Tool detail

Eckari

Identifies which shipping carrier issued a tracking number using prefix, length and check-digit signatures, with ranked candidates and match confidence.

Categories: Shopping

Use when

find out which carrier a tracking number belongs to
validate a tracking number's UPU S10 check digit
get ranked carrier candidates for an ambiguous tracking number

Not for

not a live tracking or shipment-status lookup
not for numbers shorter than 4 or longer than 60 characters

Inputs

GET query params: tracking_number: string (required); origin_country, destination_country: 2-letter ISO codes (optional)

Admitted input schema

{
  "type": "object",
  "properties": {
    "destination_country": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "pattern": "^[A-Za-z]{2}$",
      "description": "Optional ISO 3166-1 alpha-2 destination country hint. Used only as a small tie-breaker; it never invents a candidate."
    },
    "origin_country": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "pattern": "^[A-Za-z]{2}$",
      "description": "Optional ISO 3166-1 alpha-2 origin country hint. Used only as a small tie-breaker; it never invents a candidate."
    },
    "tracking_number": {
      "type": "string",
      "minLength": 4,
      "maxLength": 60,
      "pattern": "^[A-Za-z0-9 -]+$",
      "description": "Tracking or consignment number. Spaces and hyphens are removed and letters upper-cased before matching (4-40 letters and digits after normalisation). Digits and letters are never altered."
    }
  },
  "required": [
    "tracking_number"
  ],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://api.eckari.com/v1/parcels/detect-carrier

Payment

Protocol: x402
Listed price: 0.001 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://api.eckari.com/v1/parcels/detect-carrier
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z