# Multi-Carrier Package Tracking (USPS, UPS, FedEx)

An automation tool your agent can run on one prepaid apifare key. Page: https://apifare.com/tools/alizarin_refrigerator-owner/multi-carrier-package-tracking-usps-ups-fedex

## What you need

An apifare key with credits (sign up: POST https://apifare.com/v1/signup {"email": "..."}; new accounts get 500 free credits). No other account or key.

## Inputs

- `trackingNumbers` (array, required): Tracking Numbers
- `demoMode` (boolean): Demo Mode
- `uspsUserId` (string): USPS Web Tools User ID
- `upsClientId` (string): UPS Client ID
- `upsClientSecret` (string): UPS Client Secret
- `fedexApiKey` (string): FedEx API Key

The most relevant fields; the search result's input_schema lists all of them.

## Price

5 credits reserved per run, settled to the run's true cost, never more than 20 credits (1 credit = $0.01). Failed runs are refunded. Exact numbers: https://apifare.com/capabilities

## Run it

1. Find it: MCP search_apis, or GET https://apifare.com/v1/search?q=Multi-Carrier%20Package%20Tracking%20(USPS%2C%20UPS%2C%20FedEx) with Authorization: Bearer <token>. Take the result named "Multi-Carrier Package Tracking (USPS, UPS, FedEx)"; it carries a proxy_route.
2. Run it: MCP proxy_call with that proxy_route and the input JSON (apifare-mcp over stdio), or POST the proxy_route over HTTP with the input JSON as the body and the same Authorization header.
3. On HTTP 402, relay the body's human_readable field to your human verbatim, wait, then retry the same call. Every other error and its fix: https://apifare.com/errors.md