> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.simplified.com/api-reference/get-started/introduction/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.simplified.com/_mcp/server.

# Introduction

The API reference documents the HTTP operations available for direct integrations. The CLI and MCP expose subsets of these operations, with different discovery, input, and job-handling behavior. An endpoint appearing here does not mean it has a CLI command or is enabled on every MCP connection.

## Choose an interface

| Interface            | Best for                        | Coverage and behavior                                                                       |
| -------------------- | ------------------------------- | ------------------------------------------------------------------------------------------- |
| [MCP](/mcp/overview) | Working through an AI assistant | Discover the tools enabled on your connection; some tools handle polling or follow-up calls |
| [CLI](/cli/overview) | Terminal commands and scripts   | Use the commands in the published CLI; supported long-running commands offer `--wait`       |
| REST API             | Building a direct integration   | Supply HTTP requests, manage pagination, and poll asynchronous operations yourself          |

The published CLI 1.8.0 supports creative projects and items but does not have dedicated commands for PM boards, workflow management, agent management, or knowledge bases. MCP availability also depends on the connection's [tool inventory](/mcp/profiles-and-tool-inventory).

## Find the right API

| Product           | What it manages                                                | Start with                                                                                                                                                   |
| ----------------- | -------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Creative projects | Content containers and individual deliverables                 | [List projects](/api-reference/platform/projects/list-projects), [project items](/api-reference/platform/project-items/list-project-items)                   |
| Project Manager   | Boards, status columns, tasks, assignees, and dependencies     | [List boards](/api-reference/project-manager/boards/list-boards)                                                                                             |
| Workflows         | Reusable definitions, publication, executions, and run control | [Find workflows](/api-reference/workflows/discovery/list-workflows), [create a draft](/api-reference/workflows/authoring/create-workflow)                    |
| Agents            | Agent configuration, skills, toolkits, and triggers            | [List agents](/api-reference/agents/management/list-agents)                                                                                                  |
| Knowledge Bases   | Source collections, ingestion, and retrieval                   | [List collections](/api-reference/knowledge-bases/knowledge/list-knowledge-bases), [search](/api-reference/knowledge-bases/knowledge/search-knowledge-bases) |

Creative projects and PM boards are separate resources. The former uses project and item operations; the latter uses board, status, and task operations. A project item ID is not a task ID. See [Organize and automate](/mcp/organize-and-automate) for a practical example using both.

The other API sections cover workspace identity, brand context, assets, generation, social publishing and analytics, media processing, and notifications.

## Base URLs

Most operations use:

```text
https://api.simplified.com
```

Agents and Knowledge Bases use:

```text
https://kd-agents.simplified.com
```

The same workspace credential works with both services. Use the server and path shown on the individual endpoint page.

## Make your first integration

1. [Create an API key and authenticate](/api-reference/get-started/authentication).
2. [Identify the workspace and select a space](/api-reference/get-started/workspaces-and-spaces).
3. Read the endpoint's required parameters and request schema.
4. Submit the request and keep the returned identifiers.
5. For background work, follow [Async jobs and polling](/api-reference/get-started/async-jobs-and-polling) and the endpoint's documented completion state.

HTTP schemas describe the direct API call. An MCP tool may add convenience inputs or follow-up behavior; use the current tool schema when calling MCP rather than assuming every tool argument belongs in the REST body.

> Build integrations with the APIs behind Simplified's content, project management, and automation products.