# Helious Rates and curve API

**Canonical:** https://apis.io/apis/helious-io/helious-io-rates-and-curve-api/  
**Provider:** Helious — https://apis.io/providers/helious-io/  
**Base URL:** https://api.helious.io  
**Documentation:** https://helious.io/developers/

Helious Rates and curve API is one of 12 APIs that [Helious](https://apis.io/providers/helious-io/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 2 JSON Schema definitions. Tagged areas include Rates and curve. The published artifact set on APIs.io includes an OpenAPI specification and 2 JSON Schemas.

Live Treasury yields, spreads, the curve regime and its history.

## Operations (8)

| Method | Path | Summary |
|---|---|---|
| GET | `/v1/treasury` | The whole Treasury curve, 3M bill to 30Y bond, in one call |
| GET | `/v1/rates` | Treasury yields, spreads and the curve regime |
| GET | `/v1/curve` | Curve regime now, plus every past flip |
| GET | `/v1/yields` | Treasury yields per session, back to 2000 |
| GET | `/api/seo/rates` | US Treasury curve, policy and market rates |
| GET | `/v1/context` | Why the market is moving: cross-asset context in one call |
| GET | `/v1/rate-odds` | Fed rate cut and hike odds |
| GET | `/v1/rate-path` | Every listed SOFR and fed funds contract, priced now and a year ago |

## Machine-readable artifacts (3)

- **OpenAPI** — https://artifacts.apis.io/helious-io/openapi/helious-io-rates-and-curve-api-openapi.yml
- **JSONSchema** — https://artifacts.apis.io/helious-io/json-schema/helious-io-feed-item-schema.json
- **JSONSchema** — https://artifacts.apis.io/helious-io/json-schema/helious-io-envelope-schema.json

## Other Helious APIs (11)

- [Helious Agent sign-in and A2A API](https://apis.io/apis/helious-io/helious-io-agent-sign-in-and-a2a-api/)
- [Helious Ask Helious API](https://apis.io/apis/helious-io/helious-io-ask-helious-api/)
- [Helious Boards API](https://apis.io/apis/helious-io/helious-io-boards-api/)
- [Helious Economic data API](https://apis.io/apis/helious-io/helious-io-economic-data-api/)
- [Helious News and feed API](https://apis.io/apis/helious-io/helious-io-news-and-feed-api/)
- [Helious Reference API](https://apis.io/apis/helious-io/helious-io-reference-api/)
- [Helious Series API](https://apis.io/apis/helious-io/helious-io-series-api/)
- [Helious The Fed API](https://apis.io/apis/helious-io/helious-io-the-fed-api/)
- [Helious The squawk API](https://apis.io/apis/helious-io/helious-io-the-squawk-api/)
- [Helious Treasury auctions API](https://apis.io/apis/helious-io/helious-io-treasury-auctions-api/)
- [Helious Your key API](https://apis.io/apis/helious-io/helious-io-your-key-api/)

## Tags

Rates and curve

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/helious-io/helious-io-rates-and-curve-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/helious-io/.