# List On-Calls — PagerDuty

> List on-call entries — who is on call right now or during a given time window. Filterable by schedule IDs or escalation policy IDs. Use List Schedules to discover schedule IDs and List Escalation Policies to discover policy IDs. Time…

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

## Description

List on-call entries — who is on call right now or during a given time window. Filterable by schedule IDs or escalation policy IDs. Use **List Schedules** to discover schedule IDs and **List Escalation Policies** to discover policy IDs. Time params use ISO 8601 with explicit UTC offset, e.g. `2026-06-02T15:00:00-07:00`. Set `earliest: true` to get one on-call entry per unique (schedule, escalation policy, escalation level) combination. [See the documentation](https://developer.pagerduty.com/api-reference/3a6b910f11050-list-all-of-the-on-calls)

## Props

| Prop | Type | Required | Description |
|---|---|---|---|
| `scheduleIds` | `string[]` | No | Filter results to on-calls for these schedule IDs. Use List Schedules to discover IDs. |
| `escalationPolicyIds` | `string[]` | No | Filter results to on-calls for these escalation policy IDs. |
| `since` | `string` | No | Start of time range (ISO 8601 with UTC offset, e.g. 2026-06-02T15:00:00-07:00). Defaults to now. |
| `until` | `string` | No | End of time range (ISO 8601 with UTC offset). Defaults to now. Search range cannot exceed 3 months. |
| `earliest` | `boolean` | No | When true, returns only the earliest on-call per unique (schedule, escalation policy, level) combination. |
| `limit` | `integer` | No | Maximum number of results to return (1–100). Default: 25. |
| `offset` | `integer` | No | Pagination offset. Default: 0. |

## 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": "pagerduty",
      },
    },
  },
)

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: "pagerduty-list-oncalls",
  arguments: {
    scheduleIds: ["Schedule IDs"],
    escalationPolicyIds: ["Escalation Policy IDs"],
  },
})
```

**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: "pagerduty-list-oncalls",
  externalUserId: "{external_user_id}", // any stable ID for this user in your system
  configuredProps: {
    pagerduty: { authProvisionId: "apn_xxxxxxx" },
    scheduleIds: ["Schedule IDs"],
    escalationPolicyIds: ["Escalation Policy IDs"],
  },
})

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": "pagerduty-list-oncalls",
    "configured_props": {
      "pagerduty": { "authProvisionId": "apn_xxxxxxx" },
      "scheduleIds": ["Schedule IDs"],
      "escalationPolicyIds": ["Escalation Policy IDs"]
    }
  }'
```

---

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