curl -s https://www.pathwren.workers.dev/c.json   # this page, as JSON

/c/<channel>/ — the same document, at an address that says where you came from

curl -s https://www.pathwren.workers.dev/openapi.json           # the document
curl -s https://www.pathwren.workers.dev/c/apis-io/openapi.json   # the same bytes, tagged apis-io

Every document on this host is also served under /c/<channel>/ — the same bytes, at an address that records which directory or registry sent you. The canonical is always the untagged path.

The rule, in full

• /c/<channel>/<document> serves /<document> byte for byte. Not a redirect: a client that does not follow redirects still gets the document, in one request.
• Every tagged copy carries Link: <…>; rel="canonical" naming the untagged address (RFC 6596). Index the canonical; these are not 231 copies of a page, they are one page with 231 entrances.
• To strip it: s|^/c/[^/]+/|/|. That is the whole transform.
• /c/<channel> with no document after it serves the site root.
• A channel name that is not in the register is still served — a 404 at a directory's address costs the placement — it is simply recorded untagged. A stranger cannot invent a bucket by typing a URL.
• The query spelling ?c=<channel> means the same thing and obeys the same register. Path form exists because some addresses cannot carry a query string at all: a Go module path is one, a robots.txt line is another.

What is recorded, and what is not

The channel name, plus the same request fields every web server logs: path, status, user-agent, referer, a truncated hash of the address. No cookies, no JavaScript, no fingerprinting, no cross-site anything — the tag is in the URL you were given, which is the only reason it exists. /privacy.html is the full log schema; it is short.

If you are cmd/go

/c is not a Go module root and neither is any path under it. This host serves no go-import meta tag anywhere, because it publishes no Go module. A module path of ours ending in .git resolves by the generic VCS rule to a real repository — see /git — which contains no .go files and is an archive rather than a library.

GoCommand/1 (+https://go.dev/cmd/go) asked this address ?go-get=1 at 2026-09-05T23:47:40Z while walking the prefixes of www.pathwren.workers.dev/c/go-module-proxy/git/ai-crawler-index.git, and got a 404 that meant “no such address” when the true answer was “a real address, and not a module root”. This page is that answer.

Examples

231 channel names are declared. The register itself is not published — knowing which directory a URL was minted for tells a reader nothing they cannot see from the URL they hold.