April 01, 2026

Changed

Slow Reserve added to GB endpoints

Affected endpoints:

• GET /gb/modo/benchmarking/asset-operations-live
• GET /gb/modo/benchmarking/monthly-leaderboard

New response fields:

• sr - Slow Reserve revenue data

Changed

Forecast metadata and asset fields now nullable

Two fields can now accept null values in forecast responses and requests.

Affected endpoints:

• GET /forecasts/ercot-forecasts-list/
• GET /forecasts/forecasts/
• GET /forecasts/forecasts/{id}/
• GET /forecasts/gb-forecasts-list/
• POST /forecasts/run-simulation/

Updated fields:

• forecast_metadata.capacity_mwh_battery - Can now be null
• run_asset.custom_degradation_curve_file_name - Can now be null

March 26, 2026

Changed

Germany region support added to indices endpoint

GET /indices/

Updated parameter:

• market_region (query) - Now accepts germany as an available value in addition to nem, caiso, ercot, and gb

Forecast run assets

Two forecast endpoints now support custom degradation curves and require GSP group for GB assets.

GET /forecasts/forecasts/

New response fields:

• run_asset.custom_uploaded_degradation_curve (object) - Custom degradation curve file with id, file_type, and file URI
• run_asset.custom_uploaded_degradation_curve_id (uuid) - Reference to custom degradation curve

Required fields:

• run_asset.gb_run_asset.gsp_group - Now required for GB run assets

POST /forecasts/run-simulation/

New request fields:

• run_asset.custom_uploaded_degradation_curve (object) - Custom degradation curve file
• run_asset.custom_uploaded_degradation_curve_id (uuid) - Reference to custom degradation curve

Required fields:

• run_asset.gb_run_asset.gsp_group - Now required for GB run assets

New response fields: Same as GET endpoint above

March 20, 2026

Removed

IndexV2 schema field

The benchmark_type field has been removed from the IndexV2 response schema.

Impact:

• Endpoints returning IndexV2 objects no longer include the benchmark_type field
• Code referencing response.benchmark_type should be updated to remove this field access

Changed

Index schema updates

New fields in IndexV2:

• benchmark_type (string, read-only) - The benchmark type classification of the index

Changed

Forecast endpoints support simulation configuration

Two forecast endpoints now include a simulation_config field for schema-driven dispatch.

GET /forecasts/forecasts/

New response fields:

• simulation_config (object, nullable) - JSON payload for schema-driven dispatch. Validated against GDM schema before dispatch.

POST /forecasts/run-simulation/

New request parameter:

• simulation_config (object, nullable) - JSON payload for schema-driven dispatch. Validated against GDM schema before dispatch.

New response field:

• simulation_config (object, nullable) - JSON payload for schema-driven dispatch. Validated against GDM schema before dispatch.

March 05, 2026

Changed

Index region field

19 European region values removed from the region field enum in the Index model.

Removed regions:

Index region field expanded

The Index model's region field now accepts 19 additional European regions.

New regions:

• Bulgaria
• Croatia
• Czechia
• Estonia
• Greece
• Hungary
• Ireland
• Italy
• Latvia
• Lithuania
• Montenegro
• North Macedonia
• Portugal
• Romania
• Serbia
• Slovakia
• Slovenia
• Spain
• Ukraine

Queries filtering by these region values will no longer return results. Update filters to use supported regions.

Changed

Forecast field validation

Validation constraints added to integer fields across forecast endpoints. Fields now include minimum (0) and maximum (9223372036854776000) value boundaries.

Affected endpoints:

• GET /forecasts/ercot-forecasts-list/
• GET /forecasts/forecasts/
• GET /forecasts/forecasts/{id}/
• GET /forecasts/gb-forecasts-list/
• POST /forecasts/run-simulation/

Updated fields:

• year fields in annual focus data objects
• repowering field in run_asset objects

No functional changes to endpoint behavior.

Removed

GB Modo Energy endpoints

2 endpoints removed along with their schema definitions.

Removed endpoints:

• GET /gb/modo/frequency/london
• GET /gb/modo/hourly-forward-curve

Removed schemas:

• BirminghamFrequency
• HourlyForwardCurve

Use alternative data sources for frequency and forward curve data.

Added

Solar export mode configuration

GET /forecasts/forecasts/

Returns forecast results with new solar_export_mode field in run_asset objects.

New response field:

• solar_export_mode (string, nullable) - Controls solar export behavior. Values: flexible, force_export, force_export_positive_prices

POST /forecasts/run-simulation/

Accepts new solar_export_mode parameter in run_asset configuration for simulation requests.

New request field:

• solar_export_mode (string, nullable) - Controls solar export behavior. Values: flexible, force_export, force_export_positive_prices