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Api Endpoint

ISIN Validator

Deterministic ISIN check before routing an order or paying a market-data API: structure regex (2-letter country or XS/EU, 9-char NSIN, check digit) and the Luhn checksum over the base-36 expansion. Query: ?isin=US0378331005. Returns valid, country_code, nsin, check_digit and is_international. A corrupted ISIN means a rejected order or the wrong instrument. Pure offline computation, 1y cache.

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Offering

Provider
data.greeneris.io
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Financial Analysis
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://data.greeneris.io/v1/validate/isin
MIME type
application/json
First seen
2026-10-16T01:51:20.002Z
Last seen
Tags
isin, Validation, securities, Trading, Finance, checksum

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.002 USDC
Atomic price: 2000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "payTo": "0x6ab8efe305cce67daa48c97bde29c04402822dff"
  }
]

Observed health

Status
Healthy
Latest latency
104 ms
Average latency
470 ms
HTTP status
402
Last checked
Reachability
100% over 13 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "required": [
        "isin"
      ],
      "properties": {
        "isin": {
          "type": "string",
          "description": "ISIN to validate, 12 characters"
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "json",
  "example": {
    "isin": "US0378331005",
    "nsin": "037833100",
    "valid": true,
    "source": "offline ISO 6166 structure + Luhn base-36 checksum (no securities reference data)",
    "check_digit": "5",
    "country_code": "US",
    "is_international": false
  }
}