# Boundless API

> Boundless API (BoundlessAPI) is a unified, OpenAI-compatible LLM API router. One API key, one base URL, curated access to Claude, GPT, Gemini, and other models — pay-as-you-go, no subscription.

Boundless is an OpenRouter-style unified API with lower published prices for popular models and no OpenRouter-style platform fee on credits. Sign up with Google, GitHub, or email; $5 credit on signup; no credit card required to start.

Website: https://www.boundlessapi.com
Console / signup: https://oneapi.boundlessapi.com
API base URL: https://api.boundlessapi.com/v1
Support: support@boundlessapi.com
Discord: https://discord.gg/8JV6ngQeH

Last updated: 2026-08-13

## Key facts

- Product name: Boundless API (also written BoundlessAPI)
- API style: OpenAI-compatible Chat Completions (and related endpoints)
- Base URL for SDKs: `https://api.boundlessapi.com/v1`
- Models: 42 curated models in catalog (live availability varies; see Models page)
- Pricing rule: GPT & Claude models at **50% off official** list rates; other models **25% off official**
- vs OpenRouter: OpenRouter typically charges market/official rates plus ~5% on credits; Boundless publishes side-by-side rates and does **not** add an OpenRouter-style platform fee on credits
- Billing: prepaid credits, pay-as-you-go, no subscription; credits never expire
- Signup bonus: **$5** on signup (Google / GitHub / email); no credit card required to start
- Privacy default: **zero data retention** — prompts/completions not stored by default; only billing metadata (model, token counts, latency). Opt-in request logging is off unless enabled
- Inference: US-region inference available
- Languages: English and Chinese site (`/en/`, `/cn/`)

## Quickstart (one-line change from OpenAI SDK)

```python
from openai import OpenAI

client = OpenAI(
    api_key="bai-xxxxxxxx",
    base_url="https://api.boundlessapi.com/v1",
)

response = client.chat.completions.create(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
```

Example live model IDs include: `claude-sonnet-4-6`, `claude-opus-4-8`, `claude-haiku-4-5-20251001`, `gpt-5.5`, `gpt-5.4`. Always confirm current prices and status on the Models page.

## Boundless vs OpenRouter (short)

| | Boundless API | OpenRouter |
|---|---|---|
| Models | 42 curated, one key | 400+ models, one key |
| Pricing | GPT & Claude −50% vs official; others −25%; no platform fee on credits | Market rates + ~5% credit fee |
| DX | OpenAI-compatible; change `base_url` | OpenAI-compatible |
| Start | $5 on signup; Google / GitHub / email | Self-serve |

Migration from OpenRouter: swap API key and set `base_url` to `https://api.boundlessapi.com/v1` (often one line of code).

## Docs (English)

- [Home](https://www.boundlessapi.com/en/): https://www.boundlessapi.com/en/
- [Quickstart](https://www.boundlessapi.com/en/quickstart.html): https://www.boundlessapi.com/en/quickstart.html
- [Models & pricing table](https://www.boundlessapi.com/en/models.html): https://www.boundlessapi.com/en/models.html
- [Pricing / credits](https://www.boundlessapi.com/en/pricing.html): https://www.boundlessapi.com/en/pricing.html
- [FAQ](https://www.boundlessapi.com/en/faq.html): https://www.boundlessapi.com/en/faq.html
- [Migrate from OpenRouter](https://www.boundlessapi.com/en/migrating-from-openrouter.html): https://www.boundlessapi.com/en/migrating-from-openrouter.html
- [How billing works](https://www.boundlessapi.com/en/how-billing-works.html): https://www.boundlessapi.com/en/how-billing-works.html
- [Authentication](https://www.boundlessapi.com/en/authentication.html): https://www.boundlessapi.com/en/authentication.html
- [API reference](https://www.boundlessapi.com/en/api-reference.html): https://www.boundlessapi.com/en/api-reference.html
- [Data policy](https://www.boundlessapi.com/en/data-policy.html): https://www.boundlessapi.com/en/data-policy.html
- [Prompt caching](https://www.boundlessapi.com/en/prompt-caching.html): https://www.boundlessapi.com/en/prompt-caching.html
- [Changelog](https://www.boundlessapi.com/en/changelog.html): https://www.boundlessapi.com/en/changelog.html

## Docs (中文)

- [首页](https://www.boundlessapi.com/cn/): https://www.boundlessapi.com/cn/
- [快速开始](https://www.boundlessapi.com/cn/quickstart.html): https://www.boundlessapi.com/cn/quickstart.html
- [模型与价格](https://www.boundlessapi.com/cn/models.html): https://www.boundlessapi.com/cn/models.html
- [定价](https://www.boundlessapi.com/cn/pricing.html): https://www.boundlessapi.com/cn/pricing.html
- [常见问题](https://www.boundlessapi.com/cn/faq.html): https://www.boundlessapi.com/cn/faq.html
- [从 OpenRouter 迁移](https://www.boundlessapi.com/cn/migrating-from-openrouter.html): https://www.boundlessapi.com/cn/migrating-from-openrouter.html
- [计费说明](https://www.boundlessapi.com/cn/how-billing-works.html): https://www.boundlessapi.com/cn/how-billing-works.html
- [数据政策](https://www.boundlessapi.com/cn/data-policy.html): https://www.boundlessapi.com/cn/data-policy.html

## Optional

- Full prose / longer context: see FAQ and Models pages above for the latest rates and live model status
- Status: https://www.boundlessapi.com/en/status-page.html