Every Fable, Opus and Sonnet model, passed straight through on the native Anthropic API. Point Claude Code at one new address and pay 71% less than list price.
https://boombit.online
$ export ANTHROPIC_BASE_URL=https://boombit.online
$ export ANTHROPIC_AUTH_TOKEN=sk-bb-••••••••
$ claude
> Add pagination to the orders list endpoint and write tests
● Update(src/routes/orders.ts) +18 −4
● Update(test/orders.test.ts) +36
● Bash(npm test) 42 passed
claude-fable-5-1The top flagship, for the hardest reasoning and the longest agent runs.
claude-opus-5-5Highly capable at under half the price of Fable. Built for complex coding and large refactors.
claude-sonnet-5-5Balanced speed and capability. The default for everyday coding and agents.
Still available, priced off list price tooPrices are for the Dedicated line, in CNY per 1M tokens, input / output.
No need to learn the quirks of dozens of providers. When Claude ships a new model or feature, we support it fast.
Requests go to Claude unchanged: extended thinking, tool use, image input and prompt caching (including 1-hour caching) all behave as they do with Anthropic directly. An OpenAI-compatible endpoint is there too, so older projects keep their SDK.
Claude Code and Claude Desktop use the Dedicated line, which is steadier and cheaper. OpenCode, OpenClaw, other tools and your own code use the Universal line.
Cache hits cost 5% of the normal input price on Opus 5.5, so long sessions get cheaper as they go. The logs show how much each request hit the cache.
Each call is logged with its model, tokens and cost. Filter by key, model or time.
Create a key per project or teammate with its own group, spend limit and expiry, and see exactly who spent what.
Each line has a rate: for every $1 of usage at Anthropic's list price, you pay that line's price in CNY. Prices below already include the rate. You're billed for the tokens you actually use, with no monthly fee or minimum.
Pick the group when you create an API key to use that line. See live models in the model square
No code changes for the official SDKs or Claude Code. Just swap the address and key.
https://boombit.online, add your key, and start making calls.Use a key from the Claude Code (Dedicated) group. Run this in your terminal, or add it to ~/.zshrc to keep it
export ANTHROPIC_BASE_URL=https://boombit.onlineexport ANTHROPIC_AUTH_TOKEN=sk-your-keyclaudeThe official anthropic library, with a key from the Universal group
from anthropic import Anthropicclient = Anthropic( base_url="https://boombit.online", api_key="sk-your-key",)msg = client.messages.create( model="claude-sonnet-5-5", max_tokens=1024, messages=[{"role": "user", "content": "Hello"}],)print(msg.content[0].text)The official @anthropic-ai/sdk package, with a key from the Universal group
import Anthropic from "@anthropic-ai/sdk";const client = new Anthropic({ baseURL: "https://boombit.online", apiKey: "sk-your-key",});const msg = await client.messages.create({ model: "claude-sonnet-5-5", max_tokens: 1024, messages: [{ role: "user", content: "Hello" }],});console.log(msg.content[0].text);Check your key works with curl, using a key from the Universal group
curl https://boombit.online/v1/messages \ -H "x-api-key: sk-your-key" \ -H "anthropic-version: 2023-06-01" \ -H "content-type: application/json" \ -d '{ "model": "claude-sonnet-5-5", "max_tokens": 256, "messages": [{"role": "user", "content": "Hello"}] }'OpenCode, OpenClaw, Hermes Agent and similar tools use a key from the Universal group. CC Switch is the easiest way to set them up
# If the client supports Anthropic (recommended)Base URL https://boombit.online# If it only supports the OpenAI formatBase URL https://boombit.online/v1API Key sk-your-keyModel claude-sonnet-5-5 # see the model list aboveThis list follows CC Switch. Claude Code and Claude Desktop use a Dedicated key. Other tools use a Universal key with the Anthropic format and the address https://boombit.online.
On the API Keys page, click "Import to CC Switch" next to a key and choose Claude Code. No config files to edit. For Claude Desktop, add a provider in CC Switch, choose Direct, set the address to https://boombit.online and use a Dedicated key. For other tools, add a custom provider with the Anthropic Messages format, the address https://boombit.online and a Universal key. Codex and Grok Build need routing turned on in CC Switch.
Can't find an answer? Email us at service@boombit.online.
claude-opus-5-5. When Anthropic releases a new model, we add it as soon as we can.ANTHROPIC_BASE_URL is https://boombit.online (without /v1), that ANTHROPIC_AUTH_TOKEN is a key from the Dedicated or Universal group, and that your balance is above zero.Pay for what you use. No monthly fee.