Built for developers • Early access

Verify software licenses with one API call.

One API to issue, validate, and track software licenses. No custom logic. No maintenance.

Developer Early Access — help shape Keyfox before launch.

Get engineering updates and first access to the API. No spam.

Built by engineers, for engineers.

API preview — /verify endpoint

# Verify any license key with one request
POST https://api.keyfox.io/v1/verify

Headers:
  x-api-key: YOUR_API_KEY

Body:
  license: KFX-XXXX-XXXX

→ Response (200 OK)

{
  "valid": true,
  "status": "Active",
  "licenseKey": "KFX-XXXX-XXXX",
  "reason": null
}

Early access preview — responses are mocked while we finalize the API. Your feedback shapes the real implementation.

You shouldn't be rebuilding licensing every time you ship a product.

Developers lose weeks rebuilding activation, renewal, and validation logic — all to ship a feature that has nothing to do with licensing.

Hand-rolled solutions turn into fragile validation code, messy expiration checks, and endless edge cases. One bad key or skipped check becomes a production bug.

Every hour spent fixing licensing issues is an hour not spent improving your product.

Repetition

Activation, renewal, expiration, and validation — every new project starts from zero and grows into the same boilerplate again.

Security

Quick fixes expose keys, allow unchecked paths, or let invalid licenses pass silently. One skipped check becomes a vulnerability.

Maintenance

Custom license logic becomes harder to maintain, harder to test, and harder to trust. More patches mean more bugs and more tech debt.

The solution

From brittle license logic to one clean API call.

Endless renewals, fragile validation code, and unpredictable edge cases disappear. Keyfox replaces hundreds of lines of brittle logic with one reliable, ready-to-use API.

You don't need to rebuild activation, expiration, and validation flows anymore. Keyfox does the heavy lifting so you can focus on your product.

const key = getUserLicenseKey()

if (!key) return console.error("No license found!")

const expired = checkIfExpired(key)
const valid = !expired && validateKey(key)

if (!valid) {
  renewKey(key)
  const renewed = validateKey(key)
  if (!renewed) return console.error("License invalid.")
}

console.log("License valid!")

const client = new Keyfox({ 
  apiKey: process.env.KEYFOX_API_KEY 
});

// Validate a license key with a single API call
const result = await client.verify("KFX-XXXX-XXXX");

if (result.valid) {
  console.log("License valid!");
  // Continue with your application logic
}

No rewrites. No renewal logic. No brittle checks. Just one API that works every time.

API Examples

Preview real Keyfox responses — mocked during early access while we finalize the API.

Valid License

Validation example

REQUEST

POST /v1/verify

Headers:

  x-api-key: YOUR_API_KEY

Body:

  license: KFX-XXXX-XXXX

RESPONSE

200 OK

{
  "valid": true,
  "status": "Active",
  "licenseKey": "KFX-XXXX-XXXX",
  "reason": null
}

Expired License

Validation example

REQUEST

POST /v1/verify

Headers:

  x-api-key: YOUR_API_KEY

Body:

  license: KFX-XXXX-XXXX

RESPONSE

200 OK

{
  "valid": false,
  "status": "Expired",
  "reason": "expired"
}

Revoked License

Validation example

REQUEST

POST /v1/verify

Headers:

  x-api-key: YOUR_API_KEY

Body:

  license: KFX-XXXX-XXXX

RESPONSE

200 OK

{
  "valid": false,
  "status": "Revoked",
  "reason": "revoked_by_admin"
}

Platform

Built for developers, not legacy vendors.

A modern licensing platform built to remove boilerplate, simplify validation, and give you clean, predictable control — without the bloat or black boxes of traditional vendors.

Modern Licensing API

Issue, validate, and renew keys with a clean, typed, idiomatic REST API. No SDK lock-in. No proprietary formats. No legacy clutter.

Zero Boilerplate

No more expiration checks, renewal flows, or 'is this key still valid?' logic. Keyfox handles lifecycle complexity so you don't have to write a single helper function.

Secure by Default

Key validation powered by signatures, HTTPS, and strict schema rules. No shared secrets, no custom crypto, no hand-rolled verification paths.

Self-Hosted or Cloud

Run Keyfox anywhere — your infrastructure or ours. Control regions, data, and scaling with a fully portable API.

Get early access
to the Keyfox API

Get API preview access, sample code, and early feature updates.

Trusted by developers building SaaS apps, internal tools, and commercial software.

No marketing. No sales emails. Just technical updates and early access details.

Early members get priority when API keys are released.

Verify software licenses with one API call.

You shouldn't be rebuilding licensing every time you ship a product.

From brittle license logic to one clean API call.

API Examples

Built for developers, not legacy vendors.

Get early accessto the Keyfox API

Get early access
to the Keyfox API