diff --git a/x/slashing/spec/09_client.md b/x/slashing/spec/09_client.md
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@@ -0,0 +1,296 @@
+<!--
+order: 9
+-->
+
+## CLI
+
+A user can query and interact with the `slashing` module using the CLI.
+
+### Query
+
+The `query` commands allow users to query `slashing` state.
+
+```bash
+simd query slashing --help
+```
+
+#### params
+
+The `params` command allows users to query genesis parameters for the slashing module.
+
+```bash
+simd query slashing params [flags]
+```
+
+Example:
+
+```bash
+simd query slashing params
+```
+
+Example Output:
+
+```bash
+downtime_jail_duration: 600s
+min_signed_per_window: "0.500000000000000000"
+signed_blocks_window: "100"
+slash_fraction_double_sign: "0.050000000000000000"
+slash_fraction_downtime: "0.010000000000000000"
+```
+
+
+#### signing-info
+
+The `signing-info` command allows users to query signing-info of the validator using consensus public key.
+
+```bash
+simd query slashing signing-infos [flags]
+```
+
+Example:
+
+```bash
+simd query slashing signing-info '{"@type":"/cosmos.crypto.ed25519.PubKey","key":"Auxs3865HpB/EfssYOzfqNhEJjzys6jD5B6tPgC8="}'
+
+```
+
+Example Output:
+
+```bash
+address: cosmosvalcons1nrqsld3aw6lh6t082frdqc84uwxn0t958c
+index_offset: "2068"
+jailed_until: "1970-01-01T00:00:00Z"
+missed_blocks_counter: "0"
+start_height: "0"
+tombstoned: false
+```
+
+#### signing-infos
+
+The `signing-infos` command allows users to query signing infos of all validators.
+
+```bash
+simd query slashing signing-infos [flags]
+```
+
+Example:
+
+```bash
+simd query slashing signing-infos
+```
+
+Example Output:
+
+```bash
+info:
+- address: cosmosvalcons1nrqsld3aw6lh6t082frdqc84uwxn0t958c
+  index_offset: "2075"
+  jailed_until: "1970-01-01T00:00:00Z"
+  missed_blocks_counter: "0"
+  start_height: "0"
+  tombstoned: false
+pagination:
+  next_key: null
+  total: "0"
+```
+
+### Transactions
+
+The `tx` commands allow users to interact with the `slashing` module.
+
+```bash
+simd tx slashing --help
+```
+
+#### unjail
+
+The `unjail` command allows users to unjail a validator previously jailed for downtime.
+
+```bash
+  simd tx slashing unjail --from mykey [flags]
+```
+
+Example:
+
+```bash
+simd tx slashing unjail --from mykey
+```
+
+## gRPC
+
+A user can query the `slashing` module using gRPC endpoints.
+
+### Params
+
+The `Params` endpoint allows users to query the parameters of slashing module.
+
+```bash
+cosmos.slashing.v1beta1.Query/Params
+```
+
+Example:
+
+```bash
+grpcurl -plaintext localhost:9090 cosmos.slashing.v1beta1.Query/Params
+```
+
+Example Output:
+
+```bash
+{
+  "params": {
+    "signedBlocksWindow": "100",
+    "minSignedPerWindow": "NTAwMDAwMDAwMDAwMDAwMDAw",
+    "downtimeJailDuration": "600s",
+    "slashFractionDoubleSign": "NTAwMDAwMDAwMDAwMDAwMDA=",
+    "slashFractionDowntime": "MTAwMDAwMDAwMDAwMDAwMDA="
+  }
+}
+```
+
+### SigningInfo
+
+The SigningInfo queries the signing info of given cons address.
+
+```bash
+cosmos.slashing.v1beta1.Query/SigningInfo
+```
+
+Example:
+
+```bash
+grpcurl -plaintext -d '{"cons_address":"cosmosvalcons1nrqsld3aw6lh6t082frdqc84uwxn0t958c"}' localhost:9090 cosmos.slashing.v1beta1.Query/SigningInfo
+```
+
+Example Output:
+
+```bash
+{
+  "valSigningInfo": {
+    "address": "cosmosvalcons1nrqsld3aw6lh6t082frdqc84uwxn0t958c",
+    "indexOffset": "3493",
+    "jailedUntil": "1970-01-01T00:00:00Z"
+  }
+}
+```
+
+### SigningInfos
+
+The SigningInfos queries signing info of all validators.
+
+```bash
+cosmos.slashing.v1beta1.Query/SigningInfos
+```
+
+Example:
+
+```bash
+grpcurl -plaintext localhost:9090 cosmos.slashing.v1beta1.Query/SigningInfos
+```
+
+Example Output:
+
+```bash
+{
+  "info": [
+    {
+      "address": "cosmosvalcons1nrqslkwd3pz096lh6t082frdqc84uwxn0t958c",
+      "indexOffset": "2467",
+      "jailedUntil": "1970-01-01T00:00:00Z"
+    }
+  ],
+  "pagination": {
+    "total": "1"
+  }
+}
+```
+
+## REST
+
+A user can query the `slashing` module using REST endpoints.
+
+
+### Params
+
+```bash
+/cosmos/slashing/v1beta1/params
+```
+
+Example:
+
+```bash
+curl "localhost:1317/cosmos/slashing/v1beta1/params"
+```
+
+Example Output:
+
+```bash
+{
+  "params": {
+    "signed_blocks_window": "100",
+    "min_signed_per_window": "0.500000000000000000",
+    "downtime_jail_duration": "600s",
+    "slash_fraction_double_sign": "0.050000000000000000",
+    "slash_fraction_downtime": "0.010000000000000000"
+}
+```
+
+### signing_info
+
+```bash
+/cosmos/slashing/v1beta1/signing_infos/%s
+```
+
+Example:
+
+```bash
+curl "localhost:1317/cosmos/slashing/v1beta1/signing_infos/cosmosvalcons1nrqslkwd3pz096lh6t082frdqc84uwxn0t958c"
+```
+
+Example Output:
+
+```bash
+{
+  "val_signing_info": {
+    "address": "cosmosvalcons1nrqslkwd3pz096lh6t082frdqc84uwxn0t958c",
+    "start_height": "0",
+    "index_offset": "4184",
+    "jailed_until": "1970-01-01T00:00:00Z",
+    "tombstoned": false,
+    "missed_blocks_counter": "0"
+  }
+}
+```
+
+### signing_infos
+
+```bash
+/cosmos/slashing/v1beta1/signing_infos
+```
+
+Example:
+
+```bash
+curl "localhost:1317/cosmos/slashing/v1beta1/signing_infos
+```
+
+Example Output:
+
+```bash
+{
+  "info": [
+    {
+      "address": "cosmosvalcons1nrqslkwd3pz096lh6t082frdqc84uwxn0t958c",
+      "start_height": "0",
+      "index_offset": "4169",
+      "jailed_until": "1970-01-01T00:00:00Z",
+      "tombstoned": false,
+      "missed_blocks_counter": "0"
+    }
+  ],
+  "pagination": {
+    "next_key": null,
+    "total": "1"
+  }
+}
+```
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diff --git a/x/slashing/spec/README.md b/x/slashing/spec/README.md
index fe175b100c..2d35c8cba4 100644
--- a/x/slashing/spec/README.md
+++ b/x/slashing/spec/README.md
@@ -43,3 +43,7 @@ This module will be used by the Cosmos Hub, the first hub in the Cosmos ecosyste
 7. **[Staking Tombstone](07_tombstone.md)**
    - [Abstract](07_tombstone.md#abstract)
 8. **[Parameters](08_params.md)**
+9. **[Client](09_client.md)**
+    - [CLI](09_client.md#cli)
+    - [gRPC](09_client.md#grpc)
+    - [REST](09_client.md#rest)
\ No newline at end of file