Built an Indian electricity tariff MCP server — it’s now on the Official MCP Registry

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I’ve been working on a tariff intelligence API for India for the last few months.

The idea came from a pretty boring but painful problem:

Electricity tariffs are still buried across regulator orders, PDFs, tariff schedules, corrigenda and utility documents. If you’re building a solar calculator, EV charging product, quotation tool or energy software, somebody eventually ends up maintaining a spreadsheet or hard-coded tariff logic.

So I started building Power Expert India Tariff API.

It currently focuses on things like:

- verified tariff calculations

- licensee/category routing

- fixed + energy + wheeling charges

- source/evidence traceability

- effective tariff references

- fail-closed handling when a component isn’t verified instead of guessing a rate

Bihar was the first implementation.

Maharashtra now covers MSEDCL, Tata Power-D, AEML and BEST, with deeper payable-bill logic still being added.

This week I also wrapped the API as an MCP server:

"com.powerexpertindia/tariff-mcp" v1.0.0

It’s now published on the Official MCP Registry.

What surprised me: searching “tariff” in the registry currently shows only four MCP servers, and this appears to be the only one focused on Indian electricity tariffs.

Still very early, and there’s plenty left to build — FAC/FPPPA, full ToD payable logic, broader categories, historical adjustments, bill-level regression, and more states.

But I’m curious about one thing:

If you work in solar, EV charging, energy SaaS, billing or electricity analytics — how are you maintaining Indian tariff logic today?

Hard-coded rates? Excel? Manual updates? Something better?

Would genuinely like to hear how others are solving this.