---
title: "I Spread"
method: POST
path: "/quantlib/solver/finance/i-spread"
tags: ["quantlib-solver"]
---

# I Spread

`POST /quantlib/solver/finance/i-spread`

## Request

- Base URL: `https://api.fincept.in` (the document declares no server; this is the origin it was published from)
- URL: `https://api.fincept.in/quantlib/solver/finance/i-spread`
- Auth: API key in header `X-API-Key`

Calculate I-spread (bond yield vs swap rate)

## Request body

- ISpreadRequest
  - `bond_yield` number, required
  - `swap_rate` number, required

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/fincept/apis/fincept-api.md) · [All operations](https://skmtc.dev/fincept/apis/fincept-api/llms.txt) · [OpenAPI document](https://skmtc.dev/fincept/apis/fincept-api/revisions/e9c0076ea55a?raw)