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Latency: <1ms Edge Availability: 99.99% Standard: ISO 17442-1:2020 / GLEIF V8 Pure Compute

ISO 17442 Legal Entity Identifier (LEI) 20-Character MOD 97-10 Spec

Verify 20-character ISO 17442 LEI check digits, LOU prefix allocations, and entity identifiers.

Official Regulatory Standard & Verification Protocol Authority: Global Legal Entity Identifier Foundation (GLEIF) ↗

Quick Technical Summary: Verify 20-character ISO 17442 LEI check digits, LOU prefix allocations, and entity identifiers. Implementation conforms to ISO 17442 Legal Entity Identifier.

Execution SLA
<1ms Edge (Cloudflare V8)
Governing Norm
ISO 17442-1:2020 / GLEIF
Throughput Limit
512 KB / Payload
Data Privacy
100% In-Memory (Zero Store)

Specification & Structural Breakdown

An LEI is a 20-character alphanumeric string comprising a 4-character LOU prefix, 2 reserved characters (00), 12 alphanumeric entity characters, and 2 check digits.

PositionsComponentFormatDescription
1-4LOU Prefix4 alphanumeric charactersIdentifies accredited issuing LOU
5-6Reserved00Reserved characters for future expansion
7-18Entity ID12 alphanumeric charactersUnique legal entity identifier assigned by LOU
19-20Check Digits2 numeric digits (02-98)ISO 7064 MOD 97-10 checksum
Interactive Edge Validator

Test ISO 17442 Legal Entity Identifier (LEI) 20-Character MOD 97-10 Spec Live

Paste raw inputs up to 32KB and inspect deterministic parsed JSON in real-time across 330+ Cloudflare edge locations. Pure compute, zero cold-starts.

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Parsed JSON Response Model

The edge microservice transforms input payloads into strongly-typed hierarchical JSON with zero cold starts:

HTTP 200 JSON Payload
{
  "lei": "5493006MHB84DD0ZWV18",
  "lou": "5493",
  "valid": true
}

Copy-Paste Integration Code

Integrate this validator directly into your application using your production API key:

cURL
curl --request POST \
  --url "https://global-lei-corporate-tax-id-validator-api.stanzaapi.com/api/v1/lei/validate" \
  --header "Content-Type: application/json" \
  --header "x-api-key: YOUR_API_KEY" \
  --data '{
  "lei": "5493006MHB84DD0ZWV18"
}'
Node.js (Fetch)
const response = await fetch("https://global-lei-corporate-tax-id-validator-api.stanzaapi.com/api/v1/lei/validate", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "x-api-key": process.env.API_KEY || "YOUR_API_KEY"
  },
  body: JSON.stringify({
  "lei": "5493006MHB84DD0ZWV18"
})
});

const data = await response.json();
console.log(data);
Python (Requests)
import requests
import json

url = "https://global-lei-corporate-tax-id-validator-api.stanzaapi.com/api/v1/lei/validate"
headers = {
    "Content-Type": "application/json",
    "x-api-key": "YOUR_API_KEY"
}
payload = {
    "lei": "5493006MHB84DD0ZWV18"
}

response = requests.post(url, json=payload, headers=headers)
print(response.json())
Go
package main

import (
	"bytes"
	"fmt"
	"io"
	"net/http"
	"os"
)

func main() {
	url := "https://global-lei-corporate-tax-id-validator-api.stanzaapi.com/api/v1/lei/validate"
	payload := []byte(`{"lei":"5493006MHB84DD0ZWV18"}`)

	req, _ := http.NewRequest("POST", url, bytes.NewBuffer(payload))
	req.Header.Add("Content-Type", "application/json")
	req.Header.Add("x-api-key", os.Getenv("API_KEY"))

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)
	fmt.Println(string(body))
}

Frequently Asked Questions & Technical Notes

Can an LEI contain special characters or lowercase letters?

No, LEIs consist strictly of uppercase English letters (A-Z) and digits (0-9).

Related Global LEI & Corporate Tax ID Validator API Formats

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