# Fixing methodology (/api-reference/fixings/fixing-methodology)

## Fixing methodology

`GET https://data.tryopengrid.com/v1/fixings/methodology`

Fixing schedule, thresholds, correction windows, change notices.

### Parameters

- `OpenGrid-Version` (header, string): The API version to shape the response for. Default: the version pinned to your key.

### Response `data`

- `correction_windows` (object)
  - `daily_business_days` (number)
  - `hourly_hours` (number)
- `daily` (object)
  - `fixing_time` (string)
  - `hours` (number)
  - `min_hours` (number)
  - `statistic` (string)
- `hourly` (object)
  - `fixing_time` (string)
  - `rollup_overlap_hours` (number)
  - `safety_margin_hours` (number)
  - `taken_after` (string)
- `index_methodology_version` (string)
- `notices` (array)
- `settlement_indices` (array of string)
- `settlement_version` (string)
- `sufficiency` (object)
  - `min_components` (number)
  - `min_constituents` (number)
- `surveillance` (object)
  - `concentration_severe` (number)
  - `concentration_warn` (number)
  - `feed_outage_severe_share` (number)
  - `jump_pct` (number)
  - `new_listing_hours` (number)
  - `pre_fix_hours` (number)

Every success is `{"data": ..., "meta": {as_of, api_version, request_id, next_cursor?}}`.

### Example

```bash
curl "https://data.tryopengrid.com/v1/fixings/methodology" \
  -H "Authorization: Bearer $OPENGRID_API_KEY"
```