The one idea: base URL + key + model
Every tool that talks to an AI model needs three settings. Once you understand these three, every tool is the same.
The gateway speaks two dialects of the same language: the OpenAI dialect and the Anthropic dialect. Your tool speaks one of them. Both reach the same models behind the same door.
OpenAI-compatible tools
Use this for opencode, aider, Codex, Cursor, Open Design, and any tool that asks for an “OpenAI base URL”.1
Set the base URL
https://api.hjc925.cloud/v12
Set the API key
Paste your own key. Do not share keys.
3
Set the model
Use a model name from the list below.
Anthropic tools
Use this for Claude Code and other tools that speak the Anthropic protocol.If Claude Code is already logged into your own Anthropic subscription, you can keep using that login directly — it is not metered by the gateway. Use a gateway key when you want one key across tools or when someone needs access without their own subscription. See Connect a CLI for the full comparison.
Model names: full names and wildcards
Give the full name of the model you want:How wildcards change things
Two routes on the gateway are wildcards:chatgpt/* and anthropic/*. A
wildcard means “any model under this provider that is not listed exactly”, so a
new model from either of those two works without anyone registering it first:
openrouter/* or gemini/* wildcard. Models under those
prefixes work only when they are registered by name — gemini/gemini-3.8-flash
and the four openrouter/… entries are, and anything else under those prefixes
is refused with no healthy deployments for this model.
If a model name starts with openrouter/, the gateway sends it through OpenRouter. You do not need anyone to add the exact model first.
Why names look “doubled”
A name likeminimax/MiniMax-M3 has two parts. The part before the slash is the provider (who serves it). The part after is the model. The gateway uses both to decide the real route.
Not every name has a prefix. deepseek-v4.1-flash and qwen3.8-max are public names with no provider in front of them, and the gateway matches the whole string — so a prefix you add yourself makes it a different name and it will not be found.
When a model is registered twice under the same full name — a pool — the gateway spreads your requests across both routes automatically. You do nothing; you just use the name.
How to find what models exist
Ask the gateway itself. This returns the list of models your key may call:401.
Test your key
Run this in a terminal. It sends one short request.What your key can and cannot do
Your key makes model requests. That is all.
If a request fails with a budget error, your key has hit its limit. Ask Herman to raise it. That is a normal conversation, not a fault.
Tools, MCP and skills
Some agents can use extra tools. The gateway can attach MCP servers (remote tools like context7, which fetches current library documentation) and skills (stored instructions). If your agent supports MCP, you can point it at the gateway to discover what tools are available. What you see depends on what Herman has allowed your key to reach.1
Connect your agent
Point it at the gateway with your key, as shown above.
2
Look for tools
The agent lists the MCP tools it can use. Approve only what your task needs.
3
Ask Herman for more
If a tool you need is not listed, the key’s access may not include it. Ask Herman.
The other address
The gateway has a second address:https://llm.hjc925.cloud. This is the gateway site: the front page, the API reference, and the dashboard.
Your key works on both addresses. The dashboard at https://llm.hjc925.cloud/ui is where you sign in to see your key’s usage and limits. The management pages there are for the admin.
Checking a pooled model is healthy
If a public name is served by more than one upstream, a failure is rarely total — it is usually one member of the pool refusing while the others carry on. That makes it look intermittent from the client side. Companion -> Pool status shows which members are answering, what weight each carries, and where traffic is actually going. Loading it costs nothing; the Check now button runs a live check against every member.Weights are set on the same Companion door, not in the tool you call the gateway
from. Nothing in your client configuration changes when a pool member is held out —
the public name and your key stay the same, which is the point of the pool.
More
- How to connect a CLI — the deeper CLI guide, including the one case where Claude Code should use the gateway
- The pages under For the admin (Models, pools and fallbacks, Monitor usage and keys, MCP servers and skills) explain how the gateway works behind the scenes.