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US Treasury Yield Curve — Daily Par Yields for All Maturities since 1990 (U.S. Treasury)

Daily Treasury par yield curve rates (1 month to 30 years) of the U.S. Department of the Treasury, every business day since 1990. Answers "US 10-year yield on <date>" and curve shape questions. Options for maturity: 1M (1 Mo par yield), 1.5M (1.5 Month par yield), 2M (2 Mo par yield), 3M (3 Mo par yield), 4M (4 Mo par yield), 6M (6 Mo par yield), 1Y (1 Yr par yield), 2Y (2 Yr par yield), 3Y (3 Yr par yield), 5Y (5 Yr par yield), 7Y (7 Yr par yield), 10Y (10 Yr par yield), 20Y (20 Yr par yield), 30Y (30 Yr par yield).

Call it (no API key)

GET https://api.agentdatahub.de/api/v1/call/us-treasury-yield-curve?maturity=1M&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-yield-curve"}

Parameters

Example response (live, compact)

{
  "apiId": "us-treasury-yield-curve",
  "data_freshness": "cached",
  "data": {
    "maturity": "1M",
    "series": "1 Mo par yield",
    "unit": "% p.a.",
    "frequency": "D",
    "latest": {
      "period": "2026-10-29",
      "value": 4.06
    },
    "history": [
      {
        "period": "2026-10-13",
        "value": 4.1
      },
      {
        "period": "2026-10-14",
        "value": 4.11
      },
      {
        "period": "2026-10-15",
        "value": 4.17
      },
      {
        "period": "2026-10-16",
        "value": 4.12
      },
      {
        "period": "2026-10-19",
        "value": 4.11
      },
      {
        "period": "2026-10-20",
        "value": 4.1
      },
      {
        "period": "2026-10-21",
        "value": 4.09
      },
      {
        "period": "2026-10-22",
        "value": 4.11
      },
      {
        "period": "2026-10-23",
        "value": 4.11
      },
      {
        "period": "2026-10-26",
        "value": 4.11
      },
      {
        "period": "2026-10-27",
        "value": 4.1
      },
      {
        "period": "2026-10-28",
        "value": 4.07
      },
      {
        "period": "2026-10-29",
        "value": 4.06
      }
    ],
    "available": {
      "from": "2001-07-31",
      "to": "2026-10-29",
      "points": 6314
    },
    "verification": {
      "checked_at": "2026-10-30T03:29:02.609Z",
      "checks": [
        {
          "period": "2026-09-30",
          "field": "value",
          "expected": 4.02,
          "ok": true,
          "evidence": "treasury.gov text view, 09/30/2026"
        }
      ]
    },
    "source": {
      "publisher": "U.S. Department of the Treasury",
      "licence": "Public domain (U.S. Government work, 17 U.S.C. § 105)",
      "licence_url": "https://home.treasury.gov/resource-center/data-chart-center/interest-rates/TextView?type=daily_treasury_yield_curve"
    },
    "attribution": "Source: U.S. Department of the Treasury, Daily Treasury Par Yield Curve Rates"
  },
  "source": "U.S. Department of the Treasury",
  "license": "Public domain (U.S. Government work, 17 U.S.C. § 105)"
}

Recorded history available: /api/v1/history/us-treasury-yield-curve?maturity=1M

Source & license