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U.S. Treasury Average Interest Rates on Federal Securities (T-Bills, Notes, Bonds, TIPS)

Official U.S. Treasury average interest rates across Treasury Bills, Notes, Bonds, TIPS, and Floating Rate Notes.

Call it (no API key)

GET https://api.agentdatahub.de/api/v1/call/us-treasury-avg-interest-rates?compact=1

Full metadata: without compact=1 · Markdown: format=llm · Only some fields: add &fields=a,b.c · MCP: tool call_api with {"apiId":"us-treasury-avg-interest-rates"}

Parameters

None.

Example response (live, compact)

{
  "apiId": "us-treasury-avg-interest-rates",
  "data_freshness": "cached",
  "data": {
    "count": 10,
    "securities": [
      {
        "date": "2026-09-30",
        "security_type": "Treasury Bills",
        "avg_interest_rate_pct": 3.87
      },
      {
        "date": "2026-09-30",
        "security_type": "Treasury Notes",
        "avg_interest_rate_pct": 3.383
      },
      {
        "date": "2026-09-30",
        "security_type": "Treasury Bonds",
        "avg_interest_rate_pct": 3.466
      },
      {
        "date": "2026-09-30",
        "security_type": "Treasury Inflation-Protected Securities (TIPS)",
        "avg_interest_rate_pct": 1.149
      },
      {
        "date": "2026-09-30",
        "security_type": "Treasury Floating Rate Notes (FRN)",
        "avg_interest_rate_pct": 4.141
      },
      {
        "date": "2026-09-30",
        "security_type": "Federal Financing Bank",
        "avg_interest_rate_pct": 2.383
      },
      {
        "date": "2026-09-30",
        "security_type": "Total Marketable",
        "avg_interest_rate_pct": 3.518
      },
      {
        "date": "2026-09-30",
        "security_type": "Domestic Series",
        "avg_interest_rate_pct": 7.577
      },
      {
        "date": "2026-09-30",
        "security_type": "Special Purpose Vehicle",
        "avg_interest_rate_pct": 3.189
      },
      {
        "date": "2026-09-30",
        "security_type": "State and Local Government Series",
        "avg_interest_rate_pct": 3.459
      }
    ]
  },
  "source": "U.S. Treasury Fiscal Data (avg_interest_rates)",
  "license": "U.S. Government Public Domain (CC0)"
}

Recorded history available: /api/v1/history/us-treasury-avg-interest-rates

Source & license