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US Treasury Auction Calendar API
x402
US Treasury Auction Calendar API is a paid API for AI agents from market-calendar-api.onrender.com, paid per call via x402, $0.013/call, status down (last checked 2026-10-31).
Lists US Treasury auctions (bills, notes, bonds, TIPS, FRNs) within a date range, including announced upcoming auctions and historical results with yield/rate and bid-to-cover data.
Price / call$0.013
Success—
StatusDown
How this service works
Lists US Treasury auctions (bills, notes, bonds, TIPS, FRNs) in a date range: announced upcoming auctions and results of past ones (high yield/rate, bid-to-cover).
Output
A list of Treasury auction records within the requested date range. Each record includes the security type (bill, note, bond, TIPS, FRN), the term (e.g. 4-Week, 10-Year), the auction date, and — for completed auctions — the high yield or high rate and the bid-to-cover ratio. Upcoming announced auctions appear without result fields.
Example use cases
Weekly Treasury auction briefing
“Give me a list of all US Treasury auctions happening in the next two weeks, from today through July 20, 2025, so I can see what's coming up in the bill and note space.”
Post-auction yield analysis
“What were the high yields and bid-to-cover ratios for all Treasury auctions that took place last month, from June 1 to June 30, 2025? I want to track demand trends.”
Filtering auctions by term
“Show me every announced 2-Year Treasury note auction scheduled between August 1 and September 30, 2025, including any results if they've already settled.”
Technical details
Endpoint
GEThttps://market-calendar-api.onrender.com/v1/auctions?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a list of multiple Treasury auctions across a date window, especially to build calendars, track bid-to-cover trends, or compare upcoming vs. completed auctions. Prefer the sibling 'next auction' endpoint when you only need the single next upcoming event for a specific term. This endpoint is best for date-range queries, historical result retrieval, and multi-term survey across a period.
Side effects
- Date range exceeds 92-day maximum — API rejects with an error
- Invalid date format (not YYYY-MM-DD) causes a 400 bad request
- Unknown or misspelled term value returns empty results or an error
- No auctions in the specified range returns an empty list
- Service unavailable due to Render.com cold start or downtime
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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