — Track real-time package statuses and access granular facility-level tracking events instantly.
- ZIP Code & Routing Discovery — Cross-reference ZIP codes with city/state pairs to understand the geographic reach of your logistics.
- Domestic & International Rates — Accurately calculate the real-time cost of shipping across various mail classes, weights, and global destinations.
- Service Delays & Commitments — Query live delivery commitments by mail class to accurately orchestrate e-commerce fulfillment.
How it works
- Subscribe to this server
- Enter your USPS Web Tools User ID
- Start managing your postal intelligence through Claude, Cursor, or any MCP-compatible client
Who is this for?
- Logistics Managers — monitor package timelines and retrieve official metadata straight from your workflow.
- E-commerce Leads — verify customer addresses and audit delivery patterns without manual searching.
- Address Researchers — perform rapid audits of US locations and identify relevant ZIP markers through natural language.
- Operations Leads — automate postal data querying to orchestrate cross-functional shipping teams smoothly.
Built-in capabilities (8)
Calculate USPS domestic shipping rates
Calculate USPS international shipping rates
Get USPS service delivery commitments and estimates
Look up the city and state for a ZIP code
Look up the exact ZIP code for a specific US address
Track a USPS package using a tracking number
Get advanced tracking information for a USPS package
Verify and standardize a US address using USPS Web Tools
Why Cursor?
Cursor's Agent mode turns USPS Developer Portal into an in-editor superpower. Ask Cursor to generate code using live data from USPS Developer Portal and it fetches, processes, and writes. all in a single agentic loop. 8 tools appear alongside file editing and terminal access, creating a unified development environment grounded in real-time information.
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Agent mode turns Cursor into an autonomous coding assistant that can read files, run commands, and call MCP tools without switching context
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Cursor's Composer feature can generate entire files using real-time data fetched through MCP. no copy-pasting from external dashboards
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MCP tools appear alongside built-in tools like file reading and terminal access, creating a unified agentic environment
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VS Code extension compatibility means your existing workflow, keybindings, and extensions all work alongside MCP tools
USPS Developer Portal in Cursor
Why run USPS Developer Portal with Vinkius?
The USPS Developer Portal connection runs on our fully managed, secure cloud infrastructure. We handle the hosting, maintenance, and security so you don't have to deal with servers or code. All 8 tools are ready to work instantly without any complex setup.
You stay in complete control of your data. Your AI only accesses the information you approve, keeping your sensitive passwords and private details completely safe. Plus, with automatic optimizations, your AI works faster and more efficiently.
* Every connection is hosted and maintained by Vinkius. We handle the security, updates, and infrastructure so you don't have to write code or manage servers. See our infrastructure
Over 4,000 integrations ready for AI agents
Explore a vast library of pre-built integrations, optimized and ready to deploy.
Connect securely in under 30 seconds
Generate tokens to authenticate and link external services in a single step.
Complete visibility into every agent action
Audit live requests, latency, success rates, and active security compliance policies.
Optimize spending and track token ROI
Analyze real-time token consumption and cost metrics detailed by connection.
Explore our live AI Agents Analytics dashboard to see it all working
This dashboard is included when you connect USPS Developer Portal using Vinkius. You will never be left in the dark about what your AI agents are doing with your tools.
USPS Developer Portal and 4,000+ other AI tools. No hosting, no code, ready to use.
Professionals who connect USPS Developer Portal to Cursor through Vinkius don't need to write code, manage servers, or worry about security. Everything is pre-configured, secure, and runs automatically in the background.
Raw MCP | Vinkius | |
|---|---|---|
| Ready-to-use MCPs | Find and configure each manually | 4,000+ MCPs ready to use |
| Connection Setup | Manual coding & server setup | 1-click instant connection |
| Server Hosting | You host it yourself (needs 24/7 uptime) | 100% hosted & managed by Vinkius |
| Security & Privacy | Stored in plaintext config files | Bank-grade encrypted vault |
| Activity Visibility | Blind execution (no logs or tracking) | Live dashboard with real-time logs |
| Cost Control | Runaway AI token spend risk | Automatic budget limits |
| Revoking Access | Must delete files or code to stop | 1-click disconnect button |
How Vinkius secures
USPS Developer Portal for Cursor
Every request between Cursor and USPS Developer Portal is protected by our secure gateway. We automatically keep your sensitive data private, prevent unauthorized access, and let you disconnect instantly at any time.
Frequently asked questions
How do I find my USPS User ID?
Register for an account at the USPS Web Tools registration page. You will receive your User ID via email. Copy and paste it below.
Does it support international tracking?
Yes. The track_usps_package tool supports tracking for any valid USPS tracking number, including international shipments originating from or delivered by USPS.
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.
What is Agent mode and why does it matter for MCP?
Agent mode is Cursor's autonomous execution mode where the AI can perform multi-step tasks: reading files, editing code, running terminal commands, and calling MCP tools. Without Agent mode, Cursor operates in a simpler ask-and-answer mode that doesn't support tool calling. Always ensure you're in Agent mode when working with MCP servers.
Where does Cursor store MCP configuration?
Cursor looks for MCP server configurations in a mcp.json file. You can configure servers at the project level (.cursor/mcp.json in your project root) or globally (~/.cursor/mcp.json). Project-level configs take precedence.
Can Cursor use MCP tools in inline edits?
No. MCP tools are only available in Agent mode through the chat panel. Inline completions and Tab suggestions do not trigger MCP tool calls. This is by design. tool calls require user visibility and approval.
How do I verify MCP tools are loaded?
Open Settings → Features → MCP and look for your server name. A green indicator means the server is connected. You can also check Agent mode's available tools by clicking the tools dropdown in the chat panel.
Tools not appearing in Cursor
Ensure you are in Agent mode (not Ask mode). MCP tools only work in Agent mode.
Server shows as disconnected
Check Settings → Features → MCP and verify the server status. Try clicking the refresh button.
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