OSM Worldwide package tracking, and the API behind it.
US consolidator that sorts e-commerce parcels and hands them to USPS for final delivery. One free lookup a day, no sign-up.
Also known as OSM, One Stop Mailing.
OSM Worldwide tracking numbers
We recognize these formats from the number alone. For anything else from OSM Worldwide, add ?carrier=osm.
- OSM
- OSM + 14 letters and digits
- USPS barcode
- the 22-digit USPS number, with ?carrier=osm
- Example (format only)
- OSM4F7K2Q9X1B3D5H
- Category
- Regional and last mile
- API carrier code
- osm
OSM Worldwide tracking API quickstart
One request per number, or up to 100 at once with ?numbers=a,b,c. Your agents can use the same data over MCP.
REST
curl "https://api.lastscanned.com/v1/track/OSM4F7K2Q9X1B3D5H?carrier=osm"Claude Code
claude mcp add --transport http lastscanned https://mcp.lastscanned.comThen ask
> Where is my OSM Worldwide package OSM4F7K2Q9X1B3D5H? When will it arrive?
OSM Worldwide tracking FAQ
- How do I track a OSM Worldwide package?
- Paste the tracking number into the lookup on this page. We read OSM Worldwide's own tracking data and show every scan, the current status and the delivery details. Anyone can do one lookup a day without signing up.
- Is there a OSM Worldwide tracking API?
- Yes. GET https://api.lastscanned.com/v1/track/:number?carrier=osm returns OSM Worldwide tracking as JSON, in the same shape as every other carrier lastscanned covers. Sign up for a free key with 5 lookups a day, or Pro for $4.99 a month with 1,000 numbers.
- What does a OSM Worldwide tracking number look like?
- OSM: OSM + 14 letters and digits; USPS barcode: the 22-digit USPS number, with ?carrier=osm. For example OSM4F7K2Q9X1B3D5H. lastscanned recognizes these formats on its own, so ?carrier=osm is optional for them.
- Does this work for OSM and One Stop Mailing numbers?
- Yes. They are tracked through OSM Worldwide and come back as carrier "osm".
- Can an AI agent track OSM Worldwide packages?
- Yes. Add lastscanned as an MCP server (https://mcp.lastscanned.com) in Claude, ChatGPT, Cursor or VS Code and ask it where a OSM Worldwide parcel is.
Other carriers
Major carriers
Regional and last mile
Tracking pages are for people. This is for your code.
Every carrier shows a parcel differently. lastscanned reads them all and answers in one shape, so your app, your spreadsheet or your agent handles any carrier the same way.
| Carrier website | lastscanned API | |
|---|---|---|
| Carriers | One carrier per site | 31 carriers behind one endpoint |
| Response | A web page to read | The same JSON for every carrier |
| Volume | One number at a time | Up to 100 numbers per request |
| Agents | Copy and paste | MCP server for Claude, ChatGPT and Cursor |
| Automation | Check back by hand | Poll from your own code or workflow |
Free: 5 numbers a day with a key. Pro: $4.99 a month for 1,000 numbers, then $0.015 each.