MCP.Market

Usps MCP server

by mrfentmen·io.github.mrfentmen/usps-mcp·v1.0.0
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USPS shipping, tracking, address validation, and label creation.

C55/100grade C
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Safety scan
C55/100

full report

Adoption
New

233 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Usps tools (8, 1 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • create_labelwrite action

    Create a USPS shipping label.

  • get_address_info

    Get city/state info from ZIP code.

  • get_rate

    Get USPS shipping rate estimate.

  • get_service_standards

    Get delivery standards between ZIP codes.

  • get_zip_code

    Look up ZIP code by city and state.

  • schedule_pickup

    Schedule a USPS pickup.

  • track_package

    Track a USPS package.

  • validate_address

    Validate a USPS address.

Public scan report

scanner v0.1.10 · 2026-10-28 · same rubric, same numbers if you re-run it

no findings
  • Code scan7 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancerepository not readable: repo not found3/15
  • Maintainer identityno repository or website to verify2/10
Overall 55/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Usps compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
55/100
higher than 10% of 48,255 servers
Tools
8
the typical server has 7
Tools that change things
13%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
233
more than 77% of 12,191 servers with a package

What its tools let an agent do: 7 read · 1 create

Install Usps in Claude Code, Cursor or VS Code

Runs npx -y usps-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add usps-mcp -- npx -y usps-mcp
Add to Cursor

Usps: common questions

Is Usps MCP server safe?
With care: it is graded C, so read the findings first (55/100). Read the Usps safety report
How do I install Usps?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Usps need an API key?
Yes. The registry entry asks for USPS_API_KEY, USPS_PASSWORD.
Is Usps maintained?
The latest release is v1.0.0.
How does Usps compare with other MCP servers?
safety score 55/100 (higher than 10% of 48,255 servers); tools 8 (the typical server has 7); tools that change things 13% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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