> ## Documentation Index
> Fetch the complete documentation index at: https://docs.iqrush.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Check results stability

> Check whether one measurement has converged for the requested scope.

Check whether one measurement has converged for the requested scope.

**MCP tool:** `get_results_stability`. **Operation:** read. Uses the authorized connection; no project or content changes are made by this tool.

## Parameters

| Name | Type | Required | Default | Meaning and accepted values |
| - | - | - | - | - |
| `project_id` | string | Yes | `Required` | Project ID from list\_projects. Select the project in the intended workspace and environment. |
| `run_id` | string | Yes | `Required` | Run ID from list\_runs for this project. Use the exact returned value and check readiness before reading measurements. |
| `filters` | object\[] or null | No | `null` | Select measured answers with objects containing dimension and values. Use labels from list\_dimension\_options; inspect returned warnings for filters that were not applied. |
| `aggregation_level` | string | No | `'domain'` | domain requests source-domain results; url requests individual-page results. Keep the same reporting unit when comparing measurements. |

## Example call

Replace ID placeholders and example selections with values from your account. This is the `params` object for MCP `tools/call`.

```json theme={null}
{
  "name": "get_results_stability",
  "arguments": {
    "project_id": "PROJECT_ID",
    "run_id": "RUN_ID",
    "aggregation_level": "domain"
  }
}
```

## Read the response

Read `data.is_converged`, `rank_corr_ok`, `sufficiency_ok`, `structural_snr`, `structural_snr_grain`, and `target_sufficiency_ratio`. `data.results_stability.value` is an SNR value.

### Fields to use

These selected fields explain the example and the result to preserve. Field presence depends on the response; this is not a complete response schema.

| Field | Meaning and use |
| - | - |
| `data.rank_corr_ok` | Whether the returned ranking-stability check passed. |
| `data.sufficiency_ok` | Whether the returned signal-sufficiency check passed. |
| `data.is_converged` | Whether both required checks passed for the reported scope. |
| `data.structural_snr` | Returned signal-to-noise ratio; use it with the pass flags. |
| `data.structural_snr_grain` | Whether that ratio describes domain or URL results. |
| `data.target_sufficiency_ratio` | Returned sufficiency target. Passing it alone does not establish convergence. |

## Response example

Selected fields from an observed IQRush Dev response. Lists are shortened and project/run IDs are placeholders. Omitted fields remain available in the actual response.

```json theme={null}
{
  "data_ready": true,
  "data": {
    "rank_corr_ok": true,
    "sufficiency_ok": true,
    "is_converged": true,
    "structural_snr": 2.394432125056379,
    "structural_snr_grain": "domain",
    "target_sufficiency_ratio": 1
  }
}
```

Read the actual returned scope, counts, and interval levels before interpreting these fields.

## Important behavior

Both required checks must pass. The current target is 1.00; use the returned target and flags. Domain and URL SNR are different scopes. This is not a cross-run change test.

Check tool and payload errors before using the result. [Response handling](/developers/guides/09-responses-and-metrics) explains estimates and empty results; [errors and recovery](/developers/guides/13-errors) covers invalid requests and temporary failures.

HTTP equivalent: [Check results stability](/developers/http/http-get-results-stability). HTTP parameters and defaults can differ.


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