# Search Users — Amplitude

> Look up Amplitude users by Amplitude ID, Device ID, User ID, or a User ID prefix. Use this before Get User Activity to resolve a user's amplitude_id. Example: call with user="user@example.com" -> returns {matches: [{amplitude_id: 12345678…

- Key: `amplitude-search-users`
- Type: Action (Read-only)
- Version: 0.0.2
- App: Amplitude (`amplitude`) — https://pipedream.com/apps/amplitude.md
- This page (HTML): https://pipedream.com/apps/amplitude/actions/search-users
- Hints: read-only · open-world
- Source: https://github.com/PipedreamHQ/pipedream/blob/master/components/amplitude/actions/search-users/search-users.mjs

## Description

Look up Amplitude users by Amplitude ID, Device ID, User ID, or a User ID prefix. Use this before **Get User Activity** to resolve a user's `amplitude_id`. Example: call with `user="user@example.com"` -> returns `{matches: [{amplitude_id: 12345678, user_id: "user@example.com"}], type: "user_id"}`. [See the documentation](https://amplitude.com/docs/apis/analytics/dashboard-rest#user-search).

## Props

| Prop | Type | Required | Description |
|---|---|---|---|
| `user` | `string` | Yes | A free-form user identifier (the user param): an Amplitude ID, Device ID, User ID, or a User ID prefix. Example: user@example.com. |

## Run it

**MCP**

```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": "amplitude",
      },
    },
  },
)

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

const { tools } = await mcp.listTools()

// listTools() hands your model this tool's input schema, so it can
// fill the arguments itself:
const result = await mcp.callTool({
  name: "amplitude-search-users",
  arguments: {
    user: "User",
  },
})
```

**TypeScript**

```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: "amplitude-search-users",
  externalUserId: "{external_user_id}", // any stable ID for this user in your system
  configuredProps: {
    amplitude: { authProvisionId: "apn_xxxxxxx" },
    user: "User",
  },
})

console.log(result)
```

**cURL**

```bash
curl -X POST https://api.pipedream.com/v1/connect/{project_id}/actions/run \
  -H "Content-Type: application/json" \
  -H "X-PD-Environment: production" \
  -H "Authorization: Bearer {access_token}" \
  -d '{
    "external_user_id": "{external_user_id}",
    "id": "amplitude-search-users",
    "configured_props": {
      "amplitude": { "authProvisionId": "apn_xxxxxxx" },
      "user": "User"
    }
  }'
```

---

- App: https://pipedream.com/apps/amplitude.md · All apps: https://pipedream.com/apps