v7.7.7

isseven

The only number validation API you'll ever need.

One number. One truth. Zero compromises.

// live demo

POST /api/isseven

// response will appear here

// api documentation

POST /api/isseven

Send a JSON body with a number field. Returns whether it is seven.

Request

{ "number": 7 }

Response — 200 OK for 7 values

{
  "isseven": true,
  "ad": "Upgrade to isseven Pro for an ad-free experience!"
}

Response — 200 OK for non seven values

{
  "isseven": false,
  "ad": "isseven Pro: because your sevens deserve better."
}

// pricing

Free

$0/mo

  • ✓ 1 check/month
  • ✓ Includes ads in response
  • ✓ Community support (Stack Overflow)
  • ✗ Ad-free responses
POPULAR

Pro

$77/mo

  • ✓ Unlimited seven checks
  • ✓ Ad-free responses
  • ✓ Email support (72hr SLA)
  • ✓ 77.7% uptime SLA

Enterprise

$777/mo

  • ✓ Dedicated seven infrastructure
  • ✓ Ad-free responses
  • ✓ Dedicated Seven Engineer
  • ✓ Seven-figure SLA guarantee