Connect your TKBK key to
Claude Code, Codex, Cursor and Cline.

1. 1
   Install it: npm install -g @anthropic-ai/claude-code
2. 2
   Set the base URL and your key, in the environment (below) or in settings.json.
3. 3
   Open your project folder and run claude.

export ANTHROPIC_BASE_URL="https://api.tkbk.online"
export ANTHROPIC_AUTH_TOKEN="cr_YOUR_KEY"
# optional: keeps the /effort slider, which Claude Code hides behind a custom base URL
export CLAUDE_CODE_ALWAYS_ENABLE_EFFORT=1

claude

[Environment]::SetEnvironmentVariable("ANTHROPIC_BASE_URL", "https://api.tkbk.online", "User")
[Environment]::SetEnvironmentVariable("ANTHROPIC_AUTH_TOKEN", "cr_YOUR_KEY", "User")
[Environment]::SetEnvironmentVariable("CLAUDE_CODE_ALWAYS_ENABLE_EFFORT", "1", "User")
# open a new terminal window, then:
claude

Prefer a file? Put the same values in ~/.claude/settings.json (on Windows: %USERPROFILE%\.claude\settings.json). Claude Code reads its env block on every start.

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.tkbk.online",
    "ANTHROPIC_AUTH_TOKEN": "cr_YOUR_KEY",
    "CLAUDE_CODE_ALWAYS_ENABLE_EFFORT": "1"
  },
  "model": "claude-sonnet-5"
}

Set ANTHROPIC_AUTH_TOKEN only, and do not define ANTHROPIC_API_KEY at the same time. No Anthropic account or login is needed: usage is billed per token from your key’s balance.

Start with claude-sonnet-5; switch to claude-opus-5-5 or claude-fable-5-1 with /model for harder problems.

1. 1
   Install it: npm install -g @openai/codex
2. 2
   Use option A for a quick try or option B for a permanent setup. One of them is enough.
3. 3
   Open your project folder and run codex.

export OPENAI_BASE_URL="https://api.tkbk.online/openai/v1"
export OPENAI_API_KEY="cr_YOUR_KEY"

codex

On Windows set the same two variables with [Environment]::SetEnvironmentVariable, as in the Claude Code example above, and open a new terminal.

model = "gpt-5.6-sol"
model_provider = "tkbk"

[model_providers.tkbk]
name = "TKBK"
base_url = "https://api.tkbk.online/openai/v1"
env_key = "OPENAI_API_KEY"
wire_api = "responses"
requires_openai_auth = false

export OPENAI_API_KEY="cr_YOUR_KEY"

codex

Codex reads the key from OPENAI_API_KEY, which is what env_key points to. The default model is gpt-5.6-sol; gpt-6.1-sol works too. A model_not_found error means a typo in the model id.

1. 1
   Open Settings → Models.
2. 2
   Turn on Override OpenAI Base URL and paste the address below.
3. 3
   Paste your key into OpenAI API Key, then press Verify.
4. 4
   Add the model gpt-5.6-sol to the list and switch off the models you do not use: Verify fails on the first enabled model that TKBK does not serve.

Override OpenAI Base URL:  ON
Base URL:                  https://api.tkbk.online/openai/v1
OpenAI API Key:            cr_YOUR_KEY
Add model:                 gpt-5.6-sol

With the override on, Cursor sends requests for these models to TKBK. Features that depend on Cursor’s own backend, such as Tab completion, may not be available; Chat and Edit work.

1. 1
   Click the ⚙ icon in the Cline panel to open its settings.
2. 2
   For Claude: choose Anthropic as the provider, tick Use custom base URL and enter the bare address, without /v1.
3. 3
   For GPT, DeepSeek and the rest: choose OpenAI Compatible and use the address that ends in /v1.
4. 4
   The key is the same in both cases.

# Claude models
API Provider:  Anthropic (tick "Use custom base URL")
Base URL:      https://api.tkbk.online
API Key:       cr_YOUR_KEY
Model:         claude-sonnet-5

# GPT, DeepSeek and the rest
API Provider:  OpenAI Compatible
Base URL:      https://api.tkbk.online/v1
API Key:       cr_YOUR_KEY
Model ID:      gpt-6.1-sol

1. 1
   Open Credentials → Create credential and choose Anthropic for Claude or OpenAI for everything else.
2. 2
   Fill in the fields below. The key is the same for both credentials.
3. 3
   In the OpenAI Chat Model node, switch off Use Responses API.

# Credentials -> Create credential -> Anthropic
API Key:   cr_YOUR_KEY
Base URL:  https://api.tkbk.online

# Credentials -> Create credential -> OpenAI
API Key:   cr_YOUR_KEY
Base URL:  https://api.tkbk.online/v1

The Anthropic address has no /v1; the OpenAI one has. A 404 in the OpenAI Chat Model node almost always means Use Responses API is still on.

1. 1
   Install: pip install anthropic openai or npm install @anthropic-ai/sdk openai
2. 2
   Pass the base URL and your key when you create the client.
3. 3
   Run the script.

Anthropic SDK: Claude models

from anthropic import Anthropic

client = Anthropic(base_url="https://api.tkbk.online", api_key="cr_YOUR_KEY")

message = client.messages.create(
    model="claude-sonnet-5",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello from TKBK"}],
)
print(message.content[0].text)

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

const client = new Anthropic({
  baseURL: "https://api.tkbk.online",
  apiKey: "cr_YOUR_KEY",
});

const message = await client.messages.create({
  model: "claude-sonnet-5",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello from TKBK" }],
});
console.log(message.content[0].type === "text" ? message.content[0].text : "");

OpenAI SDK: every model on your key

from openai import OpenAI

client = OpenAI(base_url="https://api.tkbk.online/v1", api_key="cr_YOUR_KEY")

response = client.chat.completions.create(
    model="gpt-6.1-sol",  # or claude-sonnet-5, deepseek-v4-pro, grok-4.7
    messages=[{"role": "user", "content": "Hello from TKBK"}],
)
print(response.choices[0].message.content)

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.tkbk.online/v1",
  apiKey: "cr_YOUR_KEY",
});

const response = await client.chat.completions.create({
  model: "gpt-6.1-sol", // or claude-sonnet-5, deepseek-v4-pro, grok-4.7
  messages: [{ role: "user", content: "Hello from TKBK" }],
});
console.log(response.choices[0].message.content);

Keep the key out of your source code: both SDKs also read it from ANTHROPIC_API_KEY and OPENAI_API_KEY in the environment.