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GS1 GLN Validator
x402
GS1 GLN Validator is a paid API for AI agents from 2s.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates a 13-digit GS1 Global Location Number (GLN) using the GS1 mod-10 check digit algorithm, returning validity status, parsed check digit, and failure reason.
Price / call$0.001
Success—
StatusUnknown
How this service works
Validate a GS1 GLN (Global Location Number) — 13 digits with the GS1 mod-10 check digit. GLNs identify trading parties and physical locations (ship-to, bill-to, warehouse) across CPG supply chains and EDI. Returns {valid, gln, checkDigit, reason}. Catches transposed digits a length check misses.
Output
Returns a JSON object with: valid (boolean indicating if the GLN passes GS1 mod-10 check digit validation), gln (the normalized GLN string), checkDigit (the extracted check digit), and reason (a human-readable explanation if validation fails, e.g. transposed digits or wrong length).
Example use cases
Example prompt
“Can you check whether this GLN is valid: 0614141999996? I want to make sure the check digit is correct before we send the EDI 856 shipment notice.”
Technical details
Endpoint
GEThttps://2s.io/api/validate/glnWhen to prefer
Use this endpoint when you need to verify the structural integrity of a GS1 GLN before using it in EDI transactions, supply chain systems, or trading partner onboarding. It is specifically valuable because it catches transposed-digit errors that a simple length check would miss. Prefer this over manual mod-10 computation or generic barcode validators when working with CPG, retail, or logistics workflows that rely on GS1 standards.
Side effects
- Missing or empty gln query parameter — returns validation error
- GLN is not exactly 13 digits after stripping spaces/hyphens — returns invalid with reason about length
- Check digit does not match GS1 mod-10 calculation — returns valid:false with reason indicating check digit mismatch
- Non-numeric characters (other than allowed spaces/hyphens) — returns invalid with reason
- Payment not provided or insufficient — 402 Payment Required
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"gln": "0614141999996"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"data": {
"ok": true,
"items": [
{
"gln": "0614141999996",
"input": "0614141999996",
"valid": true,
"reason": null,
"checkDigit": "6"
}
],
"total": 1,
"source": {
"url": "https://2s.io",
"license": "No upstream license — computed by 2s.io",
"provider": "2s.io GLN validator"
}
},
"meta": {
"cost": {
"usd": 0.001,
"tier": 0
},
"caller": "x402",
"version": null,
"endpoint": "validate.gln",
"settlement": {
"txHash": "0xfac33af0a063175e6b3092a67b15636c281fa0c045eda26d8065e4a08655dd42",
"network": "eip155:8453",
"success": true
}
}
}Tags
x402
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