# postalref (postalref.com)

Decodes USPS package barcodes and tracking numbers, and looks up service type codes and mailing terms from USPS documents.

- Atlas card: https://inite.ai/en/atlas/postalref.com
- Site: https://postalref.com
- For: Mailing and shipping staff, and AI agents, decoding USPS package barcodes and looking up postal terms
- Use not measured/100 · alive 100/100

## Used for

- look up what a USPS service type code means
- decode the service type code in a tracking number
- see which codes changed in a USPS revision

## Price

Not read yet.

## For developers

- MCP server: com.postalref/postalref (namespace; open on 2026-10-31, 7 tools)
- Read 2026-10-31

## MCP server, measured daily

Server: https://postalref.com/mcp, checked every day since 2026-10-31 (4 checks).

- Answered: measuring, 4 daily checks so far
- Median first answer: 1216 ms
- Sign-in: none
- Context its tool definitions take: about 1428 tokens (7 tools)
- Tool definitions: A, 98/100
- Failing "params_described": 1 of 7 tools
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-31

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Source: INITE Atlas, https://inite.ai/en/atlas/postalref.com. JSON: https://inite.ai/api/atlas/postalref.com. MCP: https://inite.ai/api/mcp (atlas_lookup).