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StationFX 2-Year U.S. Treasury Yield (Constant Maturity)
x402
StationFX 2-Year U.S. Treasury Yield (Constant Maturity) is a paid API for AI agents from stationfx.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Returns daily 2-year U.S. Treasury constant maturity yield with derived metrics including z-scores, percentile ranks, rolling averages, and period-over-period changes.
Price / call$0.005
Success—
StatusUnknown
How this service works
Short-end U.S. Treasury yield most sensitive to Fed policy expectations. Moves closely with fed funds rate expectations. Primary input for yield curve spread calculations and rate cycle timing. Daily frequency with full derived metrics.
Output
A JSON array of daily observations, each containing the raw 2-year Treasury yield value, month-over-month and year-over-year absolute and percentage changes, 12-month and 5-year z-scores, 5-year percentile rank, 3-month and 12-month rolling averages, and a binary above-trend indicator — all covering the requested date range.
Example use cases
Yield curve spread monitoring
“Get me today's 2-year Treasury yield from StationFX along with its 5-year percentile rank — I need to compare it against the 10-year to calculate the 2s10s spread and see if it's still inverted.”
Fed rate cycle timing signal
“Pull the last 6 months of 2-year Treasury yield data from StationFX with month-over-month changes and the 12-month z-score — I want to track how the short end is pricing in Fed pivot expectations.”
Historical rate regime comparison
“Fetch 2-year Treasury yield data from StationFX from 2022-01-01 to 2023-12-31 in JSON format, including rolling 3-month and 12-month averages, so I can compare the rate hiking cycle to where we are now.”
Technical details
Endpoint
GEThttps://stationfx.com/economic-data/interest-rates/market-yield-on-u-s-treasury-securities-at-2-year-constant-maturity-quoted-on-an-investment-basis?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need the short end of the U.S. Treasury yield curve — specifically the 2-year constant maturity rate — especially for Fed policy sensitivity analysis, yield curve spread calculations (e.g. 2s10s), or rate cycle timing. It provides pre-computed derived metrics (z-scores, percentile ranks, rolling averages) that would otherwise require separate computation, making it more useful than raw FRED data for agent workflows. Prefer this over longer-maturity Treasury endpoints when your analysis focuses on near-term monetary policy expectations rather than long-run inflation or growth premia.
Side effects
- Invalid date format returns a 400-level error — use YYYY-MM-DD
- Requesting future dates returns empty data or an error
- Unsupported fmt enum value may return an error or unexpected format
- Network or payment authorization failure returns a 402 if x402 payment is not resolved
- Very large date ranges may result in slow responses or truncated payloads
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"properties": {
"data": {
"type": "array",
"items": {
"type": "object",
"properties": {
"date": {
"type": "string",
"description": "Observation date YYYY-MM-DD"
},
"value": {
"type": "number",
"description": "Raw observed value in series units"
},
"mom_pct": {
"type": "number",
"description": "Month-over-month % change"
},
"yoy_pct": {
"type": "number",
"description": "Year-over-year % change"
},
"zscore_5y": {
"type": "number",
"description": "Z-score relative to trailing 5 years"
},
"mom_change": {
"type": "number",
"description": "Month-over-month absolute change"
},
"yoy_change": {
"type": "number",
"description": "Year-over-year absolute change"
},
"zscore_12m": {
"type": "number",
"description": "Z-score relative to trailing 12 months"
},
"above_trend": {
"type": "integer",
"description": "1 if value is above long-run trend, else 0"
},
"pct_rank_5y": {
"type": "number",
"description": "Percentile rank over trailing 5 years (0-100)"
},
"rolling_3m_avg": {
"type": "number",
"description": "3-month rolling average"
},
"rolling_12m_avg": {
"type": "number",
"description": "12-month rolling average"
},
"trend_direction": {
"type": "integer",
"description": "Trend: 1 rising, -1 falling, 0 flat"
}
}
},
"description": "Observations ordered by date ascending"
},
"meta": {
"type": "object",
"description": "Series metadata: source_key (FRED series ID), units, frequency (D/W/M/Q/A), date_from, date_to, fields"
}
},
"description": "Station f(x) response with metadata and pre-computed derived metrics"
},
"example": {
"data": [
{
"date": "2024-01-01",
"value": 5.33,
"mom_pct": 0,
"yoy_change": 0.5,
"zscore_12m": 1.2,
"trend_direction": 1
}
],
"meta": {
"frequency": "D",
"source_key": "DGS2"
}
}
}Tags
x402
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