diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a630e871de51..938144e8db7c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -94,7 +94,7 @@ All PRs require two Reviews before merge (except docs changes, or variable name-
 If you open a PR on the Cosmos SDK, it is mandatory to update the relevant documentation in /docs.
 
 - If your change relates to the core SDK (baseapp, store, ...), please update the `docs/basics/`, `docs/core/` and/or `docs/building-modules/` folders.
-- If your changes relate to the core of the CLI or Light-client (not specifically to module's CLI/Rest), please modify the `docs/interfaces/` folder.
+- If your changes relate to the core of the CLI (not specifically to module's CLI/Rest), please modify the `docs/run-node/` folder.
 - If your changes relate to a module, please update the module's spec in `x/moduleName/docs/spec/`.
 
 When writing documentation, follow the [Documentation Writing Guidelines](./docs/DOC_WRITING_GUIDELINES.md).
diff --git a/docs/DOCS_README.md b/docs/DOCS_README.md
index a94668647e5d..2e080fc53dbc 100644
--- a/docs/DOCS_README.md
+++ b/docs/DOCS_README.md
@@ -6,7 +6,7 @@ If you want to open a PR on the Cosmos SDK to update the documentation, please f
 
 - Docs translations live in a `docs/country-code/` folder, where `country-code` stands for the country code of the language used (`cn` for Chinese, `kr` for Korea, `fr` for France, ...).
 - Always translate content living on `master`.
-- Only content under `/docs/intro/`, `/docs/basics/`, `/docs/core/`, `/docs/building-modules/` and `docs/interfaces` needs to be translated, as well as `docs/README.md`. It is also nice (but not mandatory) to translate `/docs/spec/`.
+- Only content under `/docs/intro/`, `/docs/basics/`, `/docs/core/`, `/docs/building-modules/` and `docs/run-node/` needs to be translated, as well as `docs/README.md`. It is also nice (but not mandatory) to translate `/docs/spec/`.
 - Specify the release/tag of the translation in the README of your translation folder. Update the release/tag each time you update the translation.
 
 ## Docs Build Workflow
diff --git a/docs/README.md b/docs/README.md
index 0a81978d36af..d3caf5497404 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -19,10 +19,10 @@ sections:
     desc: Discover how to build modules for the Cosmos SDK.
     icon: modules
     url: /building-modules/intro.html
-  - title: Interfaces
-    desc: Build interfaces for Cosmos SDK applications.
+  - title: Running a Node
+    desc: Running and interacting with nodes using the CLI and API.
     icon: interfaces
-    url: /interfaces/interfaces-intro.html
+    url: /run-node/
   - title: Modules
     desc: Explore existing modules to build your application with.
     icon: specifications
diff --git a/docs/basics/app-anatomy.md b/docs/basics/app-anatomy.md
index a939be7d24cc..0373d24aafa5 100644
--- a/docs/basics/app-anatomy.md
+++ b/docs/basics/app-anatomy.md
@@ -225,9 +225,9 @@ These Legacy API endpoints are present in the SDK for backward compatibility pur
 
 ## Application Interface
 
-[Interfaces](../interfaces/interfaces-intro.md) let end-users interact with full-node clients. This means querying data from the full-node or creating and sending new transactions to be relayed by the full-node and eventually included in a block.
+[Interfaces](#command-line-grpc-services-and-rest-interfaces) let end-users interact with full-node clients. This means querying data from the full-node or creating and sending new transactions to be relayed by the full-node and eventually included in a block.
 
-The main interface is the [Command-Line Interface](../interfaces/cli.md). The CLI of an SDK application is built by aggregating [CLI commands](#cli) defined in each of the modules used by the application. The CLI of an application is the same as the daemon (e.g. `appd`), and defined in a file called `appd/main.go`. The file contains:
+The main interface is the [Command-Line Interface](../core/cli.md). The CLI of an SDK application is built by aggregating [CLI commands](#cli) defined in each of the modules used by the application. The CLI of an application is the same as the daemon (e.g. `appd`), and defined in a file called `appd/main.go`. The file contains:
 
 - **A `main()` function**, which is executed to build the `appd` interface client. This function prepares each command and adds them to the `rootCmd` before building them. At the root of `appd`, the function adds generic commands like `status`, `keys` and `config`, query commands, tx commands and `rest-server`.
 - **Query commands** are added by calling the `queryCmd` function. This function returns a Cobra command that contains the query commands defined in each of the application's modules (passed as an array of `sdk.ModuleClients` from the `main()` function), as well as some other lower level query commands such as block or validator queries. Query command are called by using the command `appd query [query]` of the CLI.
diff --git a/docs/basics/tx-lifecycle.md b/docs/basics/tx-lifecycle.md
index bded880acd3b..7828db6c3ab1 100644
--- a/docs/basics/tx-lifecycle.md
+++ b/docs/basics/tx-lifecycle.md
@@ -14,7 +14,7 @@ This document describes the lifecycle of a transaction from creation to committe
 
 ### Transaction Creation
 
-One of the main application interfaces is the command-line interface. The transaction `Tx` can be created by the user inputting a command in the following format from the [command-line](../interfaces/cli.md), providing the type of transaction in `[command]`, arguments in `[args]`, and configurations such as gas prices in `[flags]`:
+One of the main application interfaces is the command-line interface. The transaction `Tx` can be created by the user inputting a command in the following format from the [command-line](../core/cli.md), providing the type of transaction in `[command]`, arguments in `[args]`, and configurations such as gas prices in `[flags]`:
 
 ```bash
 [appname] tx [command] [args] [flags]
@@ -26,7 +26,7 @@ There are several required and optional flags for transaction creation. The `--f
 
 #### Gas and Fees
 
-Additionally, there are several [flags](../interfaces/cli.md) users can use to indicate how much they are willing to pay in [fees](./gas-fees.md):
+Additionally, there are several [flags](../core/cli.md) users can use to indicate how much they are willing to pay in [fees](./gas-fees.md):
 
 - `--gas` refers to how much [gas](./gas-fees.md), which represents computational resources, `Tx` consumes. Gas is dependent on the transaction and is not precisely calculated until execution, but can be estimated by providing `auto` as the value for `--gas`.
 - `--gas-adjustment` (optional) can be used to scale `gas` up in order to avoid underestimating. For example, users can specify their gas adjustment as 1.5 to use 1.5 times the estimated gas.
@@ -48,7 +48,7 @@ appd tx send <recipientAddress> 1000uatom --from <senderAddress> --gas auto --ga
 
 #### Other Transaction Creation Methods
 
-The command-line is an easy way to interact with an application, but `Tx` can also be created using a [REST interface](../interfaces/rest.md) or some other entrypoint defined by the application developer. From the user's perspective, the interaction depends on the web interface or wallet they are using (e.g. creating `Tx` using [Lunie.io](https://lunie.io/#/) and signing it with a Ledger Nano S).
+The command-line is an easy way to interact with an application, but `Tx` can also be created using a [gRPC or REST interface](../core/grpc_rest.md) or some other entrypoint defined by the application developer. From the user's perspective, the interaction depends on the web interface or wallet they are using (e.g. creating `Tx` using [Lunie.io](https://lunie.io/#/) and signing it with a Ledger Nano S).
 
 ## Addition to Mempool
 
diff --git a/docs/building-modules/errors.md b/docs/building-modules/errors.md
index eb527c36d01a..d1bc36824562 100644
--- a/docs/building-modules/errors.md
+++ b/docs/building-modules/errors.md
@@ -48,7 +48,3 @@ an error is of a particular kind via `Is`.
 If a module error is registered, the SDK `errors` package allows ABCI information to be extracted
 through the `ABCIInfo` API. The package also provides `ResponseCheckTx` and `ResponseDeliverTx` as
 auxiliary APIs to automatically get `CheckTx` and `DeliverTx` responses from an error.
-
-## Next {hide}
-
-Learn about [interfaces](../interfaces/interfaces-intro.md) {hide}
diff --git a/docs/building-modules/messages-and-queries.md b/docs/building-modules/messages-and-queries.md
index 67ba7477b5b2..3481939673b6 100644
--- a/docs/building-modules/messages-and-queries.md
+++ b/docs/building-modules/messages-and-queries.md
@@ -65,7 +65,7 @@ See an example implementation of a `message` from the `gov` module:
 
 ## Queries
 
-A `query` is a request for information made by end-users of applications through an interface and processed by a full-node. A `query` is received by a full-node through its consensus engine and relayed to the application via the ABCI. It is then routed to the appropriate module via `BaseApp`'s `queryrouter` so that it can be processed by the module's query service (./query-services.md). For a deeper look at the lifecycle of a `query`, click [here](../interfaces/query-lifecycle.md).
+A `query` is a request for information made by end-users of applications through an interface and processed by a full-node. A `query` is received by a full-node through its consensus engine and relayed to the application via the ABCI. It is then routed to the appropriate module via `BaseApp`'s `queryrouter` so that it can be processed by the module's query service (./query-services.md). For a deeper look at the lifecycle of a `query`, click [here](../basics/query-lifecycle.md).
 
 ### gRPC Queries
 
diff --git a/docs/building-modules/module-interfaces.md b/docs/building-modules/module-interfaces.md
index 8a773a4de81c..c033db6635a5 100644
--- a/docs/building-modules/module-interfaces.md
+++ b/docs/building-modules/module-interfaces.md
@@ -12,7 +12,7 @@ This document details how to build CLI and REST interfaces for a module. Example
 
 ## CLI
 
-One of the main interfaces for an application is the [command-line interface](../interfaces/cli.md). This entrypoint adds commands from the application's modules enabling end-users to create [**messages**](./messages-and-queries.md#messages) wrapped in transactions and [**queries**](./messages-and-queries.md#queries). The CLI files are typically found in the module's `./client/cli` folder.
+One of the main interfaces for an application is the [command-line interface](../core/cli.md). This entrypoint adds commands from the application's modules enabling end-users to create [**messages**](./messages-and-queries.md#messages) wrapped in transactions and [**queries**](./messages-and-queries.md#queries). The CLI files are typically found in the module's `./client/cli` folder.
 
 ### Transaction Commands
 
diff --git a/docs/building-modules/module-manager.md b/docs/building-modules/module-manager.md
index 1b2439508783..334d252e6188 100644
--- a/docs/building-modules/module-manager.md
+++ b/docs/building-modules/module-manager.md
@@ -38,7 +38,7 @@ Let us go through the methods:
 - `RegisterInterfaces(codectypes.InterfaceRegistry)`: Registers a module's interface types and their concrete implementations as `proto.Message`.
 - `DefaultGenesis(codec.JSONCodec)`: Returns a default [`GenesisState`](./genesis.md#genesisstate) for the module, marshalled to `json.RawMessage`. The default `GenesisState` need to be defined by the module developer and is primarily used for testing.
 - `ValidateGenesis(codec.JSONCodec, client.TxEncodingConfig, json.RawMessage)`: Used to validate the `GenesisState` defined by a module, given in its `json.RawMessage` form. It will usually unmarshall the `json` before running a custom [`ValidateGenesis`](./genesis.md#validategenesis) function defined by the module developer.
-- `RegisterRESTRoutes(client.Context, *mux.Router)`: Registers the REST routes for the module. These routes will be used to map REST request to the module in order to process them. See [../interfaces/rest.md] for more.
+- `RegisterRESTRoutes(client.Context, *mux.Router)`: Registers the REST routes for the module. These routes will be used to map REST request to the module in order to process them. See [gRPC and REST](../core/grpc_rest.md) for more.
 - `RegisterGRPCGatewayRoutes(client.Context, *runtime.ServeMux)`: Registers gRPC routes for the module.
 - `GetTxCmd()`: Returns the root [`Tx` command](./module-interfaces.md#tx) for the module. The subcommands of this root command are used by end-users to generate new transactions containing [`message`s](./messages-and-queries.md#queries) defined in the module.
 - `GetQueryCmd()`: Return the root [`query` command](./module-interfaces.md#query) for the module. The subcommands of this root command are used by end-users to generate new queries to the subset of the state defined by the module.
@@ -115,10 +115,10 @@ It implements the following methods:
 - `RegisterInterfaces(registry codectypes.InterfaceRegistry)`: Registers interface types and implementations of each of the application's `AppModuleBasic`.
 - `DefaultGenesis(cdc codec.JSONCodec)`: Provides default genesis information for modules in the application by calling the [`DefaultGenesis(cdc codec.JSONCodec)`](./genesis.md#defaultgenesis) function of each module. It is used to construct a default genesis file for the application.
 - `ValidateGenesis(cdc codec.JSONCodec, txEncCfg client.TxEncodingConfig, genesis map[string]json.RawMessage)`: Validates the genesis information modules by calling the [`ValidateGenesis(codec.JSONCodec, client.TxEncodingConfig, json.RawMessage)`](./genesis.md#validategenesis) function of each module.
-- `RegisterRESTRoutes(ctx client.Context, rtr *mux.Router)`: Registers REST routes for modules by calling the [`RegisterRESTRoutes`](./module-interfaces.md#register-routes) function of each module. This function is usually called function from the `main.go` function of the [application's command-line interface](../interfaces/cli.md).
+- `RegisterRESTRoutes(ctx client.Context, rtr *mux.Router)`: Registers REST routes for modules by calling the [`RegisterRESTRoutes`](./module-interfaces.md#register-routes) function of each module. This function is usually called function from the `main.go` function of the [application's command-line interface](../core/cli.md).
 - `RegisterGRPCGatewayRoutes(clientCtx client.Context, rtr *runtime.ServeMux)`: Registers gRPC routes for modules.
-- `AddTxCommands(rootTxCmd *cobra.Command)`: Adds modules' transaction commands to the application's [`rootTxCommand`](../interfaces/cli.md#transaction-commands). This function is usually called function from the `main.go` function of the [application's command-line interface](../interfaces/cli.md).
-- `AddQueryCommands(rootQueryCmd *cobra.Command)`: Adds modules' query commands to the application's [`rootQueryCommand`](../interfaces/cli.md#query-commands). This function is usually called function from the `main.go` function of the [application's command-line interface](../interfaces/cli.md).
+- `AddTxCommands(rootTxCmd *cobra.Command)`: Adds modules' transaction commands to the application's [`rootTxCommand`](../core/cli.md#transaction-commands). This function is usually called function from the `main.go` function of the [application's command-line interface](../core/cli.md).
+- `AddQueryCommands(rootQueryCmd *cobra.Command)`: Adds modules' query commands to the application's [`rootQueryCommand`](../core/cli.md#query-commands). This function is usually called function from the `main.go` function of the [application's command-line interface](../core/cli.md).
 
 ### `Manager`
 
diff --git a/docs/building-modules/query-services.md b/docs/building-modules/query-services.md
index a035b6f030cd..4113e099efe0 100644
--- a/docs/building-modules/query-services.md
+++ b/docs/building-modules/query-services.md
@@ -66,7 +66,7 @@ func NewQuerier(keeper Keeper) sdk.Querier {
 }
 ```
 
-This simple switch returns a `querier` function specific to the type of the received `query`. At this point of the [query lifecycle](../interfaces/query-lifecycle.md), the first element of the `path` (`path[0]`) contains the type of the query. The following elements are either empty or contain arguments needed to process the query.
+This simple switch returns a `querier` function specific to the type of the received `query`. At this point of the [query lifecycle](../basics/query-lifecycle.md), the first element of the `path` (`path[0]`) contains the type of the query. The following elements are either empty or contain arguments needed to process the query.
 
 The `querier` functions themselves are pretty straighforward. They generally fetch a value or values from the state using the [`keeper`](./keeper.md). Then, they marshall the value(s) using the [`codec`](../core/encoding.md) and return the `[]byte` obtained as result.
 
diff --git a/docs/cn/README.md b/docs/cn/README.md
index fc5974742396..195a513a83dc 100644
--- a/docs/cn/README.md
+++ b/docs/cn/README.md
@@ -21,7 +21,7 @@ This documentation is not complete and it's outdated. Please use the English ver
 - **[基础文档](./basics/)**：cosmos sdk 的基础概念文档，例如应用结构、交易的生命周期、账户管理等
 - **[核心文档](./core/)**: cosmos sdk 的核心文档，例如`baseapp`，`store`，`server`等
 - **[构建模块](./building-modules/)**: 对于模块开发者来说的一些重要概念，例如`message`，`keeper`，`handler`，`querier`
-- **[接口](./interfaces/)**: 为 cosmos 应用设计接口的文档
+- **[接口](./run-node/)**: 为 cosmos 应用设计接口的文档
 
 ## 开发资源
 
diff --git a/docs/cn/basics/accounts.md b/docs/cn/basics/accounts.md
index c37e45aa69b7..e6d5cce4fa67 100644
--- a/docs/cn/basics/accounts.md
+++ b/docs/cn/basics/accounts.md
@@ -77,7 +77,7 @@ Cosmos SDK 使用一套称之为 [BIP32](https://github.com/bitcoin/bips/blob/ma
 
 +++ https://github.com/cosmos/cosmos-sdk/blob/7d7821b9af132b0f6131640195326aa02b6751db/crypto/keys/lazy_keybase.go
 
-`lazyKeybase` 是 `dbKeybase` 的一个简单包装，它仅在要执行操作时锁定数据库，并在之后立即将其解锁。使用 `lazyKeybase`[命令行界面](../interfaces/cli.md) 可以在 [rest server](../interfaces/rest.md)运行时创建新的账户，它也可以同时传递多个 CLI 命令
+`lazyKeybase` 是 `dbKeybase` 的一个简单包装，它仅在要执行操作时锁定数据库，并在之后立即将其解锁。使用 `lazyKeybase`[命令行界面](../core/cli.md) 可以在 [rest server](../core/grpc_rest.md)运行时创建新的账户，它也可以同时传递多个 CLI 命令
 
 ## 地址和公钥
 
diff --git a/docs/cn/basics/tx-lifecycle.md b/docs/cn/basics/tx-lifecycle.md
index cae4644fa770..1845978752ee 100644
--- a/docs/cn/basics/tx-lifecycle.md
+++ b/docs/cn/basics/tx-lifecycle.md
@@ -6,7 +6,7 @@
 
 ### Transaction 的创建
 
-命令行界面是主要的应用程序界面之一，`Tx` 可以由用户输入[以下命令](https://docs.cosmos.network/master/interfaces/cli.html)来创建，其中 `[command]` 是 `Tx` 的类型，`[args]` 是相关参数，`[flags]` 是相关配置例如 gas price：
+命令行界面是主要的应用程序界面之一，`Tx` 可以由用户输入[以下命令](https://docs.cosmos.network/master/core/cli.html)来创建，其中 `[command]` 是 `Tx` 的类型，`[args]` 是相关参数，`[flags]` 是相关配置例如 gas price：
 
 ```bash
 [appname] tx [command] [args] [flags]
@@ -18,7 +18,7 @@
 
 #### Gas 和 Fee
 
-此外，用户可以使用这几个[参数](https://docs.cosmos.network/master/interfaces/cli.html)来表明他们愿意支付多少 [fee](https://docs.cosmos.network/master/basics/gas-fees.html)：
+此外，用户可以使用这几个[参数](https://docs.cosmos.network/master/core/cli.html)来表明他们愿意支付多少 [fee](https://docs.cosmos.network/master/basics/gas-fees.html)：
 
 - `--gas` 指的是 [gas](https://docs.cosmos.network/master/basics/gas-fees.html) 的数量，gas 代表 `Tx` 消耗的计算资源，需要消耗多少 gas 取决于具体的 `Tx`，在 `Tx` 执行之前无法被精确计算出来，但可以通过在 `--gas` 后带上参数 `auto` 来进行估算。
 - `--gas-adjustment`（可选）可用于适当的增加 `gas`，以避免其被低估。例如，用户可以将 `gas-adjustment` 设为 1.5，那么被指定的 gas 将是被估算 gas 的 1.5 倍。
@@ -39,7 +39,7 @@ appcli tx send <recipientAddress> 1000uatom --from <senderAddress> --gas auto --
 
 #### 其他的 Transaction 创建方法
 
-命令行是与应用程序进行交互的一种简便方法，但是 `Tx` 也可以使用 [REST interface](https://docs.cosmos.network/master/interfaces/rest.html) 或应用程序开发人员定义的某些其他入口点来创建命令行。从用户的角度来看，交互方式取决于他们正在使用的是页面还是钱包（例如， `Tx` 使用 [Lunie.io](https://lunie.io/#/) 创建并使用 Ledger Nano S 对其进行签名）。
+命令行是与应用程序进行交互的一种简便方法，但是 `Tx` 也可以使用 [REST interface](https://docs.cosmos.network/master/core/grpc_rest.html) 或应用程序开发人员定义的某些其他入口点来创建命令行。从用户的角度来看，交互方式取决于他们正在使用的是页面还是钱包（例如， `Tx` 使用 [Lunie.io](https://lunie.io/#/) 创建并使用 Ledger Nano S 对其进行签名）。
 
 ## 添加到交易池
 
diff --git a/docs/cn/clients/service-providers.md b/docs/cn/clients/service-providers.md
index 7350b98d8110..37ddf4893dd8 100644
--- a/docs/cn/clients/service-providers.md
+++ b/docs/cn/clients/service-providers.md
@@ -2,7 +2,7 @@
 
 我们将“服务提供商”定义为可以为最终用户提供服务的实体，这些实体涉及与基于 Cosmos-SDK 的区块链（包括 Cosmos Hub）的某种形式的交互。更具体地说，本文档将集中于与 token 的交互。
 
-本节不涉及想要提供[轻客户端](https://github.com/cosmos/cosmos-sdk/tree/master/docs/interfaces/lite)功能的钱包开发者。服务提供商将作为最终用户的区块链的可信接入点。
+本节不涉及想要提供[轻客户端](https://docs.tendermint.com/master/tendermint-core/light-client.html)功能的钱包开发者。服务提供商将作为最终用户的区块链的可信接入点。
 
 ## 架构的高级描述
 
diff --git a/docs/core/transactions.md b/docs/core/transactions.md
index ead438ed0738..96f37ad8603e 100644
--- a/docs/core/transactions.md
+++ b/docs/core/transactions.md
@@ -126,7 +126,7 @@ Once the transaction bytes are generated, there are currently three ways of broa
 
 #### CLI
 
-Application developers create entrypoints to the application by creating a [command-line interface](../interfaces/cli.md) and/or [REST interface](../interfaces/rest.md), typically found in the application's `./cmd` folder. These interfaces allow users to interact with the application through command-line.
+Application developers create entrypoints to the application by creating a [command-line interface](../core/cli.md), [gRPC and/or REST interface](../core/grpc_rest.md), typically found in the application's `./cmd` folder. These interfaces allow users to interact with the application through command-line.
 
 For the [command-line interface](../building-modules/module-interfaces.md#cli), module developers create subcommands to add as children to the application top-level transaction command `TxCmd`. CLI commands actually bundle all the steps of transaction processing into one simple command: creating messages, generating transactions and broadcasting. For concrete examples, see the [Interacting with a Node](../run-node/interact-node.md) section. An example transaction made using CLI looks like:
 
diff --git a/docs/kr/clients/service-providers.md b/docs/kr/clients/service-providers.md
index 4e3d2d5f6251..c476e6d1bbfd 100755
--- a/docs/kr/clients/service-providers.md
+++ b/docs/kr/clients/service-providers.md
@@ -2,7 +2,7 @@
 
 '서비스 제공자'는 코스모스 SDK 기반 블록체인(코스모스 허브도 포함됩니다)과 교류하는 서비스를 엔드유저에게 제공하는 특정 인원/기관을 뜻합니다. 이 문서는 주로 토큰 인터랙션에 대한 정보를 다룹니다.
 
-다음 항목은 [Light-Client](https://github.com/cosmos/cosmos-sdk/tree/master/docs/interfaces/lite) 기능을 제공하려는 월렛 개발자들에게 해당하지 않습니다. 서비스 제공자는 엔드 유저와 블록체인을 이어주는 신뢰할 수 있는 기관/개인입니다.
+다음 항목은 [Light-Client](https://docs.tendermint.com/master/tendermint-core/light-client.html) 기능을 제공하려는 월렛 개발자들에게 해당하지 않습니다. 서비스 제공자는 엔드 유저와 블록체인을 이어주는 신뢰할 수 있는 기관/개인입니다.
 
 ## 보편적 아키텍처 설명