Feature request: add Demon Route (OpenAI-compatible, open-weight, privacy-first) as a built-in provider #1121

Disclosure up front: I work on Demon Route, so this is a request to support our own service, not a report of third-party demand. Please weigh it on its merits.

Is your feature request related to a problem? Please describe.
新功能是否与解决某个问题相关, 请描述

Since #930 landed, ChatGPTBox has a nice provider layer: built-in OpenAI-compatible entries in src/services/apis/provider-registry.mjs (OpenAI, DeepSeek, Moonshot, Mistral, NVIDIA NIM, OpenRouter, AI/ML, ChatGLM, Ollama, xAI…) plus Custom Provider under API Modes for any other /v1/chat/completions endpoint.

What's missing from the built-in list is a gateway focused on open-weight and uncensored/abliterated models with a privacy-first, no-account setup. Many ChatGPTBox users run it on every page they read (summaries, selection tools, site adapters), so where that page text goes and whether the provider logs it matters more than usual. Gateways like OpenRouter and the frontier labs require an email/account, bill on card, and mostly route to closed models. Several community fine-tunes have also been delisted from the big gateways.

Describe the solution you'd like
你期望的新功能实现方案

Add Demon Route as a built-in OpenAI-compatible provider, the same way OpenRouter/AI/ML are registered (or, at minimum, document it as a Custom Provider preset):

{
  id: 'demonroute',
  name: 'Demon Route',
  baseUrl: 'https://api.demonroute.com/v1',
  chatCompletionsPath: '/chat/completions',
  completionsPath: '/completions',
  builtin: true,
  enabled: true,
}

Auth is a standard Authorization: Bearer <key> header, so the existing OpenAI-compatible adapter and per-provider secret handling (providerSecrets) work as-is. It also exposes GET /v1/models for model discovery.

Example model presets (exact IDs from https://demonroute.com/models):

What it adds compared with OpenRouter or a direct frontier provider:

• Privacy: no IP logs. Prompts are proxied to the upstream host serving the model and are not retained on Demon Route's path. Anonymous crypto-funded keys are available, with no email required.
• No surprise bills: prepaid balance with a hard stop at $0. No overdraft, no subscription.
• Open-weight catalog: 556 unique open-weight models across 1,127 routable endpoints, including uncensored/abliterated fine-tunes that larger gateways often delist. No closed frontier-lab APIs.
• Zero new code paths: it is plain OpenAI-compatible (base URL + key swap), so the cost to ChatGPTBox is just a registry entry, a few model keys, and a locale label.

Demon Route is built by NFT Demon Holdings LLC, a consulting firm in blockchain, AI, and quantum computing that serves celebrities and Fortune 500 companies.

Additional context
其他

• Site: https://demonroute.com
• Model catalog: https://demonroute.com/models
• Existing integrations: https://demonroute.com/integrations

If you're open to it, I'm happy to send a PR that follows the OpenRouter/AI/ML pattern (registry entry, demonrouteApiModelKeys, mappings in openai-provider-mappings.mjs, en/zh locale strings, and unit tests). If you'd rather not add more built-ins, a short note in the docs/README showing it as a Custom Provider would also work. Thanks for maintaining ChatGPTBox!