---
title: "Get public specifications about the aggregator"
method: GET
path: "/"
---

# Get public specifications about the aggregator

`GET /`

Returns the specifications related to the aggregator:
  * Open API version
  * URL of Mithril documentation
  * Capabilities of the aggregator
  * Cardano transactions prover capabilities

## Response `200`

root found

- AggregatorFeaturesMessage — Represents general information about Aggregator public information and signing capabilities
  - `open_api_version` string, byte, required — Open API version
  - `documentation_url` string, byte, required — Mithril documentation
  - `capabilities` object, required — Capabilities of the aggregator
    - `signed_entity_types` string[], required — Signed entity types that are signed by the aggregator
    - `aggregate_signature_type` 'Concatenation', required — Aggregate signature type used by the aggregator to create certificates
    - `cardano_transactions_prover` object — Cardano transactions prover capabilities
      - `max_hashes_allowed_by_request` integer, required — Maximum number of hashes allowed for a single request

## Other responses

- `default` — root error

## Changes

- **2025-09-16** `319c7ea7ecff` — 1 info
  - added the required property `capabilities/aggregate_signature_type` to the response with the `200` status
- **2025-06-13** `1b81bf42f34b` — 1 breaking, 1 warning, 2 info
  - removed the required property `capabilities/aggregate_signature_type` from the response with the `200` status
  - added the new `CardanoImmutableFilesFull` enum value to the `capabilities/signed_entity_types/items/` response property for the response status `200`
  - removed the `CardanoBlocksTransactions` enum value from the `capabilities/signed_entity_types/items/` response property for the response status `200`
  - removed the `CardanoDatabase` enum value from the `capabilities/signed_entity_types/items/` response property for the response status `200`

[Change history](https://skmtc.dev/input-output-hk/apis/mithril-aggregator-server/changes/get.md)

---

[API](https://skmtc.dev/input-output-hk/apis/mithril-aggregator-server.md) · [All operations](https://skmtc.dev/input-output-hk/apis/mithril-aggregator-server/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/input-output-hk/mithril-aggregator-server/revisions/e83d5e80c8fd/schema)