diff --git a/packages/api/src/augment/rpc.ts b/packages/api/src/augment/rpc.ts
index ecc1b1dbe9..2f996b99e1 100644
--- a/packages/api/src/augment/rpc.ts
+++ b/packages/api/src/augment/rpc.ts
@@ -2,7 +2,7 @@
 /* eslint-disable */
 
 import { AnyNumber, Codec, IExtrinsic, Observable } from '@polkadot/types/types';
-import { HashMap, Option, Vec } from '@polkadot/types/codec';
+import { HashMap, Json, Option, Vec } from '@polkadot/types/codec';
 import { Bytes, Null, StorageKey, Text, bool, u32, u64 } from '@polkadot/types/primitive';
 import { Metadata } from '@polkadot/types';
 import { ExtrinsicOrHash, ExtrinsicStatus } from '@polkadot/types/interfaces/author';
@@ -19,7 +19,7 @@ import { RuntimeDispatchInfo } from '@polkadot/types/interfaces/payment';
 import { RpcMethods } from '@polkadot/types/interfaces/rpc';
 import { AccountId, BlockNumber, H256, Hash, Header, Index, Justification, KeyValue, SignedBlock, StorageData } from '@polkadot/types/interfaces/runtime';
 import { ReadProof, RuntimeVersion } from '@polkadot/types/interfaces/state';
-import { ApplyExtrinsicResult, ChainProperties, ChainType, Health, NetworkState, NodeRole, PeerInfo } from '@polkadot/types/interfaces/system';
+import { ApplyExtrinsicResult, ChainProperties, ChainType, Health, NetworkState, NodeRole, PeerInfo, SyncState } from '@polkadot/types/interfaces/system';
 
 declare module '@polkadot/rpc-core/types.jsonrpc' {
   export interface RpcInterface {
@@ -245,6 +245,12 @@ declare module '@polkadot/rpc-core/types.jsonrpc' {
        **/
       subscribeStorage: AugmentedRpc<<T = Codec[]>(keys?: Vec<StorageKey> | (StorageKey | string | Uint8Array | any)[]) => Observable<T>>;
     };
+    syncstate: {
+      /**
+       * Returns the json-serialized chainspec running the node, with a sync state.
+       **/
+      genSyncSpec: AugmentedRpc<(raw: bool | boolean | Uint8Array) => Observable<Json>>;
+    };
     system: {
       /**
        * Retrieves the next accountIndex as available on the node
@@ -302,6 +308,10 @@ declare module '@polkadot/rpc-core/types.jsonrpc' {
        * Remove a reserved peer
        **/
       removeReservedPeer: AugmentedRpc<(peerId: Text | string) => Observable<Text>>;
+      /**
+       * Returns the state of the syncing of the node
+       **/
+      syncState: AugmentedRpc<() => Observable<SyncState>>;
       /**
        * Retrieves the version of the node
        **/
diff --git a/packages/api/src/base/Decorate.ts b/packages/api/src/base/Decorate.ts
index fb2fa038be..f90ab77b6d 100644
--- a/packages/api/src/base/Decorate.ts
+++ b/packages/api/src/base/Decorate.ts
@@ -225,7 +225,7 @@ export default abstract class Decorate<ApiType extends ApiTypes> extends Events
   protected _filterRpcMethods (exposed: string[]): void {
     const hasResults = exposed.length !== 0;
     const allKnown = [...this._rpcCore.mapping.entries()];
-    const allKeys = allKnown.reduce((allKeys: string[], [, { alias, method, pubsub, section }]): string[] => {
+    const allKeys = allKnown.reduce((allKeys: string[], [, { alias, endpoint, method, pubsub, section }]): string[] => {
       allKeys.push(`${section}_${method}`);
 
       if (pubsub) {
@@ -237,6 +237,10 @@ export default abstract class Decorate<ApiType extends ApiTypes> extends Events
         allKeys.push(...alias);
       }
 
+      if (endpoint) {
+        allKeys.push(endpoint);
+      }
+
       return allKeys;
     }, []);
     const unknown = exposed.filter((key) => !allKeys.includes(key));
diff --git a/packages/rpc-core/src/index.ts b/packages/rpc-core/src/index.ts
index f7dedbb5ef..1d4c787d68 100644
--- a/packages/rpc-core/src/index.ts
+++ b/packages/rpc-core/src/index.ts
@@ -106,6 +106,8 @@ export default class Rpc implements RpcInterface {
 
   public readonly state!: RpcInterface['state'];
 
+  public readonly syncstate!: RpcInterface['syncstate'];
+
   public readonly system!: RpcInterface['system'];
 
   /**
@@ -186,13 +188,14 @@ export default class Rpc implements RpcInterface {
 
   private _createInterface<Section extends keyof RpcInterface> (section: string, methods: Record<string, DefinitionRpc | DefinitionRpcSub>): RpcInterface[Section] {
     return Object
-      .keys(methods)
-      .filter((method) => !this.mapping.has(`${section}_${method}`))
-      .reduce((exposed, method): RpcInterface[Section] => {
+      .entries(methods)
+      .filter(([method, { endpoint }]) => !this.mapping.has(endpoint || `${section}_${method}`))
+      .reduce((exposed, [method, { endpoint }]): RpcInterface[Section] => {
         const def = methods[method];
         const isSubscription = !!(def as DefinitionRpcSub).pubsub;
+        const jsonrpc = endpoint || `${section}_${method}`;
 
-        this.mapping.set(`${section}_${method}`, { ...def, isSubscription, jsonrpc: `${section}_${method}`, method, section });
+        this.mapping.set(jsonrpc, { ...def, isSubscription, jsonrpc, method, section });
 
         // FIXME Remove any here
         // To do so, remove `RpcInterfaceMethod` from './types.ts', and refactor
@@ -217,7 +220,7 @@ export default class Rpc implements RpcInterface {
   }
 
   private _createMethodSend (section: string, method: string, def: DefinitionRpc): RpcInterfaceMethod {
-    const rpcName = `${section}_${method}`;
+    const rpcName = def.endpoint || `${section}_${method}`;
     const hashIndex = def.params.findIndex(({ isHistoric }) => isHistoric);
     const cacheIndex = def.params.findIndex(({ isCached }) => isCached);
     let memoized: null | RpcInterfaceMethod & memoizee.Memoized<RpcInterfaceMethod> = null;
diff --git a/packages/typegen/src/metadataMd.ts b/packages/typegen/src/metadataMd.ts
index 7c548802a6..0d9f05009e 100644
--- a/packages/typegen/src/metadataMd.ts
+++ b/packages/typegen/src/metadataMd.ts
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import { MetadataLatest } from '@polkadot/types/interfaces/metadata';
-import { Codec } from '@polkadot/types/types';
+import { Codec, DefinitionRpcParam } from '@polkadot/types/types';
 
 import fs from 'fs';
 import Metadata from '@polkadot/metadata/Metadata';
@@ -120,7 +120,7 @@ function addRpc (): string {
             .sort()
             .map((methodName) => {
               const method = section.rpc[methodName];
-              const args = method.params.map(({ isOptional, name, type }: any): string => {
+              const args = method.params.map(({ isOptional, name, type }: DefinitionRpcParam): string => {
                 // eslint-disable-next-line @typescript-eslint/restrict-plus-operands
                 return name + (isOptional ? '?' : '') + ': `' + type + '`';
               }).join(', ');
@@ -128,7 +128,7 @@ function addRpc (): string {
 
               return {
                 interface: '`' + `api.rpc.${sectionName}.${methodName}` + '`',
-                jsonrpc: '`' + `${sectionName}_${methodName}` + '`',
+                jsonrpc: '`' + (method.endpoint || `${sectionName}_${methodName}`) + '`',
                 name: `${methodName}(${args}): ${type}`,
                 ...(method.description && { summary: method.description })
               };
diff --git a/packages/types/src/augment/registry.ts b/packages/types/src/augment/registry.ts
index 636741434f..4b32c10c24 100644
--- a/packages/types/src/augment/registry.ts
+++ b/packages/types/src/augment/registry.ts
@@ -44,7 +44,7 @@ import { Bid, BidKind, SocietyJudgement, SocietyVote, StrikeCount, VouchingStatu
 import { ActiveEraInfo, CompactAssignments, CompactAssignmentsTo257, CompactScore, CompactScoreCompact, ElectionCompute, ElectionResult, ElectionScore, ElectionSize, ElectionStatus, EraIndex, EraPoints, EraRewardPoints, EraRewards, Exposure, Forcing, IndividualExposure, KeyType, MomentOf, Nominations, NominatorIndex, NominatorIndexCompact, OffchainAccuracy, OffchainAccuracyCompact, PhragmenScore, Points, RewardDestination, RewardDestinationTo257, RewardPoint, SlashJournalEntry, SlashingSpans, SlashingSpansTo204, SpanIndex, SpanRecord, StakingLedger, StakingLedgerTo223, StakingLedgerTo240, UnappliedSlash, UnappliedSlashOther, UnlockChunk, ValidatorIndex, ValidatorIndexCompact, ValidatorPrefs, ValidatorPrefsTo145, ValidatorPrefsTo196 } from '@polkadot/types/interfaces/staking';
 import { ApiId, KeyValueOption, ReadProof, RuntimeVersion, RuntimeVersionApi, StorageChangeSet } from '@polkadot/types/interfaces/state';
 import { WeightToFeeCoefficient } from '@polkadot/types/interfaces/support';
-import { AccountInfo, ApplyExtrinsicResult, ChainProperties, ChainType, DigestOf, DispatchClass, DispatchError, DispatchErrorModule, DispatchErrorTo198, DispatchInfo, DispatchInfoTo190, DispatchInfoTo244, DispatchOutcome, DispatchResult, DispatchResultOf, DispatchResultTo198, Event, EventId, EventIndex, EventRecord, Health, InvalidTransaction, Key, LastRuntimeUpgradeInfo, NetworkState, NetworkStatePeerset, NetworkStatePeersetInfo, NodeRole, NotConnectedPeer, Peer, PeerEndpoint, PeerEndpointAddr, PeerInfo, PeerPing, Phase, RawOrigin, RefCount, RefCountTo259, SystemOrigin, TransactionValidityError, UnknownTransaction } from '@polkadot/types/interfaces/system';
+import { AccountInfo, ApplyExtrinsicResult, ChainProperties, ChainType, DigestOf, DispatchClass, DispatchError, DispatchErrorModule, DispatchErrorTo198, DispatchInfo, DispatchInfoTo190, DispatchInfoTo244, DispatchOutcome, DispatchResult, DispatchResultOf, DispatchResultTo198, Event, EventId, EventIndex, EventRecord, Health, InvalidTransaction, Key, LastRuntimeUpgradeInfo, NetworkState, NetworkStatePeerset, NetworkStatePeersetInfo, NodeRole, NotConnectedPeer, Peer, PeerEndpoint, PeerEndpointAddr, PeerInfo, PeerPing, Phase, RawOrigin, RefCount, RefCountTo259, SyncState, SystemOrigin, TransactionValidityError, UnknownTransaction } from '@polkadot/types/interfaces/system';
 import { Bounty, BountyIndex, BountyStatus, BountyStatusActive, BountyStatusCuratorProposed, BountyStatusPendingPayout, OpenTip, OpenTipFinderTo225, OpenTipTip, OpenTipTo225, TreasuryProposal } from '@polkadot/types/interfaces/treasury';
 import { Multiplier } from '@polkadot/types/interfaces/txpayment';
 import { Multisig, Timepoint } from '@polkadot/types/interfaces/utility';
@@ -1192,6 +1192,9 @@ declare module '@polkadot/types/types/registry' {
     'Compact<RefCountTo259>': Compact<RefCountTo259>;
     'Option<RefCountTo259>': Option<RefCountTo259>;
     'Vec<RefCountTo259>': Vec<RefCountTo259>;
+    SyncState: SyncState;
+    'Option<SyncState>': Option<SyncState>;
+    'Vec<SyncState>': Vec<SyncState>;
     SystemOrigin: SystemOrigin;
     'Option<SystemOrigin>': Option<SystemOrigin>;
     'Vec<SystemOrigin>': Vec<SystemOrigin>;
diff --git a/packages/types/src/codec/StructAny.ts b/packages/types/src/codec/Json.ts
similarity index 100%
rename from packages/types/src/codec/StructAny.ts
rename to packages/types/src/codec/Json.ts
diff --git a/packages/types/src/codec/index.ts b/packages/types/src/codec/index.ts
index 0e37e8d21d..a5dea4fe86 100644
--- a/packages/types/src/codec/index.ts
+++ b/packages/types/src/codec/index.ts
@@ -13,12 +13,12 @@ export { default as Compact } from './Compact';
 // export { default as Date } from './Date';
 export { default as Enum } from './Enum';
 export { default as HashMap } from './HashMap';
+export { default as Json } from './Json';
 export { default as Linkage } from './Linkage';
 export { default as Option } from './Option';
 export { default as Result } from './Result';
 export { default as Set } from './Set';
 export { default as Struct } from './Struct';
-// export { default as StructAny } from './StructAny';
 export { default as Tuple } from './Tuple';
 export { default as Vec } from './Vec';
 
diff --git a/packages/types/src/create/registry.ts b/packages/types/src/create/registry.ts
index 742dbf3870..c4115d00d1 100644
--- a/packages/types/src/create/registry.ts
+++ b/packages/types/src/create/registry.ts
@@ -10,6 +10,7 @@ import extrinsicsFromMeta from '@polkadot/metadata/Decorated/extrinsics/fromMeta
 import { BN_ZERO, assert, formatBalance, isFunction, isString, isU8a, isUndefined, logger, stringCamelCase, u8aToHex } from '@polkadot/util';
 import { blake2AsU8a } from '@polkadot/util-crypto';
 
+import Json from '../codec/Json';
 import Raw from '../codec/Raw';
 import { defaultExtensions, expandExtensionTypes, findUnknownExtensions } from '../extrinsic/signedExtensions';
 import { EventData } from '../generic/Event';
@@ -127,7 +128,7 @@ export class TypeRegistry implements Registry {
     // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
     const definitions: Record<string, { types: RegistryTypes }> = require('../interfaces/definitions');
 
-    this.#knownDefaults = { Raw, ...baseTypes };
+    this.#knownDefaults = { Json, Raw, ...baseTypes };
     this.#knownDefinitions = definitions;
 
     this.init();
diff --git a/packages/types/src/interfaces/definitions.ts b/packages/types/src/interfaces/definitions.ts
index 917a515784..c249ef4d90 100644
--- a/packages/types/src/interfaces/definitions.ts
+++ b/packages/types/src/interfaces/definitions.ts
@@ -29,6 +29,7 @@ export { default as session } from './session/definitions';
 export { default as society } from './society/definitions';
 export { default as staking } from './staking/definitions';
 export { default as support } from './support/definitions';
+export { default as syncstate } from './syncstate/definitions';
 export { default as system } from './system/definitions';
 export { default as treasury } from './treasury/definitions';
 export { default as txpayment } from './txpayment/definitions';
diff --git a/packages/types/src/interfaces/syncstate/definitions.ts b/packages/types/src/interfaces/syncstate/definitions.ts
new file mode 100644
index 0000000000..58e36a3604
--- /dev/null
+++ b/packages/types/src/interfaces/syncstate/definitions.ts
@@ -0,0 +1,24 @@
+// Copyright 2017-2020 @polkadot/types authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// order important in structs... :)
+/* eslint-disable sort-keys */
+
+import { Definitions } from '../../types';
+
+export default {
+  rpc: {
+    genSyncSpec: {
+      endpoint: 'sync_state_genSyncSpec',
+      description: 'Returns the json-serialized chainspec running the node, with a sync state.',
+      params: [
+        {
+          name: 'raw',
+          type: 'bool'
+        }
+      ],
+      type: 'Json'
+    }
+  },
+  types: {}
+} as Definitions;
diff --git a/packages/types/src/interfaces/syncstate/index.ts b/packages/types/src/interfaces/syncstate/index.ts
new file mode 100644
index 0000000000..2d307291c3
--- /dev/null
+++ b/packages/types/src/interfaces/syncstate/index.ts
@@ -0,0 +1,4 @@
+// Auto-generated via `yarn polkadot-types-from-defs`, do not edit
+/* eslint-disable */
+
+export * from './types';
diff --git a/packages/types/src/interfaces/syncstate/types.ts b/packages/types/src/interfaces/syncstate/types.ts
new file mode 100644
index 0000000000..a3423973fa
--- /dev/null
+++ b/packages/types/src/interfaces/syncstate/types.ts
@@ -0,0 +1,4 @@
+// Auto-generated via `yarn polkadot-types-from-defs`, do not edit
+/* eslint-disable */
+
+export type PHANTOM_SYNCSTATE = 'syncstate';
diff --git a/packages/types/src/interfaces/system/definitions.ts b/packages/types/src/interfaces/system/definitions.ts
index db0643d92a..d38d5a8e90 100644
--- a/packages/types/src/interfaces/system/definitions.ts
+++ b/packages/types/src/interfaces/system/definitions.ts
@@ -110,6 +110,11 @@ export default {
       description: 'Returns the roles the node is running as',
       params: [],
       type: 'Vec<NodeRole>'
+    },
+    syncState: {
+      description: 'Returns the state of the syncing of the node',
+      params: [],
+      type: 'SyncState'
     }
   },
   types: {
@@ -279,6 +284,11 @@ export default {
     },
     RefCount: 'u32',
     RefCountTo259: 'u8',
+    SyncState: {
+      startingBlock: 'BlockNumber',
+      currentBlock: 'BlockNumber',
+      highestBlock: 'Option<BlockNumber>'
+    },
     SystemOrigin: 'RawOrigin',
     TransactionValidityError: {
       _enum: {
diff --git a/packages/types/src/interfaces/system/types.ts b/packages/types/src/interfaces/system/types.ts
index ac3ce8c431..cbbd5982c7 100644
--- a/packages/types/src/interfaces/system/types.ts
+++ b/packages/types/src/interfaces/system/types.ts
@@ -262,6 +262,13 @@ export interface RefCount extends u32 {}
 /** @name RefCountTo259 */
 export interface RefCountTo259 extends u8 {}
 
+/** @name SyncState */
+export interface SyncState extends Struct {
+  readonly startingBlock: BlockNumber;
+  readonly currentBlock: BlockNumber;
+  readonly highestBlock: Option<BlockNumber>;
+}
+
 /** @name SystemOrigin */
 export interface SystemOrigin extends RawOrigin {}
 
diff --git a/packages/types/src/interfaces/types.ts b/packages/types/src/interfaces/types.ts
index 479450f13b..10e618fd68 100644
--- a/packages/types/src/interfaces/types.ts
+++ b/packages/types/src/interfaces/types.ts
@@ -26,6 +26,7 @@ export * from './session/types';
 export * from './society/types';
 export * from './staking/types';
 export * from './support/types';
+export * from './syncstate/types';
 export * from './system/types';
 export * from './treasury/types';
 export * from './txpayment/types';
diff --git a/packages/types/src/types/definitions.ts b/packages/types/src/types/definitions.ts
index b9814b31ee..4399c69eb1 100644
--- a/packages/types/src/types/definitions.ts
+++ b/packages/types/src/types/definitions.ts
@@ -22,6 +22,7 @@ export interface DefinitionRpcParam {
 export interface DefinitionRpc {
   alias?: string[];
   description: string;
+  endpoint?: string;
   params: DefinitionRpcParam[];
   type: DefinitionTypeType;
 }