GoModel & Claude Code

GoModel can sit in front of Claude Code so every request goes through your own gateway first. Flow: Claude Code -> GoModel -> Anthropic

Before you start

Install Claude Code on your machine.
Choose a GoModel master key, for example change-me.
Make sure GoModel has an Anthropic upstream credential.

Claude Code can be routed through GoModel whether or not you personally use a Claude Code subscription. For gateway mode, Claude Code talks to GoModel with ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN. GoModel still needs its own ANTHROPIC_API_KEY to reach Anthropic upstream — either a Console API key or a Claude subscription OAuth token.

How to get `ANTHROPIC_API_KEY`

Option A — Console API key (pay-as-you-go):

Open the Claude Console and sign in to your API account.
Go to account settings in Console, then create an API key.
Copy the key once and set it for GoModel as ANTHROPIC_API_KEY.

Anthropic’s API docs state that API keys are created in Console account settings.

Claude paid plans (Pro, Max, Team, Enterprise) and Claude API Console billing are separate. API key usage is billed as API usage.

Option B — Claude subscription token (Pro, Max, Team, or Enterprise):

Run claude setup-token on a machine where Claude Code is logged in to your subscription.
Copy the generated sk-ant-oat01-... token and set it for GoModel as ANTHROPIC_API_KEY.

GoModel detects the sk-ant-oat prefix and authenticates upstream with the OAuth Bearer scheme automatically. Usage is covered by your subscription’s limits instead of API billing.

Anthropic authorizes subscription tokens only for Claude Code traffic. This setup works because Claude Code remains the client and GoModel relays its requests unchanged; pointing other clients or tools at the same gateway credential is rejected upstream and is against Anthropic’s terms of service.

1. Run GoModel

Start GoModel with a master key and an Anthropic provider key:

docker run --rm -p 8080:8080 \
  -e GOMODEL_MASTER_KEY="change-me" \
  -e ANTHROPIC_API_KEY="sk-ant-..." \
  enterpilot/gomodel

2. Confirm Anthropic passthrough

Check that the Anthropic passthrough models endpoint responds:

curl -s http://localhost:8080/p/anthropic/v1/models \
  -H "Authorization: Bearer change-me"

import anthropic

client = anthropic.Anthropic(
    base_url="http://localhost:8080/p/anthropic",
    api_key="change-me",
)

for model in client.models.list():
    print(model.id)

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  baseURL: "http://localhost:8080/p/anthropic",
  apiKey: "change-me",
});

for await (const model of client.models.list()) {
  console.log(model.id);
}

Then send one small test message:

curl -s http://localhost:8080/p/anthropic/v1/messages \
  -H "Authorization: Bearer change-me" \
  -H "Content-Type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "claude-3-haiku-20240307",
    "max_tokens": 16,
    "messages": [
      {
        "role": "user",
        "content": "Reply with exactly ok"
      }
    ]
  }'

import anthropic

client = anthropic.Anthropic(
    base_url="http://localhost:8080/p/anthropic",
    api_key="change-me",
)

message = client.messages.create(
    model="claude-3-haiku-20240307",
    max_tokens=16,
    messages=[{"role": "user", "content": "Reply with exactly ok"}],
)

print(message.content[0].text)

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  baseURL: "http://localhost:8080/p/anthropic",
  apiKey: "change-me",
});

const message = await client.messages.create({
  model: "claude-3-haiku-20240307",
  max_tokens: 16,
  messages: [{ role: "user", content: "Reply with exactly ok" }],
});

console.log(message.content[0].text);

If the gateway is wired correctly, the response will contain ok.

3. Configure Claude Code to use GoModel

Point Claude Code at GoModel:

export ANTHROPIC_BASE_URL=http://localhost:8080
export ANTHROPIC_AUTH_TOKEN=change-me
export CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1

The managed base URL serves /v1/messages with native forwarding: requests that resolve to Anthropic are relayed unchanged apart from model alias resolution (preserving cache_control, thinking signatures, and beta headers) while rate limits, budgets, audit, and usage tracking apply — and model aliases or virtual models can route Claude Code to other providers. Alternatively, ANTHROPIC_BASE_URL=http://localhost:8080/p/anthropic uses raw passthrough pinned to the Anthropic upstream. Short Claude Code doc summary: for gateway mode, set ANTHROPIC_BASE_URL to your gateway URL and ANTHROPIC_AUTH_TOKEN to your gateway token, then run Claude Code normally. See the official guide: Claude Code LLM gateway docs. If GoModel is not running on your local machine, replace localhost:8080 with the correct host and port.

4. Run a Claude Code test prompt

claude -p --output-format text --model claude-3-haiku-20240307 \
  'Reply with exactly ok and no punctuation.'

The validated result was:

ok

5. Check the traffic in GoModel

Open the GoModel dashboard audit logs: http://localhost:8080/admin/dashboard/audit This is the easiest place to confirm that Claude Code is reaching GoModel and to inspect the full request and response trail. From the same dashboard, you can keep following your GoModel traffic and usage.

References

Anthropic Claude Code gateway docs: LLM gateway
Anthropic Claude Code settings: Settings
Claude Help: Managing API key environment variables in Claude Code
Claude Help: Paid Claude plans vs API Console billing
Claude API docs: API overview (keys from Console account settings)

Validated on March 10, 2026

This guide was validated against:

a local GoModel instance on http://localhost:8080
a GoModel branch exposing /p/{provider}/v1/...
Claude Code 2.1.72

Local validation confirmed:

GET /p/anthropic/v1/models returned 200 OK
POST /p/anthropic/v1/messages returned 200 OK
claude returned ok when pointed at GoModel

​Before you start

​How to get ANTHROPIC_API_KEY

​1. Run GoModel

​2. Confirm Anthropic passthrough

​3. Configure Claude Code to use GoModel

​4. Run a Claude Code test prompt

​5. Check the traffic in GoModel

​References

​Validated on March 10, 2026

Before you start

How to get `ANTHROPIC_API_KEY`

1. Run GoModel

2. Confirm Anthropic passthrough

3. Configure Claude Code to use GoModel

4. Run a Claude Code test prompt

5. Check the traffic in GoModel

References

Validated on March 10, 2026