Overview
Treasury Yields sources daily constant-maturity market yields from the Federal Reserve (FRED), the same rates used to construct the Treasury yield curve. Nominal yields span 1-month to 30-year maturities and TIPS real yields span 5-year to 30-year. Historical month-end snapshots go back to January 2010. Paid plans also get the standard curve spreads (10yr-2yr, 10yr-3mo, 30yr-5yr, 5yr-2yr), inversion flags, the curve's shape, and breakeven inflation at each TIPS maturity (the nominal yield minus the real yield, the market's implied inflation rate).
Live Test Treasury Yields API →
Endpoint
One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.
curl "https://api.apiverve.com/v1/treasuryyields?date=2025-06&type=10yr" \
-H "x-api-key: your_api_key_here"const res = await fetch('https://api.apiverve.com/v1/treasuryyields?date=2025-06&type=10yr', {
headers: { 'x-api-key': 'your_api_key_here' },
});
if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);
const { data } = await res.json();
console.log(data);import requests
res = requests.get(
"https://api.apiverve.com/v1/treasuryyields?date=2025-06&type=10yr",
headers={"x-api-key": "your_api_key_here"},
timeout=15,
)
res.raise_for_status()
print(res.json()["data"])package main
import (
"fmt"
"io"
"net/http"
)
func main() {
req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/treasuryyields?date=2025-06&type=10yr", nil)
req.Header.Set("x-api-key", "your_api_key_here")
res, err := http.DefaultClient.Do(req)
if err != nil {
panic(err)
}
defer res.Body.Close()
out, _ := io.ReadAll(res.Body)
fmt.Println(string(out))
}Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.
Authentication
Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.
A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.
Parameters
Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them.
| Parameter | Type | Description |
|---|---|---|
dateOptionalPremium | string | Optional month in YYYY-MM format, back to 2010-01; returns that month's closing curve. Omit for the latest daily curve. |
typeOptionalPremium | string | Optional filter for a single point. Legacy security types: bills, notes, bonds, tips, frn. Or a maturity: 1mo, 3mo, 6mo, 1yr, 2yr, 3yr, 5yr, 7yr, 10yr, 20yr, 30yr |
Response
Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.
{
"status": "ok",
"error": null,
"data": {
"date": "2026-10-23",
"yields": {
"1mo": 4.11,
"3mo": 4.22,
"6mo": 4.3,
"1yr": 4.44,
"2yr": 4.69,
"3yr": 4.75,
"5yr": 4.82,
"7yr": 4.89,
"10yr": 5,
"20yr": 5.37,
"30yr": 5.33
},
"realYields": {
"5yr": 2.34,
"7yr": 2.49,
"10yr": 2.66,
"20yr": 2.94,
"30yr": 3.08
},
"bills": 4.22,
"notes": 5,
"bonds": 5.33,
"tips": 2.66,
"frn": 4.22,
"changes": {
"bills": {
"change1d": 0,
"direction": "unchanged"
},
"notes": {
"change1d": 0.04,
"direction": "up"
},
"bonds": {
"change1d": 0.04,
"direction": "up"
},
"tips": {
"change1d": 0.02,
"direction": "up"
},
"frn": {
"change1d": 0,
"direction": "unchanged"
},
"1mo": {
"change1d": 0,
"direction": "unchanged"
},
"3mo": {
"change1d": 0,
"direction": "unchanged"
},
"6mo": {
"change1d": 0.01,
"direction": "up"
},
"1yr": {
"change1d": 0.03,
"direction": "up"
},
"2yr": {
"change1d": 0.04,
"direction": "up"
},
"3yr": {
"change1d": 0.03,
"direction": "up"
},
"5yr": {
"change1d": 0.04,
"direction": "up"
},
"7yr": {
"change1d": 0.03,
"direction": "up"
},
"10yr": {
"change1d": 0.04,
"direction": "up"
},
"20yr": {
"change1d": 0.05,
"direction": "up"
},
"30yr": {
"change1d": 0.04,
"direction": "up"
}
},
"spread10yr2yr": 0.31,
"spread10yr3mo": 0.78,
"spread30yr5yr": 0.51,
"spread5yr2yr": 0.13,
"inverted10yr2yr": false,
"inverted10yr3mo": false,
"curveShape": "normal",
"breakevenInflation": {
"5yr": 2.48,
"7yr": 2.4,
"10yr": 2.34,
"20yr": 2.43,
"30yr": 2.25
}
}
}
Response fields
Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.
| Field | Type | Example | Description |
|---|---|---|---|
date | string | "2026-10-23" | The date of the treasury yields data in YYYY-MM-DD format |
yieldsPremium | object | {...} | Nominal constant-maturity market yields (percent) keyed by maturity: 1mo, 3mo, 6mo, 1yr, 2yr, 3yr, 5yr, 7yr, 10yr, 20yr, 30yr |
1moPremium | number | 4.11 | |
3moPremium | number | 4.22 | |
6moPremium | number | 4.3 | |
1yrPremium | number | 4.44 | |
2yrPremium | number | 4.69 | |
3yrPremium | number | 4.75 | |
5yrPremium | number | 4.82 | |
7yrPremium | number | 4.89 | |
10yrPremium | number | 5 | |
20yrPremium | number | 5.37 | |
30yrPremium | number | 5.33 | |
realYieldsPremium | object | {...} | TIPS real (inflation-indexed) constant-maturity yields (percent) keyed by maturity: 5yr, 7yr, 10yr, 20yr, 30yr |
5yrPremium | number | 2.34 | |
7yrPremium | number | 2.49 | |
10yrPremium | number | 2.66 | |
20yrPremium | number | 2.94 | |
30yrPremium | number | 3.08 | |
billsPremium | number | 4.22 | Benchmark short-term yield (3-month) as percentage |
notesPremium | number | 5 | Benchmark note yield (10-year) as percentage |
bonds | number | 5.33 | Benchmark long bond yield (30-year) as percentage |
tipsPremium | number | 2.66 | Benchmark TIPS real yield (10-year) as percentage |
frnPremium | number | 4.22 | Floating Rate Note reference yield (3-month bill) as percentage |
changesPremium | object | {...} | Day-over-day change statistics, keyed by legacy type and by maturity |
billsPremium | object | {...} | Change data for the 3-month benchmark including change1d and direction |
change1dPremium | number | 0 | One-day percentage point change for the 3-month benchmark |
directionPremium | string | "unchanged" | Direction of change: up, down, or unchanged |
notesPremium | object | {...} | Change data for the 10-year benchmark including change1d and direction |
change1dPremium | number | 0.04 | One-day percentage point change for the 10-year benchmark |
directionPremium | string | "up" | Direction of change: up, down, or unchanged |
bondsPremium | object | {...} | Change data for the 30-year benchmark including change1d and direction |
change1dPremium | number | 0.04 | One-day percentage point change for the 30-year benchmark |
directionPremium | string | "up" | Direction of change: up, down, or unchanged |
tipsPremium | object | {...} | Change data for the 10-year TIPS benchmark including change1d and direction |
change1dPremium | number | 0.02 | One-day percentage point change for the 10-year TIPS benchmark |
directionPremium | string | "up" | Direction of change: up, down, or unchanged |
frnPremium | object | {...} | Change data for the FRN reference (3-month) including change1d and direction |
change1dPremium | number | 0 | One-day percentage point change for the FRN reference |
directionPremium | string | "unchanged" | Direction of change: up, down, or unchanged |
1moPremium | object | {...} | |
change1dPremium | number | 0 | One-day percentage point change for the requested type, when available |
directionPremium | string | "unchanged" | |
3moPremium | object | {...} | |
change1dPremium | number | 0 | One-day percentage point change for the requested type, when available |
directionPremium | string | "unchanged" | |
6moPremium | object | {...} | |
change1dPremium | number | 0.01 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
1yrPremium | object | {...} | |
change1dPremium | number | 0.03 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
2yrPremium | object | {...} | |
change1dPremium | number | 0.04 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
3yrPremium | object | {...} | |
change1dPremium | number | 0.03 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
5yrPremium | object | {...} | |
change1dPremium | number | 0.04 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
7yrPremium | object | {...} | |
change1dPremium | number | 0.03 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
10yrPremium | object | {...} | |
change1dPremium | number | 0.04 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
20yrPremium | object | {...} | |
change1dPremium | number | 0.05 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
30yrPremium | object | {...} | |
change1dPremium | number | 0.04 | One-day percentage point change for the requested type, when available |
directionPremium | string | "up" | |
spread10yr2yrPremium | number | 0.31 | 10-year minus 2-year yield, in percentage points; negative means that part of the curve is inverted; returned with the full curve, not with type |
spread10yr3moPremium | number | 0.78 | 10-year minus 3-month yield, in percentage points (the Fed's preferred recession indicator); returned with the full curve, not with type |
spread30yr5yrPremium | number | 0.51 | 30-year minus 5-year yield, in percentage points; returned with the full curve, not with type |
spread5yr2yrPremium | number | 0.13 | 5-year minus 2-year yield, in percentage points; returned with the full curve, not with type |
inverted10yr2yrPremium | boolean | false | True when the 10-year yield is below the 2-year; returned with the full curve, not with type |
inverted10yr3moPremium | boolean | false | True when the 10-year yield is below the 3-month; returned with the full curve, not with type |
curveShapePremium | string | "normal" | normal, flat (10yr-3mo spread within 0.25 points) or inverted (10yr below 3mo); returned with the full curve, not with type |
Errors
Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.
| Status | Meaning | What to do |
|---|---|---|
400 | Input was rejected | Read error; it names the parameter. |
401 | Key missing or invalid | Check the header name and the key value. |
403 | Key valid, but not permitted | A key restriction or IP allow-list; see key scoping. |
429 | Rate limited, or out of credits | Read error to tell them apart; see rate limits. |
Use cases
- Yield Curve Analysis
- Build yield curves using Treasury rates across different maturities
- Fixed Income Research
- Analyze treasury securities for investment research and portfolio management
- Financial Modeling
- Use risk-free rates for DCF models and derivatives pricing
- Economic Indicators
- Track treasury yields as indicators of economic conditions and Fed policy
Other ways to use Treasury Yields
Set up Treasury Yields on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.
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