diff --git a/docs/src/reference/experimental.md b/docs/src/reference/experimental.md
new file mode 100644
index 000000000..0473e12cb
--- /dev/null
+++ b/docs/src/reference/experimental.md
@@ -0,0 +1,17 @@
+# Experimental APIs
+
+> 🐉 Hic Sunt Dracones
+
+The [`JuliaHub.Experimental`](@ref) module contains various experimental APIs.
+
+```@docs
+JuliaHub.Experimental
+```
+
+## Reference
+
+```@docs
+JuliaHub.Experimental.Registry
+JuliaHub.Experimental.registries
+JuliaHub.Experimental.register_package
+```
diff --git a/src/JuliaHub.jl b/src/JuliaHub.jl
index 13ebb62bb..039f93f87 100644
--- a/src/JuliaHub.jl
+++ b/src/JuliaHub.jl
@@ -22,6 +22,7 @@ const _LOCAL_TZ = Ref{Dates.TimeZone}()
 include("utils.jl")
 include("authentication.jl")
 include("restapi.jl")
+include("experimental.jl")
 include("userinfo.jl")
 include("applications.jl")
 include("batchimages.jl")
@@ -34,6 +35,7 @@ include("jobs/request.jl")
 include("jobs/logging.jl")
 include("jobs/logging-kafka.jl")
 include("jobs/logging-legacy.jl")
+include("packages.jl")
 include("projects.jl")
 
 # JuliaHub.jl follows the convention that all private names are
@@ -42,7 +44,8 @@ function _find_public_names()
     return filter(names(@__MODULE__; all=true)) do s
         # We don't need to check or mark public the main module itself
         (s == :JuliaHub) && return false
-        startswith(string(s), "_") && return false
+        # The Experimental module (or anything within it) is not public.
+        (s == :Experimental) && return false
         # Internal functions and types, prefixed by _
         startswith(string(s), "_") && return false
         # Internal macros, prefixed by _
diff --git a/src/experimental.jl b/src/experimental.jl
new file mode 100644
index 000000000..397c8a08a
--- /dev/null
+++ b/src/experimental.jl
@@ -0,0 +1,40 @@
+"""
+    module Experimental
+
+Home for experimental JuliaHub.jl APIs.
+
+!!! warning "Unstable APIs"
+
+    These APIs are considered highly unstable.
+    Both JuliaHub platform version changes, and also JuliaHub.jl package changes may break these APIs at any time.
+    Depend on them at your own peril.
+"""
+module Experimental
+
+using UUIDs: UUIDs
+
+const _DOCS_EXPERIMENTAL_API = """
+!!! warning "Unstable API"
+    This API is not part of the public API and does not adhere to semantic versioning.
+
+    This APIs is considered highly unstable.
+    Both JuliaHub platform version changes, and also JuliaHub.jl package changes may break it at any time.
+    Depend on it at your own peril.
+"""
+
+"""
+    struct Registry
+
+Represents a Julia package registry on JuliaHub.
+
+$(_DOCS_EXPERIMENTAL_API)
+"""
+struct Registry
+    uuid::UUIDs.UUID
+    name::String
+end
+
+function registries end
+function register_package end
+
+end
diff --git a/src/packages.jl b/src/packages.jl
new file mode 100644
index 000000000..f9d9be66e
--- /dev/null
+++ b/src/packages.jl
@@ -0,0 +1,160 @@
+function _parse_registry(registry_dict::Dict)
+    name, uuid = try
+        registry_dict["name"], tryparse(UUIDs.UUID, registry_dict["uuid"])
+    catch e
+        @error "Invalid registry value in API response" exception = (e, catch_backtrace())
+        return nothing
+    end
+    return Experimental.Registry(uuid, name)
+end
+
+"""
+    JuliaHub.Experimental.registries() -> Vector{Experimental.Registry}
+
+Return the list of registries configured on the JuliaHub instance.
+
+$(Experimental._DOCS_EXPERIMENTAL_API)
+"""
+function Experimental.registries(auth::Authentication)
+    # NOTE: this API endpoint is not considered stable as of now
+    r = _restcall(auth, :GET, ("app", "packages", "registries"), nothing)
+    if r.status != 200 || !r.json["success"]
+        throw(JuliaHubError("Invalid response from JuliaHub (code $(r.status))\n$(r.body)"))
+    end
+    _parse_registry.(r.json["registries"])
+end
+
+"""
+    JuliaHub.Experimental.register_package(
+        auth::Authentication,
+        registry::Union{AbstractString, Registry},
+        repository_url::AbstractString;
+        # Optional keyword arguments:
+        [notes::AbstractString,]
+        [branch::AbstractString,]
+        [subdirectory::AbstractString,]
+        [git_server_type::AbstractString]
+    ) -> String | Nothing
+
+Initiates a registration PR of the package at `repository_url` in
+Returns the URL of the registry PR, or `nothing` if the registration failed.
+
+# Example
+
+```
+using JuliaHub
+auth = JuliaHub.authenticate("juliahub.com")
+JuliaHub._registries(auth)
+
+r = JuliaHub.Experimental.register_package(
+    auth,
+    "MyInternalRegistry",
+    "https://github.com/MyUser/MyPackage.jl";
+    notes = "This was initiated via JuliaHub.jl",
+)
+```
+
+$(Experimental._DOCS_EXPERIMENTAL_API)
+"""
+function Experimental.register_package(
+    auth::Authentication,
+    registry::Union{AbstractString, Experimental.Registry},
+    repository_url::AbstractString;
+    notes::Union{AbstractString, Nothing}=nothing,
+    branch::Union{AbstractString, Nothing}=nothing,
+    subdirectory::AbstractString="",
+    git_server_type::Union{AbstractString, Nothing}=nothing,
+)
+    if !isnothing(branch) && isempty(branch)
+        throw(ArgumentError("branch can not be an empty string"))
+    end
+    git_server_type = if isnothing(git_server_type)
+        if startswith(repository_url, "https://github.com")
+            "github"
+        else
+            throw(
+                ArgumentError(
+                    "Unable to determine git_server_type for repository: $(repository_url)"
+                ),
+            )
+        end
+    else
+        git_server_type
+    end
+    # Interpret the registry argument
+    registry_name::String = if isa(registry, Experimental.Registry)
+        registry.name
+    else
+        String(registry)
+    end
+    # Do the package registration POST request.
+    # NOTE: this API endpoint is not considered stable as of now
+    body = Dict(
+        "requests" => [
+            Dict(
+                "registry_name" => registry_name,
+                "repo_url" => repository_url,
+                "branch" => something(branch, ""),
+                "notes" => something(notes, ""),
+                "subdir" => subdirectory,
+                "git_server_type" => git_server_type,
+            ),
+        ],
+    )
+    r = _restcall(
+        auth,
+        :POST,
+        ("app", "registrator", "register"),
+        JSON.json(body);
+        headers=["Content-Type" => "application/json"],
+    )
+    if r.status != 200
+        throw(JuliaHubError("Invalid response from JuliaHub (code $(r.status))\n$(r.body)"))
+    elseif !r.json["success"]
+        error_message = get(get(r.json, "message", Dict()), "error", nothing)
+        if isnothing(error_message)
+            throw(JuliaHubError("Invalid response from JuliaHub (code $(r.status))\n$(r.body)"))
+        end
+        throw(InvalidRequestError(error_message))
+    end
+    id, message = r.json["id"], r.json["message"]
+    @info "Initiated registration in $(registry_name)" id message repository_url
+    sleep(1) # registration won't go through right away anyway
+    status = _registration_status(auth, id)
+    δt = 2
+    while status.state == "pending"
+        sleep(δt)
+        δt = min(δt * 2, 10) # double the sleep time, to a max of 10s
+        status = _registration_status(auth, id)
+        if status.state == "pending"
+            @info ".. waiting for registration to succeed" status.message
+        end
+    end
+    if status.state != "success"
+        @error "Registration failed ($id)" status.state status.message
+        return nothing
+    end
+    return status.message
+end
+
+struct _RegistrationStatus
+    state::String
+    message::String
+end
+
+function _registration_status(auth::Authentication, id::AbstractString)
+    # NOTE: this API endpoint is not considered stable as of now
+    r = _restcall(
+        auth,
+        :POST,
+        ("app", "registrator", "status"),
+        JSON.json(Dict(
+            "id" => id
+        ));
+        headers=["Content-Type" => "application/json"],
+    )
+    if r.status != 200 || !r.json["success"]
+        throw(JuliaHubError("Invalid response from JuliaHub (code $(r.status))\n$(r.body)"))
+    end
+    return _RegistrationStatus(r.json["state"], r.json["message"])
+end