---
title: "Treasury securities auctions"
method: GET
path: "/api/v1/treasury/auctions"
tags: ["Public Finance & Government"]
---

# Treasury securities auctions

`GET /api/v1/treasury/auctions`

All Treasury auctions since 1979: date, CUSIP, yield, bid-to-cover, offering amount.

## Query parameters

- `security_type` string — Bill, Note, Bond, TIPS, FRN, CMB
- `limit` integer — Maximum number of records to return.

## Response `200`

Treasury auction records.

- EnvelopeTreasuryAuctionsData
  - `data` TreasuryAuctionsData, required
    - `records` TreasuryAuctionRecord[], required — Array of auction records, including allocation breakdown when disclosed.
      - `auction_date` string, required — Auction date (YYYY-MM-DD).
      - `security_type` string, required — Treasury security type (Bill, Note, Bond, TIPS, FRN, CMB).
      - `security_term` string, required — Security term length (e.g. 4-Week, 10-Year).
      - `cusip` string, required — CUSIP security identifier.
      - `high_yield` string, required — High-yield rate at auction.
      - `bid_to_cover_ratio` string, required — Bid-to-cover ratio at auction.
      - `offering_amt` string, required — Total offering amount (USD).
      - `total_accepted` string, required — Total amount accepted at auction (USD).
      - `allocation_method` string, nullable — Allocation method from FiscalData `auction_format`: 'Single-Price' or 'Multiple-Price'.
      - `allocation_pctage` number, nullable — FiscalData `allocation_pctage`: percentage allocated at the high yield/price (margin allocation).
      - `allocation_pct_competitive` number, nullable — Computed share of total_accepted allocated to competitive bidders (percent, from FiscalData `comp_accepted` / `total_accepted`).
      - `allocation_pct_noncompetitive` number, nullable — Computed share allocated to non-competitive bidders (percent, from FiscalData `noncomp_accepted` / `total_accepted`).
      - `allocation_pct_soma_addon` number, nullable — Computed share added to System Open Market Account (percent, from FiscalData `soma_accepted` / `total_accepted`).
      - `allocation_pct_other` number, nullable — Computed share for FIMA non-competitive (percent, from FiscalData `fima_noncomp_accepted` / `total_accepted`).
      - `issue_date` string, nullable — Security issue date (YYYY-MM-DD) from FiscalData `issue_date`.
      - `maturity_date` string, nullable — Security maturity date (YYYY-MM-DD) from FiscalData `maturity_date`.
      - `interest_rate` number, nullable — Coupon/interest rate (percent) from FiscalData `int_rate`; null for discount bills.
      - `original_security_term` string, nullable — Original security term for a reopening (e.g. 26-Week) from FiscalData `original_security_term`.
      - `original_issue_date` string, nullable — Original issue date for a reopening (YYYY-MM-DD) from FiscalData `original_issue_date`.
    - `total_count` integer, required — Total number of available records across all pages.
    - `total_pages` integer, required — Total number of pages.
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

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