Marketplace · API · x402

toll402.dev/v1/t/cvr_dk_validate

Offline validator for a Danish CVR-nummer (8-digit business registration number issued by the Danish Business Authority). Normalizes input to digits only, checks length and computes a modulus-11 checksum using weights 2,7,6,5,4,3,2 on the first 7 digits compared against the 8th check digit. Result is flagged as best-effort since some legacy CVR numbers do not conform to the checksum rule.

Endpoint	`https://toll402.dev/v1/t/cvr_dk_validate`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~229 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x318d34fa0bd69eff17fac648d2df8cf7a88b3dbe
method	POST
last updated	2026-11-11T15:53:44.191Z

Use it

Call it (an x402 client pays automatically)

curl -i https://toll402.dev/v1/t/cvr_dk_validate
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-26910c32039bce5f

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}