Is there an existing issue for this?

• I have searched the existing issues and checked the recent builds/commits

What would your feature do ?

I would like to be able to get a list of the available checkpoints from the API, and then change the current checkpoint also from the API in a simple and clear way more inline with the new /sdapi/v1/txt2img and /sdapi/v1/img2img APIs.

Currently this is possible by copying the same request the interface does (using /api/predict/) but the parameters to provide are not simple or clear.

This is an example:

{"data":[{"value":"sd-v1-5.ckpt [81761151]","__type__":"update"},"{\"samples_save\": false, \"samples_format\": \"png\", \"samples_filename_pattern\": \"\", \"save_images_add_number\": true, \"grid_save\": false, \"grid_format\": \"png\", \"grid_extended_filename\": false, \"grid_only_if_multiple\": false, \"grid_prevent_empty_spots\": false, \"n_rows\": -1, \"enable_pnginfo\": true, \"save_txt\": true, \"save_images_before_face_restoration\": true, \"jpeg_quality\": 80, \"export_for_4chan\": false, \"use_original_name_batch\": false, \"save_selected_only\": true, \"do_not_add_watermark\": true, \"outdir_samples\": \"outputs/\", \"outdir_txt2img_samples\": \"outputs/txt2img-images\", \"outdir_img2img_samples\": \"outputs/img2img-images\", \"outdir_extras_samples\": \"outputs/extras-images\", \"outdir_grids\": \"\", \"outdir_txt2img_grids\": \"outputs/txt2img-grids\", \"outdir_img2img_grids\": \"outputs/img2img-grids\", \"outdir_save\": \"outputs/\", \"save_to_dirs\": false, \"grid_save_to_dirs\": false, \"use_save_to_dirs_for_ui\": false, \"directories_filename_pattern\": \"\", \"directories_max_prompt_words\": 8, \"ESRGAN_tile\": 192, \"ESRGAN_tile_overlap\": 8, \"realesrgan_enabled_models\": [\"R-ESRGAN x4+\", \"R-ESRGAN x4+ Anime6B\"], \"SWIN_tile\": 192, \"SWIN_tile_overlap\": 8, \"ldsr_steps\": 100, \"upscaler_for_img2img\": null, \"use_scale_latent_for_hires_fix\": false, \"face_restoration_model\": \"CodeFormer\", \"code_former_weight\": 0.5, \"face_restoration_unload\": false, \"memmon_poll_rate\": 8, \"samples_log_stdout\": false, \"multiple_tqdm\": true, \"unload_models_when_training\": false, \"dataset_filename_word_regex\": \"\", \"dataset_filename_join_string\": \" \", \"training_image_repeats_per_epoch\": 1, \"training_write_csv_every\": 500.0, \"sd_model_checkpoint\": \"sd-v1-5.ckpt [81761151]\", \"sd_checkpoint_cache\": 0, \"sd_hypernetwork\": \"None\", \"sd_hypernetwork_strength\": 1, \"img2img_color_correction\": false, \"save_images_before_color_correction\": false, \"img2img_fix_steps\": false, \"enable_quantization\": false, \"enable_emphasis\": true, \"use_old_emphasis_implementation\": false, \"enable_batch_seeds\": true, \"comma_padding_backtrack\": 20, \"filter_nsfw\": false, \"CLIP_stop_at_last_layers\": 1, \"random_artist_categories\": [], \"interrogate_keep_models_in_memory\": false, \"interrogate_use_builtin_artists\": true, \"interrogate_return_ranks\": false, \"interrogate_clip_num_beams\": 1, \"interrogate_clip_min_length\": 24, \"interrogate_clip_max_length\": 48, \"interrogate_clip_dict_limit\": 1500.0, \"interrogate_deepbooru_score_threshold\": 0.5, \"deepbooru_sort_alpha\": true, \"deepbooru_use_spaces\": false, \"deepbooru_escape\": true, \"show_progressbar\": true, \"show_progress_every_n_steps\": 10, \"show_progress_grid\": true, \"return_grid\": true, \"do_not_show_images\": false, \"add_model_hash_to_info\": true, \"add_model_name_to_info\": false, \"disable_weights_auto_swap\": false, \"font\": \"\", \"js_modal_lightbox\": true, \"js_modal_lightbox_initially_zoomed\": true, \"show_progress_in_title\": true, \"quicksettings\": \"sd_model_checkpoint\", \"localization\": \"None\", \"hide_samplers\": [], \"eta_ddim\": 0, \"eta_ancestral\": 1, \"ddim_discretize\": \"uniform\", \"s_churn\": 0, \"s_tmin\": 0, \"s_noise\": 1, \"eta_noise_seed_delta\": 0}"],"is_generating":false,"duration":0.003006458282470703,"average_duration":0.003006458282470703}

Proposed workflow

1. Use the GET method /sdapi/v1/availablecheckpoints to get the list of available checkpoints
2. Use the POST method /sdapi/v1/checkpoint to set the current checkpoint

Additional information

No response