> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developer.jelliu.co/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developer.jelliu.co/_mcp/server.

# Jelliu Developers

Start the quickstart

Get an API key

Browse the API reference

## Get started

#### [Quickstart](/quickstart)

Create a key, list your agents and launch your first campaign in minutes.

#### [Authentication](/authentication)

API keys, scopes and what a `full` key unlocks.

#### [API reference](/api-reference)

Every endpoint with parameters, examples and a live request console.

## Make your first request

Every request goes to `https://api.jelliu.co` with a Bearer API key.

**`cURL`**

```bash cURL
curl https://api.jelliu.co/api/agents?limit=20 \
  -H "Authorization: Bearer $JELLIU_API_KEY"
```

**`Node.js`**

```javascript Node.js
const res = await fetch("https://api.jelliu.co/api/agents?limit=20", {
  headers: { Authorization: `Bearer ${process.env.JELLIU_API_KEY}` },
});
const { data } = await res.json();
```

**`Python`**

```python Python
import os, requests

res = requests.get(
    "https://api.jelliu.co/api/agents",
    params={"limit": 20},
    headers={"Authorization": f"Bearer {os.environ['JELLIU_API_KEY']}"},
)
agents = res.json()["data"]
```

## Build on the platform

#### [Webhooks](/webhooks)

Receive signed events when calls finish, and verify them in a few lines.

#### [MCP server](/mcp)

Give Claude, ChatGPT or Cursor safe access to your workspace.

#### [Web chat widget](/widget)

Embed a voice and chat agent on your site with one script tag.

#### [Errors and limits](/errors)

Error envelope, stable codes, rate limits and retry guidance.

## For AI agents

This site is readable by machines: every page has a Markdown version (append `.md`), [`/llms.txt`](/llms.txt) indexes the whole portal, and the docs expose an MCP server at `https://developer.jelliu.co/_mcp/server`. The raw OpenAPI 3.1 document is always live at [`api.jelliu.co/openapi.public.yaml`](https://api.jelliu.co/openapi.public.yaml).

Questions or something missing? Write to [support@jelliu.com](mailto:support@jelliu.com).