instant-acme is an async, pure-Rust ACME (RFC 8555) client.
instant-acme is used in production at Instant Domains to help us provision TLS certificates within seconds for our customers. instant-acme relies on Tokio and rustls to implement the RFC 8555 specification.
- Store/recover your account credentials by serializing/deserializing
- Fully async implementation with tracing support
- Support for processing multiple orders concurrently
- Support for external account binding
- Support for certificate revocation
- Uses hyper with rustls and Tokio for HTTP requests
- Uses ring for ECDSA signing
- Minimum supported Rust version: 1.63
- Only tested with DNS challenges against Let's Encrypt (staging and production) and ZeroSSL (production) so far
- Only supports ECDSA keys for now
See the examples directory for an example of how to use instant-acme.