---
title: "UpdateConnectionParams defines a rpc handler method for MsgUpdateParams."
method: POST
path: "/ibc.core.connection.v1.Msg/UpdateConnectionParams"
tags: ["Msg"]
---

# UpdateConnectionParams defines a rpc handler method for MsgUpdateParams.

`POST /ibc.core.connection.v1.Msg/UpdateConnectionParams`

## Request body

- IbcCoreConnectionV1MsgUpdateParams — MsgUpdateParams defines the sdk.Msg type to update the connection parameters.
  - `params` IbcCoreConnectionV1Params — Params defines the set of Connection parameters.
    - `max_expected_time_per_block` string, uint64 — maximum expected time per block (in nanoseconds), used to enforce block delay. This parameter should reflect the largest amount of time that the chain might reasonably take to produce the next block under normal operating conditions. A safe choice is 3-5x the expected time per block.
  - `signer` string

## Response `200`

A successful response.

- IbcCoreConnectionV1MsgUpdateParamsResponse — MsgUpdateParamsResponse defines the MsgUpdateParams response type.

## Other responses

- `default` — An unexpected error response.

## Changes

- **2025-03-27** `4f349536c8f3` — 1 info
  - endpoint added
- **2025-02-24** `2ab9d24288c2` — 1 breaking
  - api path removed without deprecation
- **2024-08-14** `21c607e4fa20` — 1 info
  - api operation id `IbcCoreConnectionV1Msg_UpdateConnectionParams` removed and replaced with `FeeMsg_UpdateConnectionParams`
- **2024-02-23** `54713b4a9d25` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/pokt-network/apis/http-api-console/changes/ibc.core.connection.v1.Msg/UpdateConnectionParams/post.md)

---

[API](https://skmtc.dev/pokt-network/apis/http-api-console.md) · [All operations](https://skmtc.dev/pokt-network/apis/http-api-console/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/pokt-network/http-api-console/revisions/4f349536c8f3/schema)