Quickstart

Base URL https://unlimited-deepseek.com/v1. Authenticate with Authorization: Bearer cp-… or x-api-key: cp-…. Create a key in the dashboard.

New accounts get a free 1-hour trial with up to 1M tokens; the clock starts at your first API call.

curl

curl https://unlimited-deepseek.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "deepseek-v4.1-flash", "messages": [{"role": "user", "content": "Hello"}]}'

OpenAI SDK

# pip install openai
from openai import OpenAI

client = OpenAI(base_url="https://unlimited-deepseek.com/v1", api_key="cp-...")
r = client.chat.completions.create(
    model="glm-5.3-flash",
    messages=[{"role": "user", "content": "Write a haiku about ledgers"}],
    stream=True,
)
for chunk in r:
    print(chunk.choices[0].delta.content or "", end="")

// npm i openai
import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://unlimited-deepseek.com/v1", apiKey: process.env.API_KEY });
const r = await client.chat.completions.create({ model: "deepseek-v4.1-flash", messages: [{ role: "user", content: "Hi" }] });

Anthropic SDK

import anthropic
client = anthropic.Anthropic(base_url="https://unlimited-deepseek.com", api_key="cp-...")
msg = client.messages.create(model="deepseek-v4.1-flash", max_tokens=1024,
                             messages=[{"role": "user", "content": "Hi"}])

Claude Code

export ANTHROPIC_BASE_URL=https://unlimited-deepseek.com
export ANTHROPIC_AUTH_TOKEN=cp-...
export ANTHROPIC_MODEL=deepseek-v4.1-flash
export ANTHROPIC_SMALL_FAST_MODEL=glm-5.3-flash
claude

OpenCode

Add a provider to ~/.config/opencode/opencode.json:

{
  "provider": {
    "unlimited-deepseek": {
      "npm": "@ai-sdk/openai-compatible",
      "options": { "baseURL": "https://unlimited-deepseek.com/v1", "apiKey": "{env:API_KEY}" },
      "models": { "deepseek-v4.1-flash": {}, "glm-5.3-flash": {} }
    }
  }
}

Models

Endpoints: POST /v1/chat/completions, POST /v1/messages, GET /v1/models. Streaming responses include a final usage chunk, which is what you are billed for.

Errors