Invariant Gateway is a lightweight zero-configuration service that acts as an intermediary between AI Agents and LLM providers (such as OpenAI and Anthropic).

Gateway automatically traces agent interactions and stores them in the Invariant Explorer, giving you insights into what your agents are doing.

Single Line Setup: Just change the base URL of your LLM provider to the Invariant Gateway.
Intercepts agents on an LLM-level for better debugging and analysis.
Tool Calling and Computer Use Support to capture all forms of agentic interactions.
Seamless forwarding and LLM streaming to OpenAI, Anthropic, and other LLM providers.
Store and organize runtime traces in the Invariant Explorer.

Quickstart for Users

Looking to observe and secure AI agents in your organization? See our quickstart guide for users to get started.

Quickstart for Developers

To get started with Gateway, follow the integration guides below depending on the LLM provider you are using.

Integration Guides

🔹 OpenAI Integration

Follow these steps to obtain an OpenAI API key.

Modify OpenAI Client Setup

Instead of connecting directly to OpenAI, configure your OpenAI client to use the proxy:

from httpx import Client
from openai import OpenAI

client = OpenAI(
    http_client=Client(
        headers={
            "Invariant-Authorization": "Bearer your-invariant-api-key"
        },
    ),
    base_url="http://localhost:8005/api/v1/proxy/{add-your-dataset-name-here}/openai",
)

Note: Do not include the curly braces {}. If the dataset does not exist in Invariant Explorer, it will be created before adding traces.

🔹 Anthropic Integration

Follow these steps to obtain an Anthropic API key.

Modify Anthropic Client Setup

from httpx import Client
from anthropic import Anthropic

client = Anthropic(
    http_client=Client(
        headers={
            "Invariant-Authorization": "Bearer your-invariant-api-key"
        },
    ),
    base_url="http://localhost:8005/api/v1/proxy/{add-your-dataset-name-here}/anthropic",
)

Note: Do not include the curly braces {}. If the dataset does not exist in Invariant Explorer, it will be created before adding traces.

Quickstart for Users

If you are not building an agent yourself but would like to observe and secure AI agents in your organization, you can do so by configuring the agents to use the Gateway.

See below for example integrations with popular agents.

OpenHands Integration

OpenHands (formerly OpenDevin) is a platform for software development agents powered by AI.

How to Integrate OpenHands with Invariant Proxy

Step 1: Modify the API Base

Enable the Advanced Options toggle under settings and update the Base URL:

Step 2: Adjust the API Key Format

Set the API Key using the following format:

{your-llm-api-key}|invariant-auth: {your-invariant-api-key}

Note: Do not include the curly braces {}.

The Invariant Proxy extracts the invariant-auth field from the API key and correctly forwards it to Invariant Explorer while sending the actual API key to OpenAI or Anthropic.

SWE-agent Integration

SWE-agent allows your preferred language model (e.g., GPT-4o or Claude Sonnet 3.5) to autonomously utilize tools for various tasks, such as fixing issues in real GitHub repositories.

Using SWE-agent with Invariant Proxy

SWE-agent does not support custom headers, so you cannot pass the Invariant API Key via Invariant-Authorization. However, there is a workaround using the Invariant Proxy.

Step 1: Modify the API Base

Run sweagent with the following flag:

--agent.model.api_base=http://localhost:8005/api/v1/proxy/{add-your-dataset-name-here}/openai

Note: Do not include the curly braces {}.

Step 2: Adjust the API Key Format

Instead of setting your API Key normally, modify the environment variable as follows:

export OPENAI_API_KEY={your-openai-api-key}|invariant-auth: {your-invariant-api-key}
export ANTHROPIC_API_KEY={your-anthropic-api-key}|invariant-auth: {your-invariant-api-key}

Note: Do not include the curly braces {}.

This setup ensures that SWE-agent works seamlessly with Invariant Proxy, maintaining compatibility while enabling full functionality. 🚀

Run the Gateway Locally

To start the Invariant Gateway, run:

bash run.sh build && bash run.sh up

This will launch the proxy at http://localhost:8005/api/v1/proxy/.

Set Up an Invariant API Key

Follow the instructions here to obtain an API key. This allows the proxy to push traces to Invariant Explorer.

Development

Pushing to Local Explorer

By default the proxy points to the Production Explorer instance. To point it to your local Explorer instance, modify the INVARIANT_API_URL value inside .env. Follow instructions in .env on how to point to the local instance.

Run Tests

To run tests, execute:

./run.sh tests