# Voltnir

> Voltnir is self-hosted EPEX SPOT M7 intraday trading middleware for power trading desks: a single static binary that connects a desk to the EPEX SPOT intraday continuous market and exposes it over REST, WebSocket and gRPC, maintaining the order book, validating orders, and tracking position, cash and P&L in real time. Built by Voltnir B.V. (Netherlands). Pricing is not yet published. A free Voltnir simulator licence is available from the customer portal for the EPEX SPOT SIM environment; connecting to SIM requires an EPEX SPOT simulation (ASIM) licence, which issues the SIM credentials.

## Product
- [Home](https://voltnir.io/): what Voltnir is, who it is for, the security and deployment model, multi-tenant desks, pricing status, and how to get access
- [Features](https://voltnir.io/features): full reference of what the gateway does: EPEX SPOT M7 connectivity, order lifecycle, risk and position model, REST/WebSocket/gRPC APIs, XBID cross-border capacity, RBAC, audit trail, licensing, deployment
- [FAQ](https://voltnir.io/faq): what Voltnir is, which market it trades, self-hosting, the APIs, multi-tenancy, and how to try it on the EPEX SPOT simulator

## Learn
- [What is EPEX SPOT M7?](https://voltnir.io/learn/what-is-epex-spot-m7): the continuous intraday trading system for the EPEX SPOT market, and how desks connect to it
- [What is XBID?](https://voltnir.io/learn/what-is-xbid): cross-border intraday coupling (SIDC) and the available transfer capacity that bounds it
- [What are quarter-hour products?](https://voltnir.io/learn/what-are-quarter-hour-products): 15-minute power delivery contracts, 96 per day since October 2025, plus why they exist and how they trade

## Company
- [Privacy](https://voltnir.io/privacy): privacy policy of Voltnir B.V.
- [Customer portal](https://portal.voltnir.io/): accounts, licensing, downloads and API documentation (login required)

## Articles
- [Connecting to EPEX SPOT M7: the work nobody quotes you for](https://voltnir.io/articles/connecting-to-epex-spot-m7-the-work-nobody-quotes-you-for): "Connect to M7" tends to show up as one line on the plan. A couple of sprints, slotted in next to the strategy work that's the actual reason for the project. The exchange publishes an API, you write a client against it, orders go out and fills come back. On paper it's a small part of the whole thing. It's also…