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LobeChat with TopxAI: the OpenAI proxy address

2026-10-24

Set OpenAI’s API proxy address to https://ai.topxea.com/v1 in LobeChat, or OPENAI_PROXY_URL for a deployment, and fetch the model list.

LobeChat's OpenAI provider accepts a proxy address, which is all TopxAI needs. The Anthropic provider takes one too, for Claude on the Messages API.

In the app

Settings → AI Service Provider → OpenAI.
API Key: a TopxAI key. API Proxy Address: https://ai.topxea.com/v1.
Click Get model list; the models your key can call appear. Enable the ones you want.
Check sends one request and shows the reply.

For Claude on the Anthropic provider: API key the same, proxy address https://ai.topxea.com (no /v1), models claude-sonnet-5-5 and claude-opus-5-5.

Self-hosted, with variables

OPENAI_API_KEY=sk-...
OPENAI_PROXY_URL=https://ai.topxea.com/v1
OPENAI_MODEL_LIST=-all,+claude-sonnet-5-5,+gpt-6.1-sol,+grok-4.7,+kimi-k3.1-pro
ANTHROPIC_API_KEY=sk-...
ANTHROPIC_PROXY_URL=https://ai.topxea.com

OPENAI_MODEL_LIST starts with -all to drop LobeChat's built-in OpenAI names, then adds the catalogue ids; without it the picker shows models TopxAI does not sell and every one of them returns 403.

Images

LobeChat's image generation with the OpenAI provider works with gpt-image-2.5-sunburst and gpt-image-2.5-flare through the same proxy address.

If it fails

401: the key is wrong or was pasted with a space. 402: the balance is empty. 403: the model id is not sold here or is not on this key's route. See Common error responses.
The model works in curl but not in the tool: that page lists the usual causes, one per tool.

Models: claude-sonnet-5-5, claude-opus-5-5 · Models & pricing

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LobeChat with TopxAI: the OpenAI proxy address

In the app

Self-hosted, with variables

Images

If it fails

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