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What is Stewrd?

Stewrd is a managed AI agent API for developers. Send a task via one REST endpoint, get finished work back — research reports, generated documents, executed code, processed data, and automated browser actions. Stewrd handles orchestration, tool execution, sandboxing, file storage, and sessions so you don’t have to build agent infrastructure yourself. Bring your own LLM key (OpenAI or OpenRouter) and pay only for the infrastructure. No agent frameworks. No servers to manage. No prompt engineering.

Base URL

https://api.stewrd.dev
v1 — Stable

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How it works

1

Send a message

POST a message to /v1/agent with your API key. Optionally specify which capabilities to use.
2

Agent does the work

Stewrd routes your request through the right tools — research, code execution, document generation, and more.
3

Get finished work back

Receive a JSON response with the agent’s message, any generated files, and usage info.

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Quick example

curl -X POST https://api.stewrd.dev/v1/agent \
  -H "Authorization: Bearer sk-stw_your_key" \
  -H "Content-Type: application/json" \
  -d '{"message": "What is the capital of France?"}'

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What’s next?

Quick Start

Get your first response in under two minutes

Authentication

Learn about API keys and auth headers

Capabilities

See what the agent can do

API Reference

Interactive API playground