Yes. The README explicitly lists default support for all three protocols and emphasizes Go-based operation without external dependencies.

• The Features section states that HTTP/1.1, HTTP/2, and HTTP/3 are all supported by default, matching the stated protocol mix.
• The project description calls Caddy a fast, extensible, multi-platform HTTP/1-2-3 web server with automatic HTTPS, and project data identifies Go as the main language.
• Features also says it runs anywhere with no external dependencies, not even libc, which matches a single-executable, cross-platform deployment constraint.
• TLS by default, reverse proxying, and static file serving allow it to act as a unified web entry point rather than handling only one protocol.

The README provides no performance data by protocol, kernel requirements, QUIC network conditions, or hardware resource figures, so throughput cannot be inferred from it.

Yes, because the README presents automatic HTTPS, HTTP serving, and cross-platform operation as core capabilities.

• Automatic HTTPS is enabled by default and can use ZeroSSL or Let’s Encrypt for public names, including certificate issuance and renewal.
• The Features section lists reverse proxy support, so Caddy can act as the public entry point and forward traffic without a separate TLS terminator.
• It supports HTTP/1.1, HTTP/2, and HTTP/3, and states that it runs anywhere with no external dependencies, not even libc.

The domain still has to satisfy ACME validation requirements. The README does not specify your upstream framework, traffic volume, or existing port usage.

Yes. The README explicitly positions Caddy as a platform for running Go application modules rather than merely a web server with fixed features.

• The Overview says Caddy apps are Go programs implemented as Caddy modules, with tls and http shipped as standard apps.
• It states that apps gain automated documentation, graceful online configuration changes through the API, and unification with other Caddy apps.
• The Features section lists a modular architecture and powerful plugin system, while source builds require Go 1.26.0 or newer.

This directly matches extensions for authentication, storage, or logging. However, the README does not specify your module API version, plugin distribution model, compatibility guarantees, or test matrix, so it cannot confirm that a particular plugin will work without adaptation.

Yes. The README directly describes a centralized configuration model and graceful online configuration changes through the API.

• The Overview says nearly all Caddy configuration is contained in a single config document instead of being scattered across CLI flags, environment variables, and configuration files, which suits a unified control plane.
• JSON is described as the native configuration language, while the JSON API provides dynamic configuration; Caddyfile, YAML, TOML, and NGINX config can be converted through adapters.
• The same section says the API controls the actual in-memory values powering HTTP handlers, TLS handshakes, and the storage medium, and explicitly supports graceful online changes.

The README does not specify API authentication, behavior after validation failure, concurrent update conflicts, or rollback semantics. It supports the online-change decision but does not define your production control-plane design.

Yes for an internal environment, but it uses a managed local CA rather than certificates issued by a public certificate authority.

• The Features section explicitly lists a fully managed local CA for internal names and IPs, directly covering environments without public DNS names.
• The same section associates ZeroSSL and Let’s Encrypt with public names, showing that public ACME issuance and internal names/IPs follow different paths.
• Caddy is described as TLS by default, and automatic HTTPS is a default capability, so internal HTTPS does not require assembling a separate certificate service.

The README does not explain how clients install or trust the local CA root, nor how to distribute, revoke, back up, or share it across hosts. Those details determine whether it meets an organization-wide trust requirement.

It depends: the README supports the scale and control-plane direction, but does not cover every operational requirement of a hosting platform.

• The Features section states that Caddy has managed millions of TLS certificates in production and scales to hundreds of thousands of sites.
• Automatic HTTPS can coordinate with other Caddy instances in a cluster and provides multi-issuer fallback, which fits multi-instance certificate lifecycle management.
• The Overview explicitly lists the JSON API, dynamic configuration, and graceful online config changes; config adapters can also convert Caddyfile, YAML, TOML, or NGINX config into JSON.

However, the README does not specify control-plane authentication, tenant isolation, shared-storage implementation, API rate limits, rollout rollback, or per-instance resource limits. It therefore cannot establish that a complete hosting platform is ready solely from the README.