<SYSTEM>This is the full developer documentation for La Growth Machine API</SYSTEM>

# La Growth Machine API

> Campaigns, audiences, leads, enrichment, LinkedIn and email messages, inbox and real-time webhooks, from your own code or your AI agent.

Get started

Get your API key, authenticate and make your first call in two minutes. [Quickstart →](/guides/quickstart/)

API Reference

39 endpoints with request examples, responses and an interactive console. [Browse →](/api-reference)

For AI agents

`llms.txt`, the raw OpenAPI file and our MCP server, so Claude, ChatGPT or Cursor can use the API. [Read →](/agents/)

Debugging

Every call is logged in your workspace. [See how →](/guides/debugging/)

# For AI agents

> Machine-readable entry points to the La Growth Machine API.

This site is built to be read by agents as well as humans.

| Resource        | URL                               | Use it for                                                                          |
| --------------- | --------------------------------- | ----------------------------------------------------------------------------------- |
| `llms.txt`      | [/llms.txt](/llms.txt)            | Index of the docs, in Markdown, per [llmstxt.org](https://llmstxt.org)              |
| `llms-full.txt` | [/llms-full.txt](/llms-full.txt)  | The whole documentation in one Markdown file                                        |
| OpenAPI 3.1     | [/openapi.yaml](/openapi.yaml)    | Generate a client, tools or function definitions                                    |
| MCP server      | `https://mcp.lagrowthmachine.com` | Let Claude, ChatGPT or Cursor act on your workspace, see [MCP server](/agents/mcp/) |

## Prompt to give your coding agent

[Section titled “Prompt to give your coding agent”](#prompt-to-give-your-coding-agent)

```text
You integrate with the La Growth Machine API.
Read https://developers.lagrowthmachine.com/llms-full.txt for the guides
and https://developers.lagrowthmachine.com/openapi.yaml for the exact endpoints.
Authenticate with "Authorization: Bearer $LGM_API_KEY" and never log the key.
Respect the rate limit: 50 calls per 10 seconds, back off on 429.
Enrichment spends credits: check GET /credits first and ask before calling POST /leads/enrich.
```

# MCP server

> Connect an AI assistant to your workspace.

The La Growth Machine MCP server exposes your campaigns, audiences, leads and inbox as tools for MCP clients (Claude, ChatGPT, Cursor…).

* URL: `https://mcp.lagrowthmachine.com`
* Authentication: OAuth, you sign in with your La Growth Machine account.

Note

Tool list and per-client setup screenshots coming soon.

# Authentication

> Authenticate your requests with your API key.

Base URL: `https://apiv2.lagrowthmachine.com/flow`

Send your API key in a header. Two forms are supported.

**Authorization header (recommended)**

```bash
curl -H "Authorization: Bearer YOUR_API_KEY" https://apiv2.lagrowthmachine.com/flow/members
```

**`x-api-key` header**

```bash
curl -H "x-api-key: YOUR_API_KEY" https://apiv2.lagrowthmachine.com/flow/members
```

Deprecated: query string

`?apikey=YOUR_API_KEY` still works for backward compatibility and for the website visitor webhooks, whose third-party dashboards only accept a URL. It exposes the key in server logs, browser history and `Referer` headers: avoid it elsewhere.

Never share your API key publicly: it gives full access to your workspace data.

# Debugging

> Every API call is logged in your workspace.

Go to [app.lagrowthmachine.com/settings/api](https://app.lagrowthmachine.com/settings/api). You’ll find the history of your API calls:

* the endpoint used (e.g. *Create Lead*, *List Audiences*);
* the status (success or error) and a summary of the result (e.g. “139 audiences returned”);
* the timestamp, and a toggle to show only failed requests.

If your integration doesn’t behave as expected, check this log first.

# Quickstart

> Make your first API call.

1. Open **Settings → Integrations & API** in the app: [app.lagrowthmachine.com/settings/api](https://app.lagrowthmachine.com/settings/api). The API is available from the Pro plan.
2. Copy your API key.
3. Test it on `/members`:

```bash
curl -H "Authorization: Bearer YOUR_API_KEY" \
  https://apiv2.lagrowthmachine.com/flow/members
```

Expected response:

```json
[{ "id": "lgm-member-id", "name": "Boris T.", "label": "Boris T." }]
```

Then browse the [API Reference](/api-reference).

# Rate limits

> 50 calls per 10 seconds per API key.

API access is limited to **50 calls per 10 seconds per API key**. Above that, requests are rejected with `429 Too Many Requests`.

* Retry with exponential backoff.
* Avoid polling and tight loops; prefer [inbox webhooks](/api-reference#tag/inbox).
* Cache what you can.