# Operations
> List all possible operations, formats, engines and possible options.
## List operations
List all possible operations, formats, engines and possible options.
[https://api.cloudconvert.com/v2/operations](https://api.cloudconvert.com/v2/operations)
#### Query Parameters
The result will be filtered to include only possible operations with a matching operation name (e.g. `convert` or `optimize`).
The result will be filtered to include only possible conversions with a matching input format.
The result will be filtered to include only possible conversions with a matching output format.
Filter result to only include conversions with a matching engine name.
Filter result to only include conversions with a matching engine version.
For some formats multiple alternative engines are available. If set to `true`, the result includes these alternative conversion types. Defaults to `false`.
Include `options` and/or `engine_versions` in the result. Use `options.details` to get the options including details for building user interfaces, such as labels, value ranges and descriptions of the possible values. We recommend to set `options,options.details` in this case.
#### Response
The list of possible conversion types:
Name of the operation, such as `convert`, `optimize` or `capture-website`.
Format of the input file.
Format of the conversion result.
Name of the engine.
The base amount of conversion credits this operation consumes.
Possible options for this conversion type. Available, if the include argument contains `options`.
Name of the option.
Data type of the option: `string`, `boolean`, `integer`, `float`, `enum` or `dictionary`.
Default value.
Description of the option.
Possible values if the data type is `enum`.
Human-readable name of the option. Only available, if the include argument contains `options.details`. This applies to all following attributes as well. All of them are optional and more attributes might be added in the future.
Category of the option, such as `video`, `audio` or `watermark`.
`true` for rarely needed options. User interfaces might hide them by default.
The option only has an effect if all of these conditions are met. Each condition has a list of `options` and either `in` (any of the options has one of these values), `not_in` (none of the options has one of these values), `set: true` (any of the options is set) or `set: false` (none of the options is set, as they override this option). Unset options count with their default value. This is a recommendation for user interfaces and is not enforced when creating tasks.
Recommended minimum value for `integer` and `float` options. `min`, `max` and `step` are recommendations for user interfaces and are not enforced when creating tasks.
Recommended maximum value.
Recommended step size.
Unit of the value, such as `px`, `%` or `dpi`.
Notable values of `integer` and `float` options. Each mark has a `value` and a `label`.
Common values of `string` options. Other values are allowed as well.
Details about the `possible_values` of `enum` options. Each entry has a `value` and optionally a `label` and a `description`.
Compatible engine versions for this conversion type. Available, if the include argument contains `engine_versions`.
Version of the engine.
This is the default version.
This version is the latest one.
This version is deprecated.
This version is experimental.
This format is deprecated.
This format is experimental.
Meta attributes.