---
title: "Instance types available in a region (free)."
method: GET
path: "/v1/instances"
tags: ["discovery"]
---

# Instance types available in a region (free).

`GET /v1/instances`

## Request

- Base URL: `https://cloud.trycorpus.ai`
- URL: `https://cloud.trycorpus.ai/v1/instances`
- Auth: none required

Exact type names with per-type coverage: raw events (`events`, `first_event`, `last_event`; zero/null for types that only exist in the legacy history) and legacy history ranges (`history_daily_from/to`, `history_monthly_from/to`). Optional `prefix` narrows the list (for example `c5.` or `n2-`).

## Query parameters

- `provider` 'aws' | 'gcp' | 'azure', required
- `region` string, required
- `prefix` string

## Response `200`

Instance list.

- InstanceList
  - `provider` string
  - `region` string
  - `count` integer
  - `instances` object[]
    - `instance` string
    - `events` integer: Raw events; 0 for legacy-only types.
    - `first_event` string, date-time, nullable
    - `last_event` string, date-time, nullable
    - `history_daily_from` string, date, nullable
    - `history_daily_to` string, date, nullable
    - `history_monthly_from` string, date, nullable
    - `history_monthly_to` string, date, nullable

## Other responses

- `400`: Invalid or missing parameter.
- `404`: Unknown provider, region or instance type.
- `503`: The store is still warming up after a restart; retry in a minute. No payment is taken.

---

[API](https://skmtc.dev/trycorpus/apis/corpusai-cloud-pricing-api.md) · [All operations](https://skmtc.dev/trycorpus/apis/corpusai-cloud-pricing-api/llms.txt) · [OpenAPI document](https://skmtc.dev/trycorpus/apis/corpusai-cloud-pricing-api/revisions/cb0754f4d151?raw)