Average interest rates paid on US Treasury securities, by security type

Monthly average interest rates the US Treasury pays on its outstanding securities, from the official FiscalData API (Average Interest Rates dataset, updated monthly). Query: ?security=Treasury Bills (exact security_desc, optional; e.g. Treasury Notes, Treasury Bonds) &since=2026-01-01 (optional record_date floor) &limit=12 (1-100, newest first). Returns record_date, security type/name and avg rate in percent. Cached 24h.

get/v1/us/treasury-rates

Request

  • Base URL: https://data.greeneris.io (the document declares no server; this is the origin it was published from)
  • URL: https://data.greeneris.io/v1/us/treasury-rates
  • Auth: none declared

Query parameters

securitystring

Exact security_desc filter, e.g. Treasury Bills

sincestring

Only records with record_date >= this ISO date

limitinteger

Max records, newest first (1-100)

Response

Successful response

unknown required

Changes

No recorded changes to this operation across all 1 revision of this API.