finanz.halowerk.com

Returns the current fee rates for the usual confirmation targets together with the state of the mempool behind them, and then does the part that is usually missing: it estimates the virtual size of the transaction you describe and computes the resulting total fee in satoshis for each target.

Day-ahead power prices for a European bidding zone from Energy-Charts, published by Fraunhofer ISE from Bundesnetzagentur SMARD data under CC BY 4.0 and therefore usable commercially with attribution. Returns the quarter-hourly or hourly curve with minimum, maximum, mean, the cheapest and the dearest hour, and how many intervals carry a negative price — the figures a load-shifting or battery decision actually turns on.

Resolves in both directions: a 20-character LEI returns that entity, a company name returns the matching entities ranked by the search. Each result carries the registered legal name, legal form, jurisdiction, registered address, the local register and registration number, and the LEI registration status with its last update and next renewal date — a lapsed registration means nobody renewed it and the data may be stale, which is stated rather than left to be discovered.