> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mobula.io/llms.txt
> Use this file to discover all available pages before exploring further.

# ✨ February 18, 2026 - Wallet Labels Endpoint, WSS Subscription Tracking & UniswapV4 Router

> New GET /wallet/labels endpoint, WebSocket subscription tracking, Solana node lag detection, and UniswapV4 in MobulaRouter

**TL;DR**: Wallet labels are now queryable via REST, WebSocket subscriptions are tracked for analytics, the Solana health check detects node lag via on-chain timestamps, and MobulaRouter supports UniswapV4.

***

## GET /api/2/wallet/labels

New endpoint to fetch labels for one or more wallet addresses:

```
GET /api/2/wallet/labels?address=0x...
```

* Returns entity labels (CEX, protocol, known trader, etc.)
* Powered by the Arkham entity database and internal label scrapers
* Same data that appears on trade sources in swap responses

***

## WebSocket Subscription Tracking

Active WebSocket subscriptions are now tracked and observable:

* Subscribe/unsubscribe events are logged to the streams gateway
* Session-level subscription state is stored and resumable
* Enables usage analytics per WebSocket session

***

## Solana Node Lag Detection

The health check now detects Solana node lag using on-chain timestamps:

* Compares the latest slot timestamp to wall-clock time
* Alerts when the node falls behind by a configurable threshold
* Prevents stale data from being served during Solana network degradation

***

## UniswapV4 Support in MobulaRouter (v2.2.0)

MobulaRouter smart contract updated to v2.2.0:

* Full UniswapV4 swap routing support added
* Enables on-chain price queries against V4 pools directly from the router

***

*Shipped by Delox, Sacha & Sanjay*