USPS Developer Portal MCP Server
Manage US mail — audit addresses, tracking, and ZIP codes via AI.
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What is the USPS Web Tools MCP Server?
The USPS Web Tools MCP Server gives AI agents like Claude, ChatGPT, and Cursor direct access to USPS Web Tools via 8 tools. Manage US mail — audit addresses, tracking, and ZIP codes via AI. Powered by the Vinkius - no API keys, no infrastructure, connect in under 2 minutes.
Built-in capabilities (8)
Tools for your AI Agents to operate USPS Web Tools
Ask your AI agent "Verify address '1600 Pennsylvania Avenue NW, Washington, DC 20500' using USPS." and get the answer without opening a single dashboard. With 8 tools connected to real USPS Web Tools data, your agents reason over live information, cross-reference it with other MCP servers, and deliver insights you would spend hours assembling manually.
Works with Claude, ChatGPT, Cursor, and any MCP-compatible client. Powered by the Vinkius - your credentials never touch the AI model, every request is auditable. Connect in under two minutes.
Why teams choose Vinkius
One subscription gives you access to thousands of MCP servers - and you can deploy your own to the Vinkius Edge. Your AI agents only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure and security, zero maintenance.
Build your own MCP Server with our secure development framework →Vinkius works with every AI agent you already use
…and any MCP-compatible client
USPS Developer Portal MCP Server capabilities
8 toolsCalculate 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
What the USPS Developer Portal MCP Server unlocks
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
1. Subscribe to this server
2. Enter your USPS Web Tools User ID
3. 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.
Frequently asked questions about the USPS Developer Portal MCP Server
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.
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Connect USPS Developer Portal with your favorite client
Step-by-step setup guides for every MCP-compatible client and framework:
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Give your AI agents the power of USPS Web Tools MCP Server
Production-grade USPS Developer Portal MCP Server. Verified, monitored, and maintained by Vinkius. Ready for your AI agents — connect and start using immediately.