---
title: "start_execution"
description: "Start a campaign execution without waiting for results."
sidebarTitle: "start_execution"
lastUpdated: "2026-09-23"
---

> **For AI agents:** the complete documentation index is at [llms.txt](/llms.txt). Append `.md` to any page URL for its markdown version.

{/* GENERATED FILE: do not edit by hand. Regenerate with: node scripts/generate.mjs */}

Start a campaign execution without waiting for results.

<Warning>
  **Destructive · Writes data · Calls external systems.** This tool can modify or delete data. Review the arguments before letting an agent call it.
</Warning>

## Parameters

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `campaign_json` | string | Yes | Campaign JSON template (from build_campaign) |
| `ignore_errors` | boolean | No | Ignore failures across all action types (options.ignore_failed = &lt;all action codes&gt;). |
| `overrides` | string | No | JSON object mapping test IDs to their variable values and owner assignments. Same format as run_campaign overrides. |
| `parallel` | boolean | No | Run campaign tests in parallel (options.parallel_test_execution=-1). Superadmin-only; the platform rejects test lists that use SIM or SMARTPHONE actions, or sleep on unlocked resources. |

## Example arguments

Illustrative arguments an agent supplies when calling this tool:

```json
{
  "campaign_json": "string"
}
```

## Description

```text
Returns a result_id for polling. Use this for campaigns that may take longer than 10 minutes, then poll with poll_execution. For shorter campaigns you want to block on, use run_campaign instead.
```

## Related

- [`poll_execution`](/mcp/tools/execution/poll_execution)
- [`run_campaign`](/mcp/tools/execution/run_campaign)

## What's next?

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