MCP for AI agents
https://mcp.lastscanned.com is an MCP server (Streamable HTTP) over the same API. It signs in with your API key, and lookups count toward the same usage and limits as REST calls.
It also connects with no key at all: track_package then gets the same one free lookup a day as the REST API, and list_carriers always works. An MPP credit key (lsk_pack_…, from paying per request) works anywhere an API key does and spends its credits.
Set up
claude mcp add --transport http lastscanned https://mcp.lastscanned.com \
--header "Authorization: Bearer lsk_live_…"Other clients (Windsurf and the rest): an HTTP server at https://mcp.lastscanned.com with the header Authorization: Bearer lsk_live_….
ChatGPT connectors can't send a header, so the key goes in the URL path instead. Treat that URL like the key itself. When you make a key in the dashboard, it shows each of these with your key filled in.
Tools
| Tool | Arguments | Returns |
|---|---|---|
track_package | tracking_number, carrier? | Status, estimated delivery and scan history: a tracking result. |
track_packages | tracking_numbers (up to 100, 35 per carrier), carrier? | { results }, one entry per number with result or error. |
list_carriers | Carrier ids for carrier. |
Behavior
- Stateless: each POST is one JSON-RPC message answered with plain JSON. No sessions, no SSE.
- A failed lookup comes back as a tool result with
isError: trueand the same{ "error": { "code", "message" } }as the REST API, so the model can read it. - When the free lookup or the daily limit is used up, or a key is invalid, the error also carries what to tell the person:
user_action, plussignup_url,lookup_url,upgrade_urlorsetup_commandas they apply.track_packagesneeds a key (auth_required). - A successful result can carry a
notice(the free lookup or the day's last free number was just used, or a credit key is running low) and, with a credit key,credits_remaining. GET https://mcp.lastscanned.com/and/.well-known/mcp.jsondescribe the server (name, tools, endpoint) for MCP registries.- Also served at
https://api.lastscanned.com/mcp.