Setup guide

Splunk HEC setup guide for sslcertificates.io

This guide explains how to connect Splunk HEC to sslcertificates.io, what credentials to prepare, and how to operate safely in Test (Let's Encrypt Staging) and Live (publicly trusted issuance) environments.

What this integration does

Splunk HEC: HTTP Event Collector audit export.

Category: Observability & SIEM. Public integration page: /integrations/splunk.

Outcomes

Export your certificate and audit events to Splunk HEC
Alert on unexpected issuance or expiry in your SIEM

Prerequisites

Active Splunk HEC account
API access
Write-only credentials. Metrics never include tokens, private keys or customer PEMs.

Authentication and credentials

Authentication mode in the catalog: api_key.

Fields the connection form expects: DSN / token / endpoint (optional); Endpoint (optional)

Store secrets in a password manager while you paste them once into sslcertificates.io. Values are encrypted at rest and are not shown again after save. Prefer narrowly scoped credentials over admin passwords.

Write-only credentials. Metrics never include tokens, private keys or customer PEMs.

Permissions (least privilege)

Write-only credentials. Metrics never include tokens, private keys or customer PEMs.

Scraping /metrics does not require a third-party contract.

Connect in the workspace

Sign in to sslcertificates.io
Open Integrations
Choose Splunk HEC
Enter the connection details
Test the connection
Select the resources you want to manage

After Test connection succeeds, run Discover so the platform lists zones, subscriptions, domains, or deploy targets you are allowed to see. Select only resources this organization should manage.

Test vs Live certificate environments

Test uses Let's Encrypt Staging as the CA directory. Staging certificates are not trusted by browsers; use them to prove DNS-01, HTTP-01, deploy scripts, and webhooks without consuming production rate limits.

Live uses Let's Encrypt Production (or a commercial CA you connect) for publicly trusted certificates. The integration connection is the same; only the API key environment and CA selection on the certificate order change.

Create separate API keys labeled Test and Live. Do not reuse a Live key in CI that hammers validation endpoints.

Notifications and exports

Configure Splunk HEC to receive webhook-style certificate events from sslcertificates.io. This is operational alerting — not domain validation. Verify signing secrets and retry behavior on your receiver.

Discovery

Discovery runs only after authentication succeeds. The integration enumerates resources the credential may read — hosted zones, subscriptions, domains, clusters, or load balancers depending on Splunk HEC. If discovery returns empty, the credential is usually too narrow or pointed at the wrong account or region.

Renewal and ongoing operation

When Splunk HEC participates in deployment or DNS automation, renewals re-use the same connection. Watch webhook events such as certificate.renewal_failed and verify the external endpoint after every replacement. A renewed certificate in inventory is not proof HTTPS serves the new leaf.

Disconnect and credential rotation

Open Workspace → Integrations → Splunk HEC → Disconnect to remove stored credentials from this organization. DNS integrations should delete only TXT records the platform created for ACME challenges. Rotate vendor tokens on a schedule; update the integration, run Test connection, and revoke the old credential at the vendor.

Troubleshooting

Symptom	Likely cause	What to do
Test connection fails immediately	Wrong host, region, or token	Re-copy credentials; confirm clock skew and TLS to the vendor API
Discovery is empty	Scoped IAM/token cannot list resources	Widen read permissions temporarily, discover, then tighten
Order stuck validating	DNS or HTTP challenge not public yet	Inspect the order challenges; wait for propagation; POST validate
Deploy reported success but HTTPS unchanged	Old cert still bound on the edge	Compare served SHA-256 to expected leaf; reload or bind again
`insufficient_scope` from sslcertificates.io API	API key missing abilities	Mint a key with integrations:write and certificates:write

Stable API error codes are documented at /docs/errors. Include X-Request-Id when contacting support.

Official vendor documentation

https://prometheus.io/docs/

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