How do I get a 4PX tracking URL from a tracking number?

Send the tracking number to ShipShim's API (POST /api/v1/track) and it returns the direct 4PX tracking link, the detected carrier, and a confidence score. For the example number 4PX8888888 the tracking URL is https://track.4px.com/query/4PX8888888.

What if my number matches more than one carrier?

ShipShim returns a ranked list of every matching carrier with confidence scores, and you can lock the result by passing the carrier name or a country hint.

4PX tracking URL from a tracking number

Q: What does a 4PX tracking number look like?

4PX tracking numbers follow this format: 4PX or DF prefix + alphanumeric (10-30 chars). Example: 4PX8888888.

4PX (CN) tracking numbers follow this format: 4PX or DF prefix + alphanumeric (10-30 chars). ShipShim detects the carrier from the number and returns the direct tracking link.

Example: number in, tracking URL out

Example tracking number	`4PX8888888`
Tracking URL	https://track.4px.com/query/4PX8888888

This format is distinctive, so ShipShim identifies 4PX from the bare number — no hints needed.

Get the 4PX tracking link via API

curl -X POST https://shipshim.com/api/v1/track \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"tracking_number": "4PX8888888"}'

Response:

{
    "tracking_number": "4PX8888888",
    "carrier": "4PX",
    "country": "CN",
    "tracking_url": "https://track.4px.com/query/4PX8888888",
    "confidence": 100,
    "matches": [
        {
            "carrier": "4PX",
            "country": "CN",
            "confidence": 100,
            "tracking_url": "https://track.4px.com/query/4PX8888888"
        }
    ]
}

Get a free API key Read the API reference — the free tier includes 100 calls/month.

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