#money-supply

How fast the money in each economy is growing — narrow money (M1) and broad money (M3) growth as an API, live from the OECD's official monetary statistics, no key. The money supply is the total stock of money in circulation: M1 is cash and instantly-spendable deposits (the transactional money that turns over fast), M3 is M1 plus savings and near-money. How fast it grows is one of the oldest macro signals there is — money growth running well ahead of the economy is the classic fuel for inflation and asset-price booms, while money contracting flags a credit squeeze. Central banks, bond traders and macro investors watch the year-on-year money-growth rate to read the liquidity tide. The OECD publishes a seasonally-adjusted monetary-aggregate index for each economy; this API turns it into the number people actually use — the year-on-year and month-on-month growth of M1 and M3. The board endpoint ranks every economy by its broad-money (M3) growth, with narrow money (M1) alongside, so you can see where liquidity is expanding fastest and where it is drying up. The narrow endpoint ranks by M1 growth — narrow money turns over fastest and tends to lead. The country endpoint gives one economy's M1 and M3 growth, year-on-year and month-on-month. Each reading carries its own period and discontinued series are excluded, so the board is genuinely current. The money-supply / monetary-growth cut — distinct from the central-bank policy-rate APIs (the price of money, not its quantity), the inflation board, and the generic multi-provider data aggregator. Figures are monthly, in percent.

api.oanor.com/moneysupply-api

The interest rates euro-area households and businesses actually pay, and how fast the money supply is growing, read live from the European Central Bank's public Data Portal — no key, nothing stored. Policy rates are the headline, but what reaches the real economy is the bank lending rate: the cost of a new mortgage, a consumer loan, a business loan, and the rate paid on deposits. The rates endpoint returns the latest euro-area readings for all of these (the ECB MIR "cost of borrowing" series), each with its value, the month it refers to, the month-on-month change and a plain-language label. The moneysupply endpoint returns the annual growth of M1, M2 and M3 — the monetary aggregates whose expansion or contraction leads inflation and the credit cycle. The series endpoint returns the recent monthly history of any one indicator. This is the euro-area bank-rate / monetary-aggregate macro cut — distinct from the ECB policy-rate, yield-curve and €STR APIs, the FX-rate APIs and the country-specific central-bank APIs in the catalogue. All series are euro-area (U2), monthly, in percent.

api.oanor.com/bankrates-api