SSLMate/certspotter
Lightweight Certificate Transparency Log Monitor observed · 2026-08-28
Health v2 · maintenance only
75/100
- Activity 95
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 3688
- days_rel: n/a
- days_push: 35
- n_releases_24m: 0
Adoption not part of the score
1169 stars · 102 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Cert Spotter is an open-source Certificate Transparency log monitor written in Go that alerts you when SSL/TLS certificates are issued for your domains. It runs as a lightweight daemon without requiring a database, using a robust certificate parser to avoid missing certificates.
Use cases
- detect unauthorized ssl certificates issued for my domain
- monitor certificate transparency logs for subdomain takeover
- get alerted when a certificate is issued for my domain
- detect compromised certificate authority impersonating my site
- audit certificates issued outside corporate policy
- monitor ct logs without running a database
When to choose
- you need continuous CT log monitoring for your domains with email or script alerts
- you want a lightweight monitor that requires no database
- you need to detect DNS compromise, CA compromise, or subdomain takeover via certificate issuance
- you want a self-hosted alternative to hosted CT monitoring services
When to avoid
- you need certificate expiration and installation health checks - those are only in the paid hosted service
- you want a web dashboard or Slack notifications out of the box
- you only need one-off certificate searches rather than continuous monitoring
Facets
cli-tool · maturity active
security monitoring alerting parser cli security developer-tools networking windows go cli cross-platform certificate-transparency pki x509 tls ssl-certificates certificate-monitoring subdomain-takeover webpki command-line linux macos
9 sources
- readme: https://github.com/SSLMate/certspotter · fetched 2026-08-28 · d8d072e08abb
- homepage: https://sslmate.com/certspotter · fetched 2026-08-29 · a2a33897d472
- site_page: https://sslmate.com/about · fetched 2026-08-29 · 85889988968f
- site_page: https://sslmate.com/pricing · fetched 2026-08-29 · f6cc7c6717b4
- site_page: https://sslmate.com/pricing/certificates · fetched 2026-08-29 · 58aadac1b106
- site_page: https://sslmate.com/pricing/certspotter · fetched 2026-08-29 · 715cb5e51aed
- site_page: https://sslmate.com/pricing/ct_search_api · fetched 2026-08-29 · 91bfe3cb6e35
- site_page: https://sslmate.com/help · fetched 2026-08-29 · 6d5bc781cd67
- site_page: https://sslmate.com/help/faq · fetched 2026-08-29 · 06826caa6624
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| SSLMate/certspotter | main | 75 |
For agents
markdown · JSON · MCP: product_card(name="SSLMate/certspotter")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem