The OpenAI Agents API, open source and self-hosted. Run Codex, Claude Code or MiniMax Code on your own machines with your own models, through the official OpenAI SDK.
[](https://github.com/MiniMax-AI/OpenAgentCore/releases/latest) [](LICENSE)
[Website](https://openagentcore.dev/) · [Documentation](https://openagentcore.dev/docs/getting-started/) · [Quickstart](#quickstart) · [Contributing](CONTRIBUTING.md)
**English** · [简体中文](README.zh-CN.md)
- **Same API as OpenAI.** Set `OPENAI_BASE_URL` and the [official OpenAI SDK](https://developers.openai.com/api/docs/libraries), or plain HTTP, works unchanged.
- **Your agent, your model.** Each Session runs Codex, Claude Code or MiniMax Code natively, as it runs on your machine, with the model provider you configure. See [Harness capabilities](https://openagentcore.dev/contracts/agents-api/harness-capabilities).
- **Compute that sleeps, workspaces that stay.** On microsandbox, which keeps every workspace on independent storage, idle sandboxes release compute and resume on a compatible node with their files intact. E2B pauses idle sandboxes in place. Your own Linux, macOS or Windows machine also runs Sessions. See [Sandbox Provider protocol](https://openagentcore.dev/docs/sandbox-provider).
- **Replaceable parts.** Sandbox Providers, workspace filesystems, Harnesses and model providers plug in through [defined protocols](AGENTS.md#protocols-at-every-boundary).
## Quickstart
Install Core, Web and PostgreSQL on Linux or macOS with [Docker](https://openagentcore.dev/docs/getting-started/install#prerequisites):
```sh
curl -fsSL https://openagentcore.dev/install.sh | bash
```
On Windows, in PowerShell:
```powershell
irm https://github.com/MiniMax-AI/OpenAgentCore/releases/latest/download/install.ps1 | iex
```
In Web, sign in with the Core key the installer prints, configure the public address, set a default model, issue a Project API key and add sandbox capacity (a node or E2B). [Install Core and Web](https://openagentcore.dev/docs/getting-started/install) covers each step.
Then call it with the OpenAI SDK, with `OPENAI_BASE_URL` set to your API base URL (`https://core.example/v1`) and `OPENAI_API_KEY` to the Project API key:
```python
from openai import OpenAI
client = OpenAI() # reads OPENAI_BASE_URL and OPENAI_API_KEY
session = client.beta.agents.sessions.create(
environment={"type": "openai_hosted"},
input="Create /workspace/hello.txt with a short greeting, then describe it.",
extra_body={"agent": {"x_agents_core": {"harness": "codex"}}},
)
print(session.id)
```
[Run your first Session](https://openagentcore.dev/docs/getting-started/quickstart) waits for the result and reads it back.
## How it works
Applications and operators use these Core APIs:
| API | Path | Used by |
| --- | --- | --- |
| **[Agents API](https://openagentcore.dev/docs/api/public-agent-api)** | `/v1` | Your applications. Same protocol as [OpenAI's Agents API](https://developers.openai.com/api/docs/guides/agents-api/overview) |
| **[Core API](https://openagentcore.dev/contracts/agents-api/admin-api)** | `/core/v1` | Operators, through Web |
Core keeps durable execution state. The Runtime runs the chosen Harness inside the Environment. Each connection is a defined protocol, so any part can be replaced on its own. See [Architecture](https://openagentcore.dev/docs/architecture).
## Documentation
| I want to | Start with |
| --- | --- |
| Install and operate an installation | [Install Core and Web](https://openagentcore.dev/docs/getting-started/install), then [Operations](https://openagentcore.dev/docs/getting-started/operations) |
| Build an application on the API | [Run your first Session](https://openagentcore.dev/docs/getting-started/quickstart), then the [Agents API guide](https://openagentcore.dev/docs/api/public-agent-api) |
| See a complete application | [Examples](https://openagentcore.dev/docs/examples) |
| Run agents on my own machine | [Run self-hosted Sessions](https://openagentcore.dev/docs/getting-started/self-hosted) |
| Check Harness capabilities and limits | [Harness capabilities](https://openagentcore.dev/contracts/agents-api/harness-capabilities) |
| Understand the design | [Architecture](https://openagentcore.dev/docs/architecture) |
| Add a sandbox, Harness or other component | [Develop OpenAgentCore](https://openagentcore.dev/docs/development) |
## Contributing and license
Read [CONTRIBUTING.md](CONTRIBUTING.md) before changing code. Report bugs and ask questions in [GitHub Issues](https://github.com/MiniMax-AI/OpenAgentCore/issues). Released under the [MIT License](LICENSE).
