---
title: "Channels queries all the IBC channels of a chain."
method: GET
path: "/ibc/core/channel/v1/channels"
tags: ["Query"]
---

# Channels queries all the IBC channels of a chain.

`GET /ibc/core/channel/v1/channels`

## Request

- The document declares no server URL.
- Auth: none declared
- TypeScript: <https://skmtc.dev/coreumfoundation/apis/title-goes-here/docs/ibc/core/channel/v1/channels/get.ts> (a function with typed inputs; its response is checked against the schema)

## Query parameters

- `pagination.key` string, byte
- `pagination.offset` string, uint64
- `pagination.limit` string, uint64
- `pagination.count_total` boolean
- `pagination.reverse` boolean

## Response `200`

A successful response.

- IbcCoreChannelV1QueryChannelsResponse: QueryChannelsResponse is the response type for the Query/Channels RPC method.
  - `channels` IbcCoreChannelV1IdentifiedChannel[]: list of stored channels of the chain.
    - `state` 'STATE_UNINITIALIZED_UNSPECIFIED' | 'STATE_INIT' | 'STATE_TRYOPEN' | 'STATE_OPEN' | 'STATE_CLOSED' | 'STATE_FLUSHING' | 'STATE_FLUSHCOMPLETE': State defines if a channel is in one of the following states: CLOSED, INIT, TRYOPEN, OPEN, FLUSHING, FLUSHCOMPLETE or UNINITIALIZED. - STATE_UNINITIALIZED_UNSPECIFIED: Default State - STATE_INIT: A channel has just started the opening handshake. - STATE_TRYOPEN: A channel has acknowledged the handshake step on the counterparty chain. - STATE_OPEN: A channel has completed the handshake. Open channels are ready to send and receive packets. - STATE_CLOSED: A channel has been closed and can no longer be used to send or receive packets. - STATE_FLUSHING: A channel has just accepted the upgrade handshake attempt and is flushing in-flight packets. - STATE_FLUSHCOMPLETE: A channel has just completed flushing any in-flight packets.
    - `ordering` 'ORDER_NONE_UNSPECIFIED' | 'ORDER_UNORDERED' | 'ORDER_ORDERED': - ORDER_NONE_UNSPECIFIED: zero-value for channel ordering - ORDER_UNORDERED: packets can be delivered in any order, which may differ from the order in which they were sent. - ORDER_ORDERED: packets are delivered exactly in the order which they were sent
    - `counterparty` IbcCoreChannelV1Counterparty
      - `port_id` string: port on the counterparty chain which owns the other end of the channel.
      - `channel_id` string
    - `connection_hops` string[]
    - `version` string
    - `port_id` string
    - `channel_id` string
    - `upgrade_sequence` string, uint64
  - `pagination` CosmosBaseQueryV1beta1PageResponse: PageResponse is to be embedded in gRPC response messages where the corresponding request message has used PageRequest. message SomeResponse { repeated Bar results = 1; PageResponse page = 2; }
    - `next_key` string, byte: next_key is the key to be passed to PageRequest.key to query the next page most efficiently. It will be empty if there are no more results.
    - `total` string, uint64
  - `height` IbcCoreClientV1Height: Normally the RevisionHeight is incremented at each height while keeping RevisionNumber the same. However some consensus algorithms may choose to reset the height in certain conditions e.g. hard forks, state-machine breaking changes In these cases, the RevisionNumber is incremented so that height continues to be monitonically increasing even as the RevisionHeight gets reset
    - `revision_number` string, uint64
    - `revision_height` string, uint64

## Other responses

- `default`: An unexpected error response.

## Changes

- **2024-08-08** `785dbd465042`: 1 info
  - api operation id `GithubComCosmosIbcGoV7ModulesCore04ChannelTypesChannels` removed and replaced with `GithubComCosmosIbcGoV8ModulesCore04ChannelTypesChannels`
- **2023-09-11** `aaa274f20b71`: 1 info
  - api operation id `GithubComCosmosIbcGoV8ModulesCore04ChannelTypesChannels` removed and replaced with `GithubComCosmosIbcGoV7ModulesCore04ChannelTypesChannels`

[Operation history](https://skmtc.dev/coreumfoundation/apis/title-goes-here/changes/ibc/core/channel/v1/channels/get.md)

---

[API](https://skmtc.dev/coreumfoundation/apis/title-goes-here.md) - [All operations](https://skmtc.dev/coreumfoundation/apis/title-goes-here/llms.txt) - [OpenAPI document](https://skmtc.dev/coreumfoundation/apis/title-goes-here/revisions/2a2e5bc4593a?raw)