> ## 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.

# ✨ April 7, 2026 - API Key Attribution, Billing Alerts & Bridge Improvements

> Swap execution attribution, billing notifications, and multi-chain bridge support

**TL;DR**: Swap executions now track API key attribution for detailed usage analytics, billing notifications are live via email and Discord with threshold-based alerts, and bridge-solver adds BSC/ARB/Polygon support with improved error handling and relay fills.

## API Key Attribution in Swap Executions

Swap executions now capture API key, customer, and organization identifiers.

* Track api\_key, customer\_id, organization\_id in swap\_executions table
* Database migration simplified to api\_key + index structure
* Enables detailed usage analytics and attribution per organization
* Supports billing breakdowns by API key and customer

## Billing Notifications

Real-time billing and usage alerts now available via email and Discord.

* Email notifications for usage and billing via Brevo integration
* Discord usage alert module with threshold-aligned embeds
* Slack summaries for sent and failed email notifications

## Bridge-Solver Multi-Chain Support

Bridge API expands to BSC, Arbitrum, and Polygon with improved reliability.

* Added BSC/ARB/Polygon contracts to bridge API
* Handle float estimatedAmountOut from swap engine
* Store destination TX hash for relay fills instead of source TX

## MTT Widget Enhancements

New chart timeframes and smoother UX.

* Added 4h and 30min resolutions in MTT widgets
* Enable from/to time range selection in embed widget
* Chart timeframe switching no longer requires double-click

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Shipped by Sacha, Sandy, Florent, Florian, Cyril, Knowzzz