diff --git a/package.json b/package.json
index 63a8da6..763e877 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/registry-sdk",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "repository": "git@github.com:cerc-io/registry-sdk.git",
diff --git a/proto/cerc/onboarding/v1/query.proto b/proto/cerc/onboarding/v1/query.proto
index bbcfc87..f340d99 100644
--- a/proto/cerc/onboarding/v1/query.proto
+++ b/proto/cerc/onboarding/v1/query.proto
@@ -16,6 +16,19 @@ service Query {
       returns (QueryParticipantsResponse) {
     option (google.api.http).get = "/cerc/onboarding/v1/participants";
   }
+
+  // GetParticipantByAddress queries a participant by cosmos (laconic) address
+  rpc GetParticipantByAddress(QueryGetParticipantByAddressRequest)
+      returns (QueryGetParticipantByAddressResponse) {
+    option (google.api.http).get = "/cerc/onboarding/v1/participants/{address}";
+  }
+
+  // GetParticipantByNitroAddress queries a participant by nitro address
+  rpc GetParticipantByNitroAddress(QueryGetParticipantByNitroAddressRequest)
+      returns (QueryGetParticipantByNitroAddressResponse) {
+    option (google.api.http).get =
+        "/cerc/onboarding/v1/participants/{nitro_address}";
+  }
 }
 
 // QueryParticipantsRequest queries participants
@@ -24,7 +37,7 @@ message QueryParticipantsRequest {
   cosmos.base.query.v1beta1.PageRequest pagination = 1;
 }
 
-// QueryParticipantsResponse is response type for get the participants
+// QueryParticipantsResponse is response type for querying the participants
 message QueryParticipantsResponse {
   repeated Participant participants = 1
       [ (gogoproto.moretags) = "json:\"participants\" yaml:\"participants\"" ];
@@ -32,3 +45,31 @@ message QueryParticipantsResponse {
   // pagination defines the pagination in the response.
   cosmos.base.query.v1beta1.PageResponse pagination = 2;
 }
+
+// QueryGetParticipantByAddressRequest queries participant by the laconic
+// address
+message QueryGetParticipantByAddressRequest {
+  // Laconic address
+  string address = 1;
+}
+
+// QueryGetParticipantByAddressResponse is response type for querying
+// participant by the laconic address
+message QueryGetParticipantByAddressResponse {
+  // Participant details
+  Participant participant = 1;
+}
+
+// QueryGetParticipantByNitroAddressRequest queries participant by the nitro
+// address
+message QueryGetParticipantByNitroAddressRequest {
+  // Nitro address
+  string nitro_address = 1;
+}
+
+// QueryGetParticipantByNitroAddressResponse is response type for querying
+// participant by the nitro address
+message QueryGetParticipantByNitroAddressResponse {
+  // Participant details
+  Participant participant = 1;
+}
diff --git a/src/index.ts b/src/index.ts
index cf586ae..692ebc5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -461,6 +461,20 @@ export class Registry {
   async getParticipants () {
     return this._client.getParticipants();
   }
+
+  /**
+   * Get participant by cosmos (laconic) address.
+  */
+  async getParticipantByAddress (address: string) {
+    return this._client.getParticipantByAddress(address);
+  }
+
+  /**
+   * Get participant by nitro address.
+  */
+  async getParticipantByNitroAddress (nitroAddress: string) {
+    return this._client.getParticipantByNitroAddress(nitroAddress);
+  }
 }
 
 export { Account };
diff --git a/src/onboarding.test.ts b/src/onboarding.test.ts
index 3c7c80e..ca51fd9 100644
--- a/src/onboarding.test.ts
+++ b/src/onboarding.test.ts
@@ -1,6 +1,6 @@
 import { Wallet } from 'ethers';
 
-import { DirectSecp256k1Wallet } from '@cosmjs/proto-signing';
+import { DirectSecp256k1Wallet, AccountData as CosmosAccount } from '@cosmjs/proto-signing';
 
 import { Registry, Account } from './index';
 import { getConfig } from './testing/helper';
@@ -16,15 +16,30 @@ const DUMMY_KYC_ID = 'dummyKycId';
 const onboardingEnabledTests = () => {
   let registry: Registry;
   let ethWallet: Wallet;
+  let cosmosWallet: CosmosAccount;
+  let expectedParticipants: Participant[] = [];
 
   beforeAll(async () => {
     registry = new Registry(gqlEndpoint, rpcEndpoint, chainId);
-  });
 
-  test('Onboard participant.', async () => {
     const mnemonic = Account.generateMnemonic();
     ethWallet = Wallet.fromMnemonic(mnemonic);
 
+    const account = new Account(Buffer.from(privateKey, 'hex'));
+    const cosmosAccount = await DirectSecp256k1Wallet.fromKey(account._privateKey, 'laconic');
+    [cosmosWallet] = await cosmosAccount.getAccounts();
+
+    expectedParticipants = [
+      {
+        cosmosAddress: cosmosWallet.address,
+        nitroAddress: ethWallet.address,
+        role: DUMMY_ROLE,
+        kycId: DUMMY_KYC_ID
+      }
+    ];
+  });
+
+  test('Onboard participant.', async () => {
     const ethPayload = {
       address: ethWallet.address,
       msg: 'Message signed by ethereum private key'
@@ -42,21 +57,19 @@ const onboardingEnabledTests = () => {
   });
 
   test('Query participants.', async () => {
-    const account = new Account(Buffer.from(privateKey, 'hex'));
-    const cosmosAccount = await DirectSecp256k1Wallet.fromKey(account._privateKey, 'laconic');
-    const [cosmosWallet] = await cosmosAccount.getAccounts();
-
-    const expectedParticipants: Participant[] = [
-      {
-        cosmosAddress: cosmosWallet.address,
-        nitroAddress: ethWallet.address,
-        role: DUMMY_ROLE,
-        kycId: DUMMY_KYC_ID
-      }
-    ];
     const participants = await registry.getParticipants();
     expect(participants).toEqual(expectedParticipants);
   });
+
+  test('Query participant by address.', async () => {
+    const participant = await registry.getParticipantByAddress(cosmosWallet.address);
+    expect(participant).toEqual(expectedParticipants[0]);
+  });
+
+  test('Query participant by Nitro address.', async () => {
+    const participant = await registry.getParticipantByNitroAddress(ethWallet.address);
+    expect(participant).toEqual(expectedParticipants[0]);
+  });
 };
 
 const onboardingDisabledTests = () => {
diff --git a/src/proto/cerc/onboarding/v1/query.ts b/src/proto/cerc/onboarding/v1/query.ts
index 7c0d0e0..594be30 100644
--- a/src/proto/cerc/onboarding/v1/query.ts
+++ b/src/proto/cerc/onboarding/v1/query.ts
@@ -3,8 +3,8 @@ import {
   PageRequest,
   PageResponse,
 } from "../../../cosmos/base/query/v1beta1/pagination";
-import Long from "long";
 import { Participant } from "./onboarding";
+import Long from "long";
 import _m0 from "protobufjs/minimal";
 
 export const protobufPackage = "cerc.onboarding.v1";
@@ -15,13 +15,49 @@ export interface QueryParticipantsRequest {
   pagination?: PageRequest;
 }
 
-/** QueryParticipantsResponse is response type for get the participants */
+/** QueryParticipantsResponse is response type for querying the participants */
 export interface QueryParticipantsResponse {
   participants: Participant[];
   /** pagination defines the pagination in the response. */
   pagination?: PageResponse;
 }
 
+/**
+ * QueryGetParticipantByAddressRequest queries participant by the laconic
+ * address
+ */
+export interface QueryGetParticipantByAddressRequest {
+  /** Laconic address */
+  address: string;
+}
+
+/**
+ * QueryGetParticipantByAddressResponse is response type for querying
+ * participant by the laconic address
+ */
+export interface QueryGetParticipantByAddressResponse {
+  /** Participant details */
+  participant?: Participant;
+}
+
+/**
+ * QueryGetParticipantByNitroAddressRequest queries participant by the nitro
+ * address
+ */
+export interface QueryGetParticipantByNitroAddressRequest {
+  /** Nitro address */
+  nitroAddress: string;
+}
+
+/**
+ * QueryGetParticipantByNitroAddressResponse is response type for querying
+ * participant by the nitro address
+ */
+export interface QueryGetParticipantByNitroAddressResponse {
+  /** Participant details */
+  participant?: Participant;
+}
+
 function createBaseQueryParticipantsRequest(): QueryParticipantsRequest {
   return { pagination: undefined };
 }
@@ -175,12 +211,273 @@ export const QueryParticipantsResponse = {
   },
 };
 
+function createBaseQueryGetParticipantByAddressRequest(): QueryGetParticipantByAddressRequest {
+  return { address: "" };
+}
+
+export const QueryGetParticipantByAddressRequest = {
+  encode(
+    message: QueryGetParticipantByAddressRequest,
+    writer: _m0.Writer = _m0.Writer.create()
+  ): _m0.Writer {
+    if (message.address !== "") {
+      writer.uint32(10).string(message.address);
+    }
+    return writer;
+  },
+
+  decode(
+    input: _m0.Reader | Uint8Array,
+    length?: number
+  ): QueryGetParticipantByAddressRequest {
+    const reader = input instanceof _m0.Reader ? input : new _m0.Reader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseQueryGetParticipantByAddressRequest();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1:
+          message.address = reader.string();
+          break;
+        default:
+          reader.skipType(tag & 7);
+          break;
+      }
+    }
+    return message;
+  },
+
+  fromJSON(object: any): QueryGetParticipantByAddressRequest {
+    return {
+      address: isSet(object.address) ? String(object.address) : "",
+    };
+  },
+
+  toJSON(message: QueryGetParticipantByAddressRequest): unknown {
+    const obj: any = {};
+    message.address !== undefined && (obj.address = message.address);
+    return obj;
+  },
+
+  fromPartial<
+    I extends Exact<DeepPartial<QueryGetParticipantByAddressRequest>, I>
+  >(object: I): QueryGetParticipantByAddressRequest {
+    const message = createBaseQueryGetParticipantByAddressRequest();
+    message.address = object.address ?? "";
+    return message;
+  },
+};
+
+function createBaseQueryGetParticipantByAddressResponse(): QueryGetParticipantByAddressResponse {
+  return { participant: undefined };
+}
+
+export const QueryGetParticipantByAddressResponse = {
+  encode(
+    message: QueryGetParticipantByAddressResponse,
+    writer: _m0.Writer = _m0.Writer.create()
+  ): _m0.Writer {
+    if (message.participant !== undefined) {
+      Participant.encode(
+        message.participant,
+        writer.uint32(10).fork()
+      ).ldelim();
+    }
+    return writer;
+  },
+
+  decode(
+    input: _m0.Reader | Uint8Array,
+    length?: number
+  ): QueryGetParticipantByAddressResponse {
+    const reader = input instanceof _m0.Reader ? input : new _m0.Reader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseQueryGetParticipantByAddressResponse();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1:
+          message.participant = Participant.decode(reader, reader.uint32());
+          break;
+        default:
+          reader.skipType(tag & 7);
+          break;
+      }
+    }
+    return message;
+  },
+
+  fromJSON(object: any): QueryGetParticipantByAddressResponse {
+    return {
+      participant: isSet(object.participant)
+        ? Participant.fromJSON(object.participant)
+        : undefined,
+    };
+  },
+
+  toJSON(message: QueryGetParticipantByAddressResponse): unknown {
+    const obj: any = {};
+    message.participant !== undefined &&
+      (obj.participant = message.participant
+        ? Participant.toJSON(message.participant)
+        : undefined);
+    return obj;
+  },
+
+  fromPartial<
+    I extends Exact<DeepPartial<QueryGetParticipantByAddressResponse>, I>
+  >(object: I): QueryGetParticipantByAddressResponse {
+    const message = createBaseQueryGetParticipantByAddressResponse();
+    message.participant =
+      object.participant !== undefined && object.participant !== null
+        ? Participant.fromPartial(object.participant)
+        : undefined;
+    return message;
+  },
+};
+
+function createBaseQueryGetParticipantByNitroAddressRequest(): QueryGetParticipantByNitroAddressRequest {
+  return { nitroAddress: "" };
+}
+
+export const QueryGetParticipantByNitroAddressRequest = {
+  encode(
+    message: QueryGetParticipantByNitroAddressRequest,
+    writer: _m0.Writer = _m0.Writer.create()
+  ): _m0.Writer {
+    if (message.nitroAddress !== "") {
+      writer.uint32(10).string(message.nitroAddress);
+    }
+    return writer;
+  },
+
+  decode(
+    input: _m0.Reader | Uint8Array,
+    length?: number
+  ): QueryGetParticipantByNitroAddressRequest {
+    const reader = input instanceof _m0.Reader ? input : new _m0.Reader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseQueryGetParticipantByNitroAddressRequest();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1:
+          message.nitroAddress = reader.string();
+          break;
+        default:
+          reader.skipType(tag & 7);
+          break;
+      }
+    }
+    return message;
+  },
+
+  fromJSON(object: any): QueryGetParticipantByNitroAddressRequest {
+    return {
+      nitroAddress: isSet(object.nitroAddress)
+        ? String(object.nitroAddress)
+        : "",
+    };
+  },
+
+  toJSON(message: QueryGetParticipantByNitroAddressRequest): unknown {
+    const obj: any = {};
+    message.nitroAddress !== undefined &&
+      (obj.nitroAddress = message.nitroAddress);
+    return obj;
+  },
+
+  fromPartial<
+    I extends Exact<DeepPartial<QueryGetParticipantByNitroAddressRequest>, I>
+  >(object: I): QueryGetParticipantByNitroAddressRequest {
+    const message = createBaseQueryGetParticipantByNitroAddressRequest();
+    message.nitroAddress = object.nitroAddress ?? "";
+    return message;
+  },
+};
+
+function createBaseQueryGetParticipantByNitroAddressResponse(): QueryGetParticipantByNitroAddressResponse {
+  return { participant: undefined };
+}
+
+export const QueryGetParticipantByNitroAddressResponse = {
+  encode(
+    message: QueryGetParticipantByNitroAddressResponse,
+    writer: _m0.Writer = _m0.Writer.create()
+  ): _m0.Writer {
+    if (message.participant !== undefined) {
+      Participant.encode(
+        message.participant,
+        writer.uint32(10).fork()
+      ).ldelim();
+    }
+    return writer;
+  },
+
+  decode(
+    input: _m0.Reader | Uint8Array,
+    length?: number
+  ): QueryGetParticipantByNitroAddressResponse {
+    const reader = input instanceof _m0.Reader ? input : new _m0.Reader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseQueryGetParticipantByNitroAddressResponse();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1:
+          message.participant = Participant.decode(reader, reader.uint32());
+          break;
+        default:
+          reader.skipType(tag & 7);
+          break;
+      }
+    }
+    return message;
+  },
+
+  fromJSON(object: any): QueryGetParticipantByNitroAddressResponse {
+    return {
+      participant: isSet(object.participant)
+        ? Participant.fromJSON(object.participant)
+        : undefined,
+    };
+  },
+
+  toJSON(message: QueryGetParticipantByNitroAddressResponse): unknown {
+    const obj: any = {};
+    message.participant !== undefined &&
+      (obj.participant = message.participant
+        ? Participant.toJSON(message.participant)
+        : undefined);
+    return obj;
+  },
+
+  fromPartial<
+    I extends Exact<DeepPartial<QueryGetParticipantByNitroAddressResponse>, I>
+  >(object: I): QueryGetParticipantByNitroAddressResponse {
+    const message = createBaseQueryGetParticipantByNitroAddressResponse();
+    message.participant =
+      object.participant !== undefined && object.participant !== null
+        ? Participant.fromPartial(object.participant)
+        : undefined;
+    return message;
+  },
+};
+
 /** Query defines the gRPC querier service for onboarding module */
 export interface Query {
   /** Participants queries Participants list */
   Participants(
     request: QueryParticipantsRequest
   ): Promise<QueryParticipantsResponse>;
+  /** GetParticipantByAddress queries a participant by cosmos (laconic) address */
+  GetParticipantByAddress(
+    request: QueryGetParticipantByAddressRequest
+  ): Promise<QueryGetParticipantByAddressResponse>;
+  /** GetParticipantByNitroAddress queries a participant by nitro address */
+  GetParticipantByNitroAddress(
+    request: QueryGetParticipantByNitroAddressRequest
+  ): Promise<QueryGetParticipantByNitroAddressResponse>;
 }
 
 export class QueryClientImpl implements Query {
@@ -188,6 +485,9 @@ export class QueryClientImpl implements Query {
   constructor(rpc: Rpc) {
     this.rpc = rpc;
     this.Participants = this.Participants.bind(this);
+    this.GetParticipantByAddress = this.GetParticipantByAddress.bind(this);
+    this.GetParticipantByNitroAddress =
+      this.GetParticipantByNitroAddress.bind(this);
   }
   Participants(
     request: QueryParticipantsRequest
@@ -202,6 +502,35 @@ export class QueryClientImpl implements Query {
       QueryParticipantsResponse.decode(new _m0.Reader(data))
     );
   }
+
+  GetParticipantByAddress(
+    request: QueryGetParticipantByAddressRequest
+  ): Promise<QueryGetParticipantByAddressResponse> {
+    const data = QueryGetParticipantByAddressRequest.encode(request).finish();
+    const promise = this.rpc.request(
+      "cerc.onboarding.v1.Query",
+      "GetParticipantByAddress",
+      data
+    );
+    return promise.then((data) =>
+      QueryGetParticipantByAddressResponse.decode(new _m0.Reader(data))
+    );
+  }
+
+  GetParticipantByNitroAddress(
+    request: QueryGetParticipantByNitroAddressRequest
+  ): Promise<QueryGetParticipantByNitroAddressResponse> {
+    const data =
+      QueryGetParticipantByNitroAddressRequest.encode(request).finish();
+    const promise = this.rpc.request(
+      "cerc.onboarding.v1.Query",
+      "GetParticipantByNitroAddress",
+      data
+    );
+    return promise.then((data) =>
+      QueryGetParticipantByNitroAddressResponse.decode(new _m0.Reader(data))
+    );
+  }
 }
 
 interface Rpc {
diff --git a/src/registry-client.ts b/src/registry-client.ts
index 5191be2..31d8073 100644
--- a/src/registry-client.ts
+++ b/src/registry-client.ts
@@ -435,4 +435,44 @@ export class RegistryClient {
 
     return RegistryClient.getResult(this._graph(query)(variables), 'getParticipants');
   }
+
+  /**
+  * Get participant by cosmos address.
+  */
+  async getParticipantByAddress (address: string) {
+    const query = `query ($address: String!) {
+      getParticipantByAddress (address: $address) {
+        cosmosAddress
+        nitroAddress
+        role
+        kycId
+      }
+    }`;
+
+    const variables = {
+      address
+    };
+
+    return RegistryClient.getResult(this._graph(query)(variables), 'getParticipantByAddress');
+  }
+
+  /**
+  * Get participant by nitro address.
+  */
+  async getParticipantByNitroAddress (nitroAddress: string) {
+    const query = `query ($nitroAddress: String!) {
+      getParticipantByNitroAddress (nitroAddress: $nitroAddress) {
+        cosmosAddress
+        nitroAddress
+        role
+        kycId
+      }
+    }`;
+
+    const variables = {
+      nitroAddress
+    };
+
+    return RegistryClient.getResult(this._graph(query)(variables), 'getParticipantByNitroAddress');
+  }
 }