---
title: "US overnight reference rates (SOFR/repo complex)"
method: GET
path: "/api/v2/fixed-income/treasury/reference-rates"
tags: ["Fixed Income"]
---

# US overnight reference rates (SOFR/repo complex)

`GET /api/v2/fixed-income/treasury/reference-rates`

The Federal Reserve Bank of New York US overnight reference-rate complex for the latest publication: secured SOFR / BGCR / TGCR (Treasury repo) and unsecured EFFR / OBFR (rate, volume, 1st/99th percentiles), plus the SOFR 30/90/180-day averages + SOFR index, and derived funding spreads (SOFR-EFFR basis, secured-vs-unsecured) in bps.

## Response `200`

Latest overnight rates, SOFR averages/index, and funding spreads.

- EnvelopeReferenceRatesData
  - `data` ReferenceRatesData, required — The FRBNY US overnight reference-rate complex for the latest publication.
    - `rates` object, required — SOFR / BGCR / TGCR / EFFR / OBFR latest observations.
    - `sofr_averages` SofrAverages — SOFR compounded averages + the SOFR index.
      - `effective_date` string, nullable
      - `average_30day` number, nullable
      - `average_90day` number, nullable
      - `average_180day` number, nullable
      - `index` number, nullable
      - `revised` boolean — True when FRBNY flagged the averages/index as revised.
    - `spreads` FundingSpreads, required — Derived overnight funding spreads (basis points).
      - `sofr_effr_bps` number, nullable — SOFR minus EFFR, bps.
      - `secured_unsecured_bps` number, nullable — SOFR minus OBFR (secured vs unsecured), bps.
  - `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.
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

[API](https://skmtc.net/sugra/apis/sugra-api.md) · [All operations](https://skmtc.net/sugra/apis/sugra-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/sugra/sugra-api/versions/4e2740743eb4/schema)