Load Checkpoint (With Config - Online)

Load Checkpoint (With Config - Online) is the pack's advanced variant of its checkpoint loader, and "advanced" here means one thing: it loads a checkpoint with an explicit config file instead of letting ComfyUI guess the architecture from the weights.

In stock ComfyUI terms, this is the difference between CheckpointLoaderSimple (guess the config from the file, works for 99% of models) and the older CheckpointLoader (you hand it a v1-inference.yaml-style config that describes the model's architecture). The "With Config" name is the giveaway - this is the pack's version of the explicit-config path, and it's filed under DoubTech/Loaders/Advanced accordingly.

The two inputs

• config_name - the config file, also pulled from DoubTech's online catalog (the configs endpoint).
• ckpt_name - the checkpoint, same list as the pack's simple loader: the 13 SD 1.5/SDXL-era entries (Deliberate v2, DreamShaper v7, SDXL Base/Refiner, etc.).

Outputs are the standard trio: MODEL, CLIP, VAE. Wiring is identical to any checkpoint loader - model to the sampler, CLIP to the text encoder, VAE to the decoder.

The honest state of it

Here's the thing: the config catalog is currently empty. I checked the live API (api.aiart.doubtech.com/comfyui/configs) and it returns an empty list, which means the config_name dropdown has nothing to choose from and the node can't run as-is. It's not your install - the server side just has no configs hosted right now. Like a couple of other entries in this pack, it's a ghost node until DoubTech restocks.

When it does have entries, the only reason to reach for it over the simple loader is a checkpoint whose architecture ComfyUI can't guess correctly - the "wrong config, garbage output" class of problem where an explicit config pins it down. For every normal checkpoint, load_checkpoint_guess_config (what the simple node uses) is the right call and this node is just extra ceremony.

Install

cd ComfyUI/custom_nodes
git clone https://github.com/yolanother/DTAIComfyLoaders

or search "DTAIComfyLoaders" ("Comfy UI Online Loaders") in ComfyUI Manager, then restart. Only dependency is requests.

Where people get burned

• Empty dropdown on config_name. That's the empty catalog, not a bug in your setup. Check https://api.aiart.doubtech.com/comfyui/configs in a browser to confirm the server side.
• First-run downloads. Both the config and the checkpoint download on first use, and the checkpoint is the multi-GB one. No progress bar.
• Dropbox/CivitAI link roulette. Several checkpoint entries are Dropbox links (which can serve HTML to scripted requests) and two - Absolute Reality, DreamShaper v7 - are CivitAI model pages that can't auto-download at all.

My take: skip this node unless you hit a genuine guess-config failure, and even then the simpler path is to download a checkpoint whose config ComfyUI recognizes. The pack's simple loader is the one that earns its keep; this is the corner case nobody asked for, and right now it's an empty corner.