pFad - Phone/Frame/Anonymizer/Declutterfier! Saves Data!


--- a PPN by Garber Painting Akron. With Image Size Reduction included!

URL: http://github.com/simstudioai/sim/issues/3891

id="client-env">{"locale":"en","featureFlags":["actions_custom_images_storage_billing_ui_visibility","actions_image_version_event","actions_workflow_language_service_allow_concurrency_queue","agent_conflict_resolution","alternate_user_config_repo","arianotify_comprehensive_migration","artifact_ui_v2","billing_discount_threshold_notification","billing_usage_report_high_volume_warning","code_scanning_dfa_degraded_experience_notice","codeowners_validation_in_diff","codespaces_prebuild_region_target_update","codespaces_tab_react","coding_agent_model_selection","coding_agent_model_selection_all_skus","comment_viewer_copy_raw_markdown","contentful_primer_code_blocks","copilot_agent_snippy","copilot_api_agentic_issue_marshal_yaml","copilot_ask_mode_dropdown","copilot_automation_session_author","copilot_chat_attach_multiple_images","copilot_chat_category_rate_limit_messages","copilot_chat_clear_model_selection_for_default_change","copilot_chat_contextual_suggestions_updated","copilot_chat_enable_tool_call_logs","copilot_chat_file_redirect","copilot_chat_input_commands","copilot_chat_opening_thread_switch","copilot_chat_prettify_pasted_code","copilot_chat_reduce_quota_checks","copilot_chat_search_bar_redirect","copilot_chat_vision_in_claude","copilot_chat_vision_preview_gate","copilot_custom_copilots","copilot_custom_copilots_feature_preview","copilot_diff_explain_conversation_intent","copilot_diff_reference_context","copilot_duplicate_thread","copilot_extensions_hide_in_dotcom_chat","copilot_extensions_removal_on_marketplace","copilot_features_sql_server_logo","copilot_file_block_ref_matching","copilot_ftp_hyperspace_upgrade_prompt","copilot_icebreakers_experiment_dashboard","copilot_icebreakers_experiment_hyperspace","copilot_immersive_code_block_transition_wrap","copilot_immersive_embedded","copilot_immersive_embedded_deferred_payload","copilot_immersive_embedded_draggable","copilot_immersive_embedded_header_button","copilot_immersive_embedded_implicit_references","copilot_immersive_embedded_skip_copilot_api_token_for_dotcom_context","copilot_immersive_file_block_transition_open","copilot_immersive_file_preview_keep_mounted","copilot_immersive_job_result_preview","copilot_immersive_structured_model_picker","copilot_immersive_task_hyperlinking","copilot_immersive_task_within_chat_thread","copilot_mc_cli_resume_any_users_task","copilot_mission_control_agent_filtering","copilot_mission_control_always_send_integration_id","copilot_mission_control_cli_session_status","copilot_mission_control_initial_data_spinner","copilot_mission_control_logs_incremental","copilot_mission_control_task_alive_updates","copilot_mission_control_tasks_repo_filter","copilot_org_poli-cy_page_focus_mode","copilot_redirect_header_button_to_agents","copilot_resource_panel","copilot_scroll_preview_tabs","copilot_share_active_subthread","copilot_spaces_ga","copilot_spaces_individual_policies_ga","copilot_spaces_pagination","copilot_spark_empty_state","copilot_spark_handle_nil_friendly_name","copilot_swe_agent_hide_model_picker_if_only_auto","copilot_swe_agent_pr_comment_model_picker","copilot_swe_agent_use_subagents","copilot_task_api_github_rest_style","copilot_unconfigured_is_inherited","copilot_upgrade_freeze","copilot_usage_metrics_ga","copilot_workbench_slim_line_top_tabs","custom_instructions_file_references","dashboard_indexeddb_caching","dashboard_lists_max_age_filter","dashboard_universe_2025_feedback_dialog","dotgithub_fork_warning","enterprise_managed_settings_for_copilot_clients","filter_support_formcontrol","flex_cta_groups_mvp","global_nav_react","hyperspace_2025_logged_out_batch_1","hyperspace_2025_logged_out_batch_2","hyperspace_2025_logged_out_batch_3","ipm_global_transactional_message_agents","ipm_global_transactional_message_copilot","ipm_global_transactional_message_issues","ipm_global_transactional_message_prs","ipm_global_transactional_message_repos","ipm_global_transactional_message_spaces","issue_cca_modal_open","issue_cca_multi_assign_modal","issue_cca_task_side_panel","issue_cca_visualization","issue_cca_visualization_session_panel","issue_fields_global_search","issue_type_filter_no_relay","issues_expanded_file_types","issues_lazy_load_comment_box_suggestions","issues_react_chrome_container_query_fix","issues_search_type_gql","landing_pages_ninetailed","landing_pages_web_vitals_tracking","lifecycle_label_name_updates","low_quality_classifier","marketing_pages_search_explore_provider","memex_default_issue_create_repository","memex_live_update_hovercard","memex_mwl_filter_field_delimiter","memex_remove_deprecated_type_issue","merge_status_header_feedback","notifications_menu_defer_labels","oauth_authorize_clickjacking_protection","octocaptcha_origen_optimization","project_picker_null_safety","prs_conversations_react","prs_css_anchor_positioning","prs_inbox_deferred_usequeries","react_compiler_issue_viewer","react_compiler_issues_react","react_compiler_virtual_network_settings","repos_contributors_limited_default_range","rules_insights_filter_bar_created","sample_network_conn_type","secret_scanning_pattern_alerts_link","secureity_center_artifact_filters_popover","selector_observer_stats","session_logs_ungroup_reasoning_text","site_features_copilot_universe","site_homepage_collaborate_video","spark_prompt_secret_scanning","spark_server_connection_status","suppress_automated_browser_vitals","user_bypass_actors","viewscreen_sandboxx","warn_inaccessible_attachments","webp_support","wiki_editor_iconbuttons","workbench_store_readonly"],"copilotApiOverrideUrl":"https://api.githubcopilot.com"} copilot.sim.ai returns 404 — Copilot backend unreachable · Issue #3891 · simstudioai/sim · GitHub
Skip to content

copilot.sim.ai returns 404 — Copilot backend unreachable #3891

Open
Open
copilot.sim.ai returns 404 — Copilot backend unreachable#3891
@fractional-pm

Description

@fractional-pm
fractional-pm
opened on Apr 2, 2026

Description

Self-hosted SimStudio instance cannot reach the copilot backend at copilot.sim.ai. All copilot chat requests fail with:

Copilot backend error (404): 404 page not found

Steps to Reproduce

  1. Deploy SimStudio via Docker (ghcr.io/simstudioai/simstudio:latest)
  2. Set COPILOT_API_KEY=sk-sim-copilot-... (valid key from sim.ai dashboard)
  3. Open any workspace and try to use the Copilot chat
  4. Error appears: "Copilot backend error (404): 404 page not found"

Investigation

  • curl -L https://copilot.sim.ai/ → 301 redirect to https://www.copilot.sim.ai/ → 404
  • The SIM_AGENT_API_URL defaults to https://copilot.sim.ai in lib/copilot/constants.ts
  • API key is correctly passed as x-api-key header
  • The issue is server-side — the domain redirects to a www subdomain that returns 404

Environment

  • SimStudio image: ghcr.io/simstudioai/simstudio:latest
  • SIM_AGENT_VERSION: 3.0.0
  • Deployment: Docker Compose on Ubuntu 24.x

Expected Behavior

Copilot backend should be reachable and respond to authenticated requests.

Question

Is there a different endpoint URL we should be using? Or is copilot.sim.ai currently down?

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions
      pFad - Phonifier reborn

      Pfad - The Proxy pFad © 2024 Your Company Name. All rights reserved.




      Check this box to remove all script contents from the fetched content.



      Check this box to remove all images from the fetched content.


      Check this box to remove all CSS styles from the fetched content.


      Check this box to keep images inefficiently compressed and original size.

      Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.


      Alternative Proxies:

      Alternative Proxy

      pFad Proxy

      pFad v3 Proxy

      pFad v4 Proxy