# Loops.so — Pipedream Connect

> The email platform for modern SaaS. A better way to send product, marketing, and transactional email.

- API slug: `loops_so` (use in MCP headers and tool keys)
- Auth: API key (Pipedream-managed)
- Categories: Communication
- Website: https://loops.so/
- This page (HTML): https://pipedream.com/apps/loops-so
- Tools: 8 actions · 0 triggers

## Connect via MCP (recommended)

- Endpoint: `https://remote.mcp.pipedream.net/v3`
- Headers: `Authorization: Bearer <token>` · `x-pd-project-id` · `x-pd-environment` · `x-pd-external-user-id` · `x-pd-app-slug: loops_so`

```ts
import { Client } from "@modelcontextprotocol/sdk/client/index.js"
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js"
import { PipedreamClient } from "@pipedream/sdk"

const pd = new PipedreamClient({
  projectId: process.env.PIPEDREAM_PROJECT_ID!,
  clientId: process.env.PIPEDREAM_CLIENT_ID!,
  clientSecret: process.env.PIPEDREAM_CLIENT_SECRET!,
  projectEnvironment: "production",
})

const accessToken = await pd.rawAccessToken

const transport = new StreamableHTTPClientTransport(
  new URL("https://remote.mcp.pipedream.net/v3"),
  {
    requestInit: {
      headers: {
        Authorization: `Bearer ${accessToken}`,
        "x-pd-project-id": process.env.PIPEDREAM_PROJECT_ID!,
        "x-pd-environment": "production",
        "x-pd-external-user-id": "{external_user_id}", // any stable ID for this user in your system
        "x-pd-app-slug": "loops_so",
      },
    },
  },
)

const mcp = new Client({ name: "my-agent", version: "1.0.0" })
await mcp.connect(transport)

const { tools } = await mcp.listTools()

// e.g. run Create Contact:
const result = await mcp.callTool({
  name: "loops_so-create-contact",
  arguments: {
    email: "Email",
    firstName: "First Name",
  },
})
```

Docs: [MCP guide](https://pipedream.com/docs/connect/mcp/developers.md)

## API proxy

For a Loops.so endpoint with no pre-built tool, the proxy forwards your request with the connected user's credentials attached.

```bash
# The path segment is the target URL, URL-safe base64 encoded:
# https://app.loops.so/api/v1/api-key

curl "https://api.pipedream.com/v1/connect/{project_id}/proxy/aHR0cHM6Ly9hcHAubG9vcHMuc28vYXBpL3YxL2FwaS1rZXk?external_user_id={external_user_id}&account_id=apn_xxxxxxx" \
  -H "Authorization: Bearer {access_token}" \
  -H "x-pd-environment: production"
```

Docs: [API proxy guide](https://pipedream.com/docs/connect/api-proxy.md)

## SDK

```ts
import { PipedreamClient } from "@pipedream/sdk"

const pd = new PipedreamClient({
  projectId: process.env.PIPEDREAM_PROJECT_ID!,
  clientId: process.env.PIPEDREAM_CLIENT_ID!,
  clientSecret: process.env.PIPEDREAM_CLIENT_SECRET!,
  projectEnvironment: "production",
})

const result = await pd.actions.run({
  id: "loops_so-create-contact",
  externalUserId: "{external_user_id}", // any stable ID for this user in your system
  configuredProps: {
    loops_so: { authProvisionId: "apn_xxxxxxx" },
    email: "Email",
    firstName: "First Name",
  },
})
```

Docs: [Managed auth guide](https://pipedream.com/docs/connect/managed-auth/quickstart.md) · [Tools guide](https://pipedream.com/docs/connect/components.md)

## Actions (8)

### `loops_so-create-contact` — Create Contact (Write)

Creates a new contact. See the Documentation

Full schema: https://pipedream.com/apps/loops-so/actions/create-contact.md

### `loops_so-delete-contact` — Delete Contact (Write)

Delete an existing contact. See the documentation

Full schema: https://pipedream.com/apps/loops-so/actions/delete-contact.md

### `loops_so-find-contact` — Find Contact (Write)

Search for a contact by email address. See the Documentation

Full schema: https://pipedream.com/apps/loops-so/actions/find-contact.md

### `loops_so-list-custom-fields` — List Custom Fields (Read-only)

List your account's custom contact properties. See the documentation

Full schema: https://pipedream.com/apps/loops-so/actions/list-custom-fields.md

### `loops_so-list-mailing-lists` — List Mailing Lists (Read-only)

List your account's mailing lists. See the documentation

Full schema: https://pipedream.com/apps/loops-so/actions/list-mailing-lists.md

### `loops_so-send-event` — Send Event (Write)

Send an event to an email address. See the Documentation

Full schema: https://pipedream.com/apps/loops-so/actions/send-event.md

### `loops_so-send-transactional-email` — Send Transactional Email (Write)

Send a transactional email. See the Documentation

Full schema: https://pipedream.com/apps/loops-so/actions/send-transactional-email.md

### `loops_so-update-contact` — Update Contact (Write)

Updates an existing contact by email. If email not found, a new contact will be created. See the Documentation

Full schema: https://pipedream.com/apps/loops-so/actions/update-contact.md

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- All apps: https://pipedream.com/apps — index: https://pipedream.com/llms.txt
- Pipedream docs for agents: https://pipedream.com/docs/llms.txt