Ensure the deprecated endpoints get /strompreis, post /gesamtlast, get /gesamtlast_simple,
get /pvforecast to work on 1-hour intervalls even if the prediction provides 15-minutes
intervall data. This keeps the interface compliant to the legacy functionality.
Besides this adaptations several other improvements and fixes are included in this PR.
* feat: extend data management method key_to array by resample_method
One can now define the resample method on how to aggregate the values in an interval
for resampling. Three methods are provided:
- "first": Use the first value in each interval.
- "mean": Compute the arithmetic mean of all samples in each interval.
- "interval_mean": Compute the time-weighted mean assuming each value remains valid
until the next timestamp (piecewise-constant signal).
* feat: extend the get /v1/prediction/dataframe endpoint with resampling parameters
Make all parameters for resampling available at the endpoint.
* feat: extend the get /v1/prediction/list endpoint with resampling parameters
Make all parameters for resampling available at the endpoint.
* feat: add new delete /v1/prediction/range endpoint
The endpoint allows to delete prediction values for a given time span.
* fix: adapt for PVForecastAkkudoktor server side cache handling
/api.akkudoktor/forecast does it's own caching on requests. Call it with slightly
randomized request values to avoid getting cached values in the case we need fresh
data. The requests are anyway rate limited to one request per hour on our side.
* chore: add core.types
This module centralizes reusable type definitions shared across multiple
packages. Defining common types here avoids duplication of complex type
annotations (such as Literal aliases), ensures consistent typing across the
code base, and helps prevent circular import dependencies between modules.
* chore: extend cache testing
* chore: add system test for deprecated /strompreis endpoint
* chore: add unit test module for server endpoints
Add a new test module to do unit tests on server endpoints. First test added
for deprecated get /strompreis endpoint.
Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>
47 KiB
Akkudoktor-EOS
Version: v0.3.0.dev2607301181843779
Description: This project provides a comprehensive solution for simulating and optimizing an energy system based on renewable energy sources. With a focus on photovoltaic (PV) systems, battery storage (batteries), load management (consumer requirements), heat pumps, electric vehicles, and consideration of electricity price data, this system enables forecasting and optimization of energy flow and costs over a specified period.
Currency Information
All monetary values in this API are expressed in the locally configured currency of the EOS installation. The system is designed to work with any currency (e.g., EUR, SEK, CHF, USD, GBP, etc.). Each installation uses a single, consistent currency throughout all endpoints and responses.
Values are given in whole currency units, not in hundredth subunits: a value of 0.0003 in an installation configured for Euro means 0.0003 EUR/Wh (i.e. 0.30 EUR/kWh), never cents. The same applies to all totals (e.g. total_costs of 1.5 = 1.50 EUR).
Field names containing cost, price, revenue, tariff, or similar monetary terms (e.g., total_costs, electricity_price_per_wh, revenue_per_hour) represent amounts in the configured currency, without explicit currency designation in the field name to maintain currency-neutrality.
Deprecated Field Names
The genetic optimization API fields were renamed from German to English. For backward compatibility the old German field names (e.g. gesamtlast, pv_prognose_wh, Gesamtbilanz_Euro) are still accepted on input and are emitted in responses alongside the English names, marked as deprecated in the schema. They will be removed in a future release — new clients should use the English field names only.
Base URL: No base URL provided.
Endpoints:
POST /gesamtlast
Fastapi Gesamtlast
"""
Deprecated: Total Load Prediction with adjustment.
Endpoint to handle total load prediction adjusted by latest measured data.
Total load prediction starts at 00.00.00 today and is provided for 48 hours
in 1-hour intervals. If no prediction values are available the missing ones
at the start of the series are filled with the first available prediction value.
Note:
Use '/v1/prediction/list?key=loadforecast_power_w' instead.
Load energy meter readings to be added to EOS measurement by:
'/v1/measurement/value' or
'/v1/measurement/series' or
'/v1/measurement/dataframe' or
'/v1/measurement/data'
"""
Request Body:
application/json: { "$ref": "#/components/schemas/GesamtlastRequest" }
Responses:
-
200: Successful Response
-
422: Validation Error
GET /gesamtlast_simple
Fastapi Gesamtlast Simple
"""
Deprecated: Total Load Prediction.
Endpoint to handle total load prediction.
Total load prediction starts at 00.00.00 today and is provided for 48 hours
in 1-hour intervals. If no prediction values are available the missing ones
at the start of the series are filled with the first available prediction value.
Args:
year_energy (float): Yearly energy consumption in Wh.
Note:
Set LoadAkkudoktor as provider, then update data with
'/v1/prediction/update'
and then request data with
'/v1/prediction/list?key=loadforecast_power_w' instead.
"""
Parameters:
year_energy(query, required): No description provided.
Responses:
-
200: Successful Response
-
422: Validation Error
POST /optimize
Fastapi Optimize
"""
Deprecated: Optimize.
Endpoint to handle optimization.
Uses the `classic` GENETIC0 optimisation algorithm (__NO__ 15-minutes slots).
Note:
Use automatic optimization instead.
"v1/energy-management/optimization/solution/GENETIC0"
"""
Parameters:
-
start_hour(query, optional): Defaults to current hour of the day. -
ngen(query, optional): Number of indivuals to generate for genetic algorithm.
Request Body:
application/json: { "$ref": "#/components/schemas/Genetic0OptimizationParameters" }
Responses:
-
200: Successful Response
-
422: Validation Error
GET /pvforecast
Fastapi Pvforecast
"""
Deprecated: PV Forecast Prediction.
Endpoint to handle PV forecast prediction.
PVForecast starts at 00.00.00 today and is provided for 48 hours
in 1-hour intervals. If no forecast values are available the missing ones
at the start of the series are filled with the first available forecast value.
Note:
Set PVForecastAkkudoktor as provider, then update data with
'/v1/prediction/update'
and then request data with
'/v1/prediction/list?key=pvforecast_ac_power' and
'/v1/prediction/list?key=pvforecastakkudoktor_temp_air' instead.
"""
Responses:
- 200: Successful Response
GET /strompreis
Fastapi Strompreis
"""
Deprecated: Electricity Market Price Prediction per Wh [amount/Wh].
Electricity prices start at 00.00.00 today and are provided for 48 hours
in 1-hour intervals. If no prices are available the missing ones at the
start of the series are filled with the first available price.
Note:
Electricity price charges are added.
Note:
Set ElecPriceAkkudoktor as provider, then update data with
'/v1/prediction/update'
and then request data with
'/v1/prediction/list?key=elecprice_marketprice_wh' or
'/v1/prediction/list?key=elecprice_marketprice_kwh' instead.
"""
Responses:
- 200: Successful Response
GET /v1/admin/cache
Fastapi Admin Cache Get
"""
Current cache management data.
Returns:
data (dict): The management data.
"""
Responses:
- 200: Successful Response
POST /v1/admin/cache/clear
Fastapi Admin Cache Clear Post
"""
Clear the cache.
Deletes all cache files.
Returns:
data (dict): The management data after cleanup.
"""
Responses:
- 200: Successful Response
POST /v1/admin/cache/clear-expired
Fastapi Admin Cache Clear Expired Post
"""
Clear the cache from expired data.
Deletes expired cache files.
Returns:
data (dict): The management data after cleanup.
"""
Responses:
- 200: Successful Response
POST /v1/admin/cache/load
Fastapi Admin Cache Load Post
"""
Load cache management data.
Returns:
data (dict): The management data that was loaded.
"""
Responses:
- 200: Successful Response
POST /v1/admin/cache/save
Fastapi Admin Cache Save Post
"""
Save the current cache management data.
Returns:
data (dict): The management data that was saved.
"""
Responses:
- 200: Successful Response
POST /v1/admin/database/save
Fastapi Admin Database Save Post
"""
Save in memory data to database.
Returns:
data (dict): The database stats after saving the records.
"""
Responses:
- 200: Successful Response
GET /v1/admin/database/stats
Fastapi Admin Database Stats Get
"""
Get statistics from database.
Returns:
data (dict): The database statistics
"""
Responses:
- 200: Successful Response
POST /v1/admin/database/vacuum
Fastapi Admin Database Vacuum Post
"""
Remove old records from database.
Returns:
data (dict): The database stats after removal of old records.
"""
Responses:
- 200: Successful Response
POST /v1/admin/server/restart
Fastapi Admin Server Restart Post
"""
Restart the server.
Restart EOS properly by starting a new instance before exiting the old one.
"""
Responses:
- 200: Successful Response
POST /v1/admin/server/shutdown
Fastapi Admin Server Shutdown Post
"""
Shutdown the server.
"""
Responses:
- 200: Successful Response
GET /v1/config
Fastapi Config Get
"""
Get the current configuration.
Returns:
configuration (ConfigEOS): The current configuration.
"""
Responses:
- 200: Successful Response
PUT /v1/config
Fastapi Config Put
"""
Update the current config with the provided settings.
Note that for any setting value that is None or unset, the configuration will fall back to
values from other sources such as environment variables, the EOS configuration file, or default
values.
Args:
settings (SettingsEOS): The settings to write into the current settings.
Returns:
configuration (ConfigEOS): The current configuration after the write.
"""
Request Body:
application/json: { "$ref": "#/components/schemas/SettingsEOS" }
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/config/backup
Fastapi Config Backup Get
"""
Get the EOS configuration backup identifiers and backup metadata.
Returns:
dict[str, dict[str, Any]]: Mapping of backup identifiers to metadata.
"""
Responses:
- 200: Successful Response
PUT /v1/config/file
Fastapi Config File Put
"""
Save the current configuration to the EOS configuration file.
Returns:
configuration (ConfigEOS): The current configuration that was saved.
"""
Responses:
- 200: Successful Response
POST /v1/config/reset
Fastapi Config Reset Post
"""
Reset the configuration to the EOS configuration file.
Returns:
configuration (ConfigEOS): The current configuration after update.
"""
Responses:
- 200: Successful Response
PUT /v1/config/revert
Fastapi Config Revert Put
"""
Revert the configuration to a EOS configuration backup.
Returns:
configuration (ConfigEOS): The current configuration after revert.
"""
Parameters:
backup_id(query, required): EOS configuration backup ID.
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/config/{path}
Fastapi Config Get Key
"""
Get the value of a nested key or index in the config model.
Args:
path (str): The nested path to the key (e.g., "general/latitude" or "optimize/nested_list/0").
Returns:
value (Any): The value of the selected nested key.
"""
Parameters:
path(path, required): The nested path to the configuration key (e.g., general/latitude).
Responses:
-
200: Successful Response
-
422: Validation Error
PUT /v1/config/{path}
Fastapi Config Put Key
"""
Update a nested key or index in the config model.
Args:
path (str): The nested path to the key (e.g., "general/latitude" or "optimize/nested_list/0").
value (Any): The new value to assign to the key or index at path.
Returns:
configuration (ConfigEOS): The current configuration after the update.
"""
Parameters:
path(path, required): The nested path to the configuration key (e.g., general/latitude).
Request Body:
application/json: { "anyOf": [ {}, { "type": "null" } ], "description": "The value to assign to the specified configuration path (can be None).", "title": "Value" }
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/energy-management/optimization/solution
Fastapi Energy Management Optimization Solution Get
"""
Get the latest solution of the optimization.
"""
Responses:
- 200: Successful Response
GET /v1/energy-management/optimization/solution/{algorithm}
Fastapi Energy Management Optimization Solution Algorithm Get
"""
Get the latest algorithm specific solution of the optimization.
Args:
algorithm: Optimization algorithm
"""
Parameters:
algorithm(path, required): No description provided.
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/energy-management/plan
Fastapi Energy Management Plan Get
"""
Get the latest energy management plan.
"""
Responses:
- 200: Successful Response
GET /v1/health
Fastapi Health Get
"""
Health check endpoint to verify that the EOS server is alive.
"""
Responses:
- 200: Successful Response
GET /v1/logging/log
Fastapi Logging Get Log
"""
Get structured log entries from the EOS log file.
Filters and returns log entries based on the specified query parameters. The log
file is expected to contain newline-delimited JSON entries.
Args:
limit (int): Maximum number of entries to return.
level (Optional[str]): Filter logs by severity level (e.g., DEBUG, INFO).
contains (Optional[str]): Return only logs that include this string in the message.
regex (Optional[str]): Return logs that match this regular expression in the message.
from_time (Optional[str]): ISO 8601 timestamp to filter logs not older than this.
to_time (Optional[str]): ISO 8601 timestamp to filter logs not newer than this.
tail (bool): If True, fetch the most recent log entries (like `tail`).
Returns:
JSONResponse: A JSON list of log entries.
"""
Parameters:
-
limit(query, optional): Maximum number of log entries to return. -
level(query, optional): Filter by log level (e.g., INFO, ERROR). -
contains(query, optional): Filter logs containing this substring. -
regex(query, optional): Filter logs by matching regex in message. -
from_time(query, optional): Start time (ISO format) for filtering logs. -
to_time(query, optional): End time (ISO format) for filtering logs. -
tail(query, optional): If True, returns the most recent lines (tail mode).
Responses:
-
200: Successful Response
-
422: Validation Error
PUT /v1/measurement/data
Fastapi Measurement Data Put
"""
Merge the measurement data given as datetime data into EOS measurements.
"""
Request Body:
application/json: { "$ref": "#/components/schemas/PydanticDateTimeData" }
Responses:
-
200: Successful Response
-
422: Validation Error
PUT /v1/measurement/dataframe
Fastapi Measurement Dataframe Put
"""
Merge the measurement data given as dataframe into EOS measurements.
"""
Request Body:
application/json: { "$ref": "#/components/schemas/PydanticDateTimeDataFrame" }
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/measurement/keys
Fastapi Measurement Keys Get
Responses:
- 200: Successful Response
DELETE /v1/measurement/range
Fastapi Measurement Range Delete
"""
Delete measurement values for a key within a datetime range.
"""
Parameters:
-
key(query, required): Measurement key. -
start_datetime(query, optional): Start datetime. -
end_datetime(query, optional): End datetime.
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/measurement/series
Fastapi Measurement Series Get
"""
Get the measurements of given key as series.
"""
Parameters:
key(query, required): Measurement key.
Responses:
-
200: Successful Response
-
422: Validation Error
PUT /v1/measurement/series
Fastapi Measurement Series Put
"""
Merge measurement given as series into given key.
"""
Parameters:
key(query, required): Measurement key.
Request Body:
application/json: { "$ref": "#/components/schemas/PydanticDateTimeSeries" }
Responses:
-
200: Successful Response
-
422: Validation Error
PUT /v1/measurement/value
Fastapi Measurement Value Put
"""
Merge the measurement of given key and value into EOS measurements at given datetime.
"""
Parameters:
-
datetime(query, required): Datetime. -
key(query, required): Measurement key. -
value(query, required): No description provided.
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/prediction/dataframe
Fastapi Prediction Dataframe Get
"""
Get prediction for given keys within given date range as dataframe.
Args:
key (list[str]): Prediction keys
start_datetime (Optional[str]): Starting datetime (inclusive).
Defaults to start datetime of latest prediction.
end_datetime (Optional[str]: Ending datetime (exclusive).
Defaults to end datetime of latest prediction.
interval (Optional[str]): Time duration for each interval.
Defaults to 1 hour.
fill_method (str): Method to handle missing values during resampling.
- 'linear': Linearly interpolate missing values (for numeric data only).
- 'time': Interpolate missing values (for numeric data only).
- 'ffill': Forward fill missing values.
- 'bfill': Backward fill missing values.
- Defaults to 'linear' for numeric values, otherwise 'ffill'.
resample_method (str):
Method used to aggregate values within a resampling interval.
- "first": Use the first value in each interval.
- "mean": Compute the arithmetic mean of all samples in each interval.
- "interval_mean": Compute the time-weighted mean assuming each
value remains valid until the next timestamp (piecewise-constant
signal).
dropna: (bool, optional): Whether to drop NAN/ None values before processing.
Defaults to True.
boundary (Literal["strict", "context"]): resampling boundary
"strict" → only values inside [start, end)
"context" → include one value before and after for proper resampling
align_to_interval (bool): When True, snap the resample origin to the nearest
UTC epoch-aligned boundary of ``interval`` before resampling. This ensures
that bucket timestamps always fall on wall-clock-round times regardless of
when ``start_datetime`` falls:
- 15-minute interval → buckets on :00, :15, :30, :45
- 1-hour interval → buckets on the hour
When False (default), the origin is ``query_start`` (or ``"start_day"`` when
no start is given), preserving the existing behaviour where buckets are
aligned to the query window rather than the clock.
Set to True when storing compacted records back to the database so that the
resulting timestamps are predictable and human-readable. Leave False for
forecast or reporting queries where alignment to the exact query window is
more important than clock-round boundaries.
"""
Parameters:
-
keys(query, required): Prediction keys. -
start_datetime(query, optional): Starting datetime (inclusive). -
end_datetime(query, optional): Ending datetime (exclusive). -
interval(query, optional): Time duration for each interval. Defaults to 1 hour. -
fill_method(query, optional): Method to handle missing values during resampling. -
resample_method(query, optional): Method used to aggregate values within a resampling interval. -
dropna(query, optional): Drop NAN/ None values before processing. -
boundary(query, optional): Resampling boundary mode. -
align_to_interval(query, optional): Snap resample origin to the nearest UTC epoch-aligned boundary of interval.
Responses:
-
200: Successful Response
-
422: Validation Error
PUT /v1/prediction/import/{provider_id}
Fastapi Prediction Import Provider
"""
Import prediction for given provider ID.
Args:
provider_id: ID of provider to update.
data: Prediction data.
force_enable: Update data even if provider is disabled.
Defaults to False.
"""
Parameters:
-
provider_id(path, required): Provider ID. -
force_enable(query, optional): No description provided.
Request Body:
application/json: { "anyOf": [ { "$ref": "#/components/schemas/PydanticDateTimeDataFrame" }, { "$ref": "#/components/schemas/PydanticDateTimeData" }, { "type": "object", "additionalProperties": true }, { "type": "null" } ], "title": "Data" }
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/prediction/keys
Fastapi Prediction Keys Get
"""
Get a list of available prediction keys.
"""
Responses:
- 200: Successful Response
GET /v1/prediction/list
Fastapi Prediction List Get
"""
Get prediction for given key within given date range as value list.
Args:
key (str): Prediction key
start_datetime (Optional[str]): Starting datetime (inclusive).
Defaults to start datetime of latest prediction.
end_datetime (Optional[str]: Ending datetime (exclusive).
Defaults to end datetime of latest prediction.
interval (Optional[str]): Time duration for each interval.
Defaults to 1 hour.
fill_method (str): Method to handle missing values during resampling.
- 'linear': Linearly interpolate missing values (for numeric data only).
- 'time': Interpolate missing values (for numeric data only).
- 'ffill': Forward fill missing values.
- 'bfill': Backward fill missing values.
- Defaults to 'linear' for numeric values, otherwise 'ffill'.
resample_method (str):
Method used to aggregate values within a resampling interval.
- "first": Use the first value in each interval.
- "mean": Compute the arithmetic mean of all samples in each interval.
- "interval_mean": Compute the time-weighted mean assuming each
value remains valid until the next timestamp (piecewise-constant
signal).
dropna: (bool, optional): Whether to drop NAN/ None values before processing.
Defaults to True.
boundary (Literal["strict", "context"]): resampling boundary
"strict" → only values inside [start, end)
"context" → include one value before and after for proper resampling
align_to_interval (bool): When True, snap the resample origin to the nearest
UTC epoch-aligned boundary of ``interval`` before resampling. This ensures
that bucket timestamps always fall on wall-clock-round times regardless of
when ``start_datetime`` falls:
- 15-minute interval → buckets on :00, :15, :30, :45
- 1-hour interval → buckets on the hour
When False (default), the origin is ``query_start`` (or ``"start_day"`` when
no start is given), preserving the existing behaviour where buckets are
aligned to the query window rather than the clock.
Set to True when storing compacted records back to the database so that the
resulting timestamps are predictable and human-readable. Leave False for
forecast or reporting queries where alignment to the exact query window is
more important than clock-round boundaries.
"""
Parameters:
-
key(query, required): Prediction key. -
start_datetime(query, optional): Starting datetime (inclusive). -
end_datetime(query, optional): Ending datetime (exclusive). -
interval(query, optional): Time duration for each interval. Defaults to 1 hour. -
fill_method(query, optional): Method to handle missing values during resampling. -
resample_method(query, optional): Method used to aggregate values within a resampling interval. -
dropna(query, optional): Drop NAN/ None values before processing. -
boundary(query, optional): Resampling boundary mode. -
align_to_interval(query, optional): Snap resample origin to the nearest UTC epoch-aligned boundary of interval.
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/prediction/providers
Fastapi Prediction Providers Get
"""
Get a list of available prediction providers.
Args:
enabled (bool): Return enabled/disabled providers. If unset, return all providers.
"""
Parameters:
enabled(query, optional): No description provided.
Responses:
-
200: Successful Response
-
422: Validation Error
DELETE /v1/prediction/range
Fastapi Prediction Range Delete
"""
Delete prediction values for a key within a datetime range.
"""
Parameters:
-
key(query, required): Prediction key. -
start_datetime(query, optional): Start datetime. -
end_datetime(query, optional): End datetime.
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/prediction/series
Fastapi Prediction Series Get
"""
Get prediction for given key within given date range as series.
Args:
key (str): Prediction key
start_datetime (Optional[str]): Starting datetime (inclusive).
Defaults to start datetime of latest prediction.
end_datetime (Optional[str]: Ending datetime (exclusive).
Defaults to end datetime of latest prediction.
"""
Parameters:
-
key(query, required): Prediction key. -
start_datetime(query, optional): Starting datetime (inclusive). -
end_datetime(query, optional): Ending datetime (exclusive).
Responses:
-
200: Successful Response
-
422: Validation Error
POST /v1/prediction/update
Fastapi Prediction Update
"""
Update predictions for all providers.
Args:
force_update: Update data even if it is already cached.
Defaults to False.
force_enable: Update data even if provider is disabled.
Defaults to False.
"""
Parameters:
-
force_update(query, optional): No description provided. -
force_enable(query, optional): No description provided.
Responses:
-
200: Successful Response
-
422: Validation Error
POST /v1/prediction/update/{provider_id}
Fastapi Prediction Update Provider
"""
Update predictions for given provider ID.
Args:
provider_id: ID of provider to update.
force_update: Update data even if it is already cached.
Defaults to False.
force_enable: Update data even if provider is disabled.
Defaults to False.
"""
Parameters:
-
provider_id(path, required): No description provided. -
force_update(query, optional): No description provided. -
force_enable(query, optional): No description provided.
Responses:
-
200: Successful Response
-
422: Validation Error
GET /v1/resource/status
Fastapi Devices Status Get
"""
Get the latest status of a resource/ device.
Return:
latest_status: The latest status of a resource/ device.
"""
Parameters:
-
resource_id(query, required): Resource ID. -
actuator_id(query, optional): Actuator ID.
Responses:
-
200: Successful Response
-
422: Validation Error
PUT /v1/resource/status
Fastapi Devices Status Put
"""
Update the status of a resource/ device.
Return:
latest_status: The latest status of a resource/ device.
"""
Parameters:
-
resource_id(query, required): Resource ID. -
actuator_id(query, optional): Actuator ID.
Request Body:
application/json: { "anyOf": [ { "$ref": "#/components/schemas/PowerMeasurement" }, { "$ref": "#/components/schemas/EnergyMeasurement" }, { "$ref": "#/components/schemas/PPBCPowerProfileStatus" }, { "$ref": "#/components/schemas/OMBCStatus" }, { "$ref": "#/components/schemas/FRBCActuatorStatus" }, { "$ref": "#/components/schemas/FRBCEnergyStatus" }, { "$ref": "#/components/schemas/FRBCStorageStatus" }, { "$ref": "#/components/schemas/FRBCTimerStatus" }, { "$ref": "#/components/schemas/DDBCActuatorStatus" } ], "description": "Resource Status.", "title": "Status" }
Responses:
-
200: Successful Response
-
422: Validation Error
GET /visualization_results.pdf
Get Pdf
Responses:
- 200: Successful Response
Auto generated from openapi.json.