Contacts and Profile
Check Number
Checks whether one or more numbers are registered on WhatsApp. Returns JID, verified name, and status.
POST
https://api.zapzapapi.com/api/v1/{instanceId}/chat/checkAuthentication with the x-api-key and x-api-secret headers.
Parameters
| Name | Type | In | Required | Description |
|---|---|---|---|---|
numbers | textarea | body | Yes | Numbers to check (array) |
Request example
curl
curl -X POST "https://api.zapzapapi.com/api/v1/{instanceId}/chat/check" \
-H "x-api-key: YOUR_API_KEY" \
-H "x-api-secret: YOUR_API_SECRET" \
-H "Content-Type: application/json" \
-d '{"numbers":"[\"5511999999999\", \"5521888888888\"]"}'Node.js
const res = await fetch("https://api.zapzapapi.com/api/v1/{instanceId}/chat/check", {
method: "POST",
headers: {
"x-api-key": "YOUR_API_KEY",
"x-api-secret": "YOUR_API_SECRET",
"Content-Type": "application/json",
},
body: JSON.stringify({
"numbers": "[\"5511999999999\", \"5521888888888\"]"
}),
});
console.log(await res.json());Python
import requests
res = requests.post(
"https://api.zapzapapi.com/api/v1/{instanceId}/chat/check",
headers={"x-api-key": "YOUR_API_KEY", "x-api-secret": "YOUR_API_SECRET"},
json={"numbers":"[\"5511999999999\", \"5521888888888\"]"},
)
print(res.json())Response example
JSON
[
{
"query": "5511999999999",
"isInWhatsapp": true,
"jid": "5511999999999@s.whatsapp.net"
}
]Values are illustrative; the fields follow the real response format.
Other endpoints in this category
Get your API keys
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