---
title: "DA-vs-IDA1 spread history + spread_forecast_v0 (climatology) + spread_forecast_v1 (ML, Scale)"
method: GET
path: "/v1/intraday/{zone}/spread"
---

# DA-vs-IDA1 spread history + spread_forecast_v0 (climatology) + spread_forecast_v1 (ML, Scale)

`GET /v1/intraday/{zone}/spread`

## Request

- Base URL: `https://voltcast.com/api`
- URL: `https://voltcast.com/api/v1/intraday/{zone}/spread`
- Auth: HTTP bearer

## Path parameters

- `zone` string, required

## Query parameters

- `days` integer

## Response `200`

Daily spread history, the v0 climatology baseline, and (Scale) volt-spread-1: tomorrow's per-slot expected IDA1-DA spread, issued before the 15:00 local IDA1 gate and scored daily against v0 - verification_30d included.

---

[API](https://skmtc.dev/voltcast/apis/voltcast-api.md) · [All operations](https://skmtc.dev/voltcast/apis/voltcast-api/llms.txt) · [OpenAPI document](https://skmtc.dev/voltcast/apis/voltcast-api/revisions/9c39e52e3eed?raw)