Validate identifiers by check digit
Validate identifiers by check digit - ISIN, CUSIP, SEDOL, LEI, ISBN, EAN or UPC, IMEI, VIN, ORCID, ISSN, NPI, DOI and cards, or auto-detect the type
Answeringour last check, 2026-10-20
1 of 1checks answered this week
288 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/validate/identifier
| Category | Company and compliance |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-20 | valid payment request | 402 | $0.01 | 288 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"type": "isin",
"value": "US0378331005"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"type": {
"description": "optional auto (default, tries all) or luhn, credit_card, imei, isin, cusip, sedol, lei, isbn10, isbn13, gtin, issn, orcid, npi, vin, doi",
"type": "string"
},
"value": {
"description": "The identifier to check",
"type": "string"
}
},
"required": [
"value"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"country": {
"description": "Country name",
"type": [
"string",
"null"
]
},
"nsin": {
"description": "National security identifier part of an ISIN",
"type": [
"string",
"null"
]
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"type": {
"description": "Type or kind",
"type": "string"
},
"valid": {
"description": "True when the input passed validation",
"type": "boolean"
},
"value": {
"description": "Value of the requested item",
"type": "string"
}
},
"required": [
"value",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}