---
title: "Calculation methods"
method: POST
path: "/api/v1/list_methods"
---

# Calculation methods

`POST /api/v1/list_methods`

## Request

- Base URL: `https://indamix.divingtechnics.com`
- URL: `https://indamix.divingtechnics.com/api/v1/list_methods`
- Auth: none required

The calculation methods (equations of state) In Da Mix offers, with their ids for the method input. The current default is in the `default` field. Use when the user asks about calculation models: ideal versus real gas, compressibility, Z-factors, Peng-Robinson, MultiDeco.

## Request body

- object

## Response `200`

The calculation: summary (the steps or result in the user's language), the numbers, and the analyser disclaimer to pass on. If error is set, the calculation was refused; explain message to the user.

- Answer
  - `summary` string, required: The answer as text lines, in the requested language.
  - `disclaimer` string: Always pass this on to the user.
  - `version` string: The In Da Mix version that calculated this, v<version>.<build>.
  - `excel_url` string: Link to the Excel workbook of this calculation (the app's View in Excel). Give it to the user when they want a spreadsheet or the full working.
  - `fx_steps` object[]: With include_steps: the app's ƒx steps (title, formula, values, result, detail) in the user's language.
  - `terms` string: The terms of use notice with its link: show it to the user once, with the first In Da Mix answer of a conversation.
  - `error` string: Set when the calculation was refused (an engine error code or INVALID_INPUT).
  - `message` string: Why it was refused, in the user's language.

## Other responses

- `400`: Invalid or missing input; message says what is needed.

---

[API](https://skmtc.dev/divingtechnics/apis/in-da-mix-gas-blending-calculator.md) · [All operations](https://skmtc.dev/divingtechnics/apis/in-da-mix-gas-blending-calculator/llms.txt) · [OpenAPI document](https://skmtc.dev/divingtechnics/apis/in-da-mix-gas-blending-calculator/revisions/d1610faf1201?raw)