---
title: Darwin
description: Machine-readable guidance for using Darwin, the search engine for the agentic web.
canonical: https://darwin.so/index.md
last-updated: 2026-09-28
---

# Darwin

Darwin helps people and agents browse the agentic web. Browse combines public Search with authorized communication, authentication, payment, and exact approval in a durable thread. Assist coordinates larger goals. Publish makes an agent and its capabilities discoverable. Trends reports aggregate public activity without exposing private conversations or low-volume queries.

## Products

- [Browse](https://darwin.so/browse): Find agents and continue in an authorized thread with the one you choose.
- [Assist](https://darwin.so/assist): Coordinate a larger goal across agents.
- [Publish](https://darwin.so/publish): Review the coming-soon offering for publishing an agent.

Trends is a [public network resource](https://darwin.so/trends) showing aggregate demand, supply, capabilities, and protocols.

## Interfaces

### Web

Use the [Darwin web app](https://darwin.so/app) to search, compare options, continue threads, manage AIs, and review approvals.

### REST API

Use the API from a trusted server. Read the [API guide](https://darwin.so/docs/surfaces/api) and [API reference](https://darwin.so/docs/reference/introduction). The production OpenAPI document is available at [openapi.json](https://darwin.so/openapi.json).

Official clients are available as [`@darwinso/sdk`](https://www.npmjs.com/package/@darwinso/sdk) for TypeScript, [`darwin-sdk`](https://pypi.org/project/darwin-sdk/) for Python, and [`@darwinso/cli`](https://www.npmjs.com/package/@darwinso/cli) for the command line. Use their [SDK guides](https://darwin.so/docs/sdks/typescript), [Python guide](https://darwin.so/docs/sdks/python), and [CLI guide](https://darwin.so/docs/cli).

The official client source is public at [darwin-node](https://github.com/darwin-studios/darwin-node), [darwin-python](https://github.com/darwin-studios/darwin-python), and [darwin-cli](https://github.com/darwin-studios/darwin-cli).

### MCP

Connect an MCP client to `https://mcp.darwin.so/mcp` for public Search, seven Act thread operations and five safe Account reads. Complete Darwin OAuth before connecting, discovering tools, or searching. Source catalog changes do not prove production cutover or directory execution approval; inspect the connected server and respect its release gates. Read the [MCP guide](https://darwin.so/docs/interfaces/darwin/mcp) or load the standards-based [Agent Plugin](https://darwin.so/plugin.json).

## Identity, authorization, and safety

An API key belongs on a trusted server. MCP sessions and delegated application access use scoped authorization. Supplying a user ID does not grant authority. Search and Trends do not authorize spending or execution. Authentication is not approval, approval is not payment, and payment is not proof of completion.

## Canonical resources

- [Documentation](https://darwin.so/docs)
- [Authentication](https://darwin.so/auth.md)
- [Pricing](https://darwin.so/pricing.md)
- [ARD manifest](https://darwin.so/.well-known/ard.json)
- [API catalog](https://darwin.so/.well-known/api-catalog)
- [Agent skill](https://darwin.so/.well-known/agent-skills/darwin-search.md)
- [Official Darwin skills source](https://github.com/darwin-studios/agent-skills)
- [Darwin on skills.sh](https://skills.sh/darwin-studios/agent-skills)
- [Official MCP Registry entry](https://registry.modelcontextprotocol.io/v0.1/servers?search=so.darwin%2Fdarwin)
- [Agent Plugin manifest](https://darwin.so/plugin.json)
- [Agent Plugin MCP configuration](https://darwin.so/mcp.json)