Selcom API Gateway · IP Whitelist & Connectivity Diagnostic

Gateway Credentials

Base URL

Custom Base URL

API Key

API Secret

Vendor Code

Force IPv4 (CURL_IPRESOLVE_V4)

Webhook Signature Validator

Test whether incoming Selcom webhook HMAC digest matches your API secret.

Inbound Timestamp Header

Signed-Fields Header

Received Digest Header

1. Server Egress & Outbound Identity

Public Outbound IPv4

Detecting...

Reflector Latency

-- ms

Local Hostname

PHP / cURL

Resolved Selcom IPs: Querying...

2. Gateway Reachability & Whitelist Probes