GitHub

Hosting

Use our free hosted service or run your own instance with no limits

Hosted Service Limits

Fair usage limits for the free hosted service at ws.certstream.dev

1000
Requests / second
2000
Burst capacity
20
Connections / IP
10K
Max concurrent users

Choose Your Option

Both options are completely free and open source

Hosted Service

Free
  • Rate limits apply (see above)
  • No setup required
  • Always up-to-date
  • WebSocket: wss://ws.certstream.dev
  • SSE: https://ws.certstream.dev/sse
  • Ideal for testing & light usage
Try Live Demo
Recommended

Self-Hosted

Unlimited
  • No rate limits
  • Full control over configuration
  • Custom authentication
  • State persistence
  • Production-ready performance
Self-Host Guide

Self-Hosting Benefits

Why you might want to run your own instance

No Rate Limits

Process unlimited certificates without throttling. Essential for large-scale security monitoring and research projects.

Custom Authentication

Protect your instance with bearer token authentication. Multiple tokens supported for team access control.

State Persistence

Resume from last position after restart. Never miss certificates during maintenance or updates.

Prometheus Metrics

Monitor your instance with built-in metrics. Track connections, throughput, and CT log health.

Hot Reload Config

Update configuration without restart. Zero-downtime changes to authentication and limits.

Quick Start

Run your own instance in seconds

Docker One command 
docker run -d -p 8080:8080 reloading01/certstream-server-rust:latest

That's it! Your instance is now running at ws://localhost:8080/