Name: In Da Mix
Author: divingtechnics

In Da Mix MCP

Gas blending calculator for scuba divers: nitrox, trimix, heliair, heliox, MOD, best mix and fills.

Tool-list grade A Remote · Streamable HTTP No auth needed 9 tools v1.24.30

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What it does

Gas blending calculator for scuba divers: nitrox, trimix, heliair, heliox, MOD, best mix and fills.

Quickstart

# 1 — add it to Claude Code
claude mcp add --scope user --transport http in-da-mix-mcp-2 https://indamix.divingtechnics.com/mcp

# 2 — ask your agent for something these tools do
#   blend, gas_usage, fills_from_bank and 6 more

In Da Mix costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.

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Tool surface

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Use whenever the user asks how to blend, mix, fill or prepare a breathing gas, even if they don't mention In Da Mix. Step-by-step fill plan for blending nitrox, trimix, heliair or heliox into a scuba tank, from what is in it now to the mix and pressure wanted: how much helium and oxygen to add, the order, cooling waits, the O2 test, the air top-up, and booster bars. Partial pressure or continuous,

Parameter	Type	Required	Notes
mix_type	string	yes	nitrox (O2 + air), trimix (He + O2 + air), heliair (He + air), heliox (He + O2).
start_pressure	number	no	Pressure already in the tank, in pressure_unit. 0 = empty. This changes the result a lot: if the user did not give it, ask before calling. If you call without it, the tool assumes an empty tank and li
start_o2_percent	number	no	O2 percent of the gas already in the tank (21 for air).
start_he_percent	number	no	He percent of the gas already in the tank.
target_pressure	number	yes	Fill pressure wanted, in pressure_unit (e.g. 200 or 232 bar, 3000 psi).
target_o2_percent	number	no	O2 percent of the mix wanted (nitrox, trimix, heliox).
target_he_percent	number	no	He percent of the mix wanted (trimix, heliair, heliox).
how	string	no	partial_pressure: add pure He and O2 to the tank, then top up with air. continuous: He / O2 go into the compressor intake (a premix stream).
helium_first	boolean	no	Partial pressure: add helium before oxygen (trimix, heliox).
use_booster	boolean	no	A gas booster is available: banks that can't decant high enough are boosted. With DIVESOFT_REAL_GAS it changes the plan; with other methods it only plans the gas.
tank_volume_l	number	no	Water volume of the tank being filled, litres (a twin 12 = 24). Used for gas litres and bank use.
method	string	no	Calculation method (equation of state), as in the app. Default from the In Da Mix settings (see list_methods for the current default); listed in assumed. IDEAL_GAS_DALTON is the simple ideal-gas met
temperature	number	no	Fill-site (ambient) temperature, in temperature_unit. Default from the In Da Mix settings; listed in assumed.
heat_correction	boolean	no	Correct for the heating of the gas while filling.
dive_mode	string	no	Open circuit (OC) or closed-circuit rebreather (CCR). Sets which defaults apply (from the In Da Mix settings: ppO2, END, density, O2 narcotic). The values used are listed in assumed.
banks	object	no	Source banks (storage cylinders). Any bank not given is taken from the In Da Mix settings and listed in assumed.
pressure_unit	string	no	Unit of every pressure in the question and the answer.
depth_unit	string	no	Unit of every depth in the question and the answer.
temperature_unit	string	no	Unit of the fill temperature.
language	string	no	Language of the texts in the answer: en (English) or hr (Croatian). Use the user's language.

For one blend: the litres of each gas it takes from the banks, each bank's pressure afterwards, and whether a bank can still decant (or needs boosting, or runs short). Same inputs as blend, plus the banks. Use for "how much helium will this fill use", "is my O2 bank enough for this fill", "koliko helija trošim za ovu mješavinu", "koliko plina ostaje u bankama". Banks not given come from the settin

Parameter	Type	Required	Notes
mix_type	string	yes	nitrox (O2 + air), trimix (He + O2 + air), heliair (He + air), heliox (He + O2).
start_pressure	number	no	Pressure already in the tank, in pressure_unit. 0 = empty. This changes the result a lot: if the user did not give it, ask before calling. If you call without it, the tool assumes an empty tank and li
start_o2_percent	number	no	O2 percent of the gas already in the tank (21 for air).
start_he_percent	number	no	He percent of the gas already in the tank.
target_pressure	number	yes	Fill pressure wanted, in pressure_unit (e.g. 200 or 232 bar, 3000 psi).
target_o2_percent	number	no	O2 percent of the mix wanted (nitrox, trimix, heliox).
target_he_percent	number	no	He percent of the mix wanted (trimix, heliair, heliox).
how	string	no	partial_pressure: add pure He and O2 to the tank, then top up with air. continuous: He / O2 go into the compressor intake (a premix stream).
helium_first	boolean	no	Partial pressure: add helium before oxygen (trimix, heliox).
use_booster	boolean	no	A gas booster is available: banks that can't decant high enough are boosted. With DIVESOFT_REAL_GAS it changes the plan; with other methods it only plans the gas.
tank_volume_l	number	no	Water volume of the tank being filled, litres (a twin 12 = 24). Used for gas litres and bank use.
method	string	no	Calculation method (equation of state), as in the app. Default from the In Da Mix settings (see list_methods for the current default); listed in assumed. IDEAL_GAS_DALTON is the simple ideal-gas met
temperature	number	no	Fill-site (ambient) temperature, in temperature_unit. Default from the In Da Mix settings; listed in assumed.
heat_correction	boolean	no	Correct for the heating of the gas while filling.
dive_mode	string	no	Open circuit (OC) or closed-circuit rebreather (CCR). Sets which defaults apply (from the In Da Mix settings: ppO2, END, density, O2 narcotic). The values used are listed in assumed.
banks	object	no	Source banks (storage cylinders). Any bank not given is taken from the In Da Mix settings and listed in assumed.
pressure_unit	string	no	Unit of every pressure in the question and the answer.
depth_unit	string	no	Unit of every depth in the question and the answer.
temperature_unit	string	no	Unit of the fill temperature.
language	string	no	Language of the texts in the answer: en (English) or hr (Croatian). Use the user's language.

How many identical fills the source banks give before a bank can't supply the next one, and why it stops (bank down to the minimum pressure, or it can't decant high enough without a booster). Every tank is assumed to start the same (start_pressure / mix). Use for "how many tanks can I fill with NX32 from my 50 L O2 bank at 180 bar", "how many trimix fills can I make", "koliko boca mogu napuniti",

Parameter	Type	Required	Notes
mix_type	string	yes	nitrox, trimix, heliair, heliox, or top_up (a ready-made supply gas from the top-up bank).
start_pressure	number	no	Pressure already in the tank, in pressure_unit. 0 = empty. This changes the result a lot: if the user did not give it, ask before calling. If you call without it, the tool assumes an empty tank and li
start_o2_percent	number	no	O2 percent of the gas already in the tank (21 for air).
start_he_percent	number	no	He percent of the gas already in the tank.
target_pressure	number	yes	Fill pressure wanted, in pressure_unit (e.g. 200 or 232 bar, 3000 psi).
target_o2_percent	number	no	O2 percent of the mix wanted (nitrox, trimix, heliox).
target_he_percent	number	no	He percent of the mix wanted (trimix, heliair, heliox).
how	string	no	partial_pressure: add pure He and O2 to the tank, then top up with air. continuous: He / O2 go into the compressor intake (a premix stream).
helium_first	boolean	no	Partial pressure: add helium before oxygen (trimix, heliox).
use_booster	boolean	no	A gas booster is available: banks that can't decant high enough are boosted. With DIVESOFT_REAL_GAS it changes the plan; with other methods it only plans the gas.
tank_volume_l	number	no	Water volume of the tank being filled, litres (a twin 12 = 24). Used for gas litres and bank use.
method	string	no	Calculation method (equation of state), as in the app. Default from the In Da Mix settings (see list_methods for the current default); listed in assumed. IDEAL_GAS_DALTON is the simple ideal-gas met
temperature	number	no	Fill-site (ambient) temperature, in temperature_unit. Default from the In Da Mix settings; listed in assumed.
heat_correction	boolean	no	Correct for the heating of the gas while filling.
dive_mode	string	no	Open circuit (OC) or closed-circuit rebreather (CCR). Sets which defaults apply (from the In Da Mix settings: ppO2, END, density, O2 narcotic). The values used are listed in assumed.
supply_o2_percent	number	no	O2 percent of the ready-made supply gas (20.9 for air, 32 for EAN32).
supply_he_percent	number	no	He percent of the supply gas.
banks	object	no	Source banks (storage cylinders). Any bank not given is taken from the In Da Mix settings and listed in assumed.
min_bank_pressure	number	no	A bank isn't used below this pressure (regulator / compressor intake / booster inlet), in pressure_unit. Default 10 bar.
max_fills	integer	no	Stop counting here.

Top a tank up with a ready-made supply gas (air, EAN32, a trimix premix…): the pressure added, the mix you end up with, its MOD, and the gas density at a depth. For a ready-made supply gas; to add pure oxygen or helium use what_if or blend. Use for "I have 50 bar of EAN32 left, what do I get if I top up with air to 200", "dopuni mi bocu s 50 bara EAN32 zrakom do 220 bara", "koji će biti konačni po

Parameter	Type	Required	Notes
start_pressure	number	no	Pressure already in the tank, in pressure_unit. 0 = empty. This changes the result a lot: if the user did not give it, ask before calling. If you call without it, the tool assumes an empty tank and li
start_o2_percent	number	no	O2 percent of the gas already in the tank (21 for air).
start_he_percent	number	no	He percent of the gas already in the tank.
target_pressure	number	yes	Fill pressure wanted, in pressure_unit (e.g. 200 or 232 bar, 3000 psi).
supply_o2_percent	number	yes	O2 percent of the ready-made supply gas (20.9 for air, 32 for EAN32).
supply_he_percent	number	no	He percent of the supply gas.
target_depth	number	no	Depth for the gas density, in depth_unit. Default 30 m.
use_booster	boolean	no	A gas booster is available: banks that can't decant high enough are boosted. With DIVESOFT_REAL_GAS it changes the plan; with other methods it only plans the gas.
tank_volume_l	number	no	Water volume of the tank being filled, litres (a twin 12 = 24). Used for gas litres and bank use.
method	string	no	Calculation method (equation of state), as in the app. Default from the In Da Mix settings (see list_methods for the current default); listed in assumed. IDEAL_GAS_DALTON is the simple ideal-gas met
temperature	number	no	Fill-site (ambient) temperature, in temperature_unit. Default from the In Da Mix settings; listed in assumed.
heat_correction	boolean	no	Correct for the heating of the gas while filling.
dive_mode	string	no	Open circuit (OC) or closed-circuit rebreather (CCR). Sets which defaults apply (from the In Da Mix settings: ppO2, END, density, O2 narcotic). The values used are listed in assumed.
banks	object	no	Source banks (storage cylinders). Any bank not given is taken from the In Da Mix settings and listed in assumed.
pressure_unit	string	no	Unit of every pressure in the question and the answer.
depth_unit	string	no	Unit of every depth in the question and the answer.
temperature_unit	string	no	Unit of the fill temperature.
language	string	no	Language of the texts in the answer: en (English) or hr (Croatian). Use the user's language.
include_steps	boolean	no	Also return the app's ƒx steps ("How this was calculated"): every formula with its numbers. Long: only when the user asks how it was calculated.

Use this FIRST when the user asks which breathing gas to use for a planned depth, or to select, recommend, optimise or compare one, even if they don't mention In Da Mix. The best nitrox or trimix for a planned depth within the diver's limits, as an open-circuit bottom gas or as CCR diluent (dive_mode CCR for any rebreather question): the richest O2 that keeps the ppO2 limit (rounded down), and for

Parameter	Type	Required	Notes
depth	number	yes	Planned maximum depth, in depth_unit.
gas_type	string	no	nitrox or trimix. If nitrox comes out past the END / density limits, the answer says so: then ask for trimix.
ppo2_bar	number	no	ppO2 limit, bar. Default from the In Da Mix settings for the dive mode; the value used is listed in assumed.
max_end	number	no	Maximum END, in depth_unit. Default from the In Da Mix settings for the dive mode; the value used is listed in assumed.
max_density_g_per_l	number	no	Maximum gas density, g/L. Default from the In Da Mix settings for the dive mode; the value used is listed in assumed.
o2_narcotic	boolean	no	Count O2 as narcotic in the END. Default from the In Da Mix settings for the dive mode; the value used is listed in assumed.
dive_mode	string	no	Open circuit (OC) or closed-circuit rebreather (CCR). Sets which defaults apply (from the In Da Mix settings: ppO2, END, density, O2 narcotic). The values used are listed in assumed.
depth_unit	string	no	Unit of every depth in the question and the answer.
language	string	no	Language of the texts in the answer: en (English) or hr (Croatian). Use the user's language.
include_steps	boolean	no	Also return the app's ƒx steps ("How this was calculated"): every formula with its numbers. Long: only when the user asks how it was calculated.

Use whenever the user asks how deep a gas can go or checks an existing breathing gas (nitrox, trimix, CCR diluent) against a depth, even if they don't mention In Da Mix; never work a MOD out by hand. Maximum operating depth of a breathing gas: the MOD by the ppO2 limit (as on a cylinder label), and for hypoxic gases the minimum depth. With complete: true also the complete MOD, the deepest depth wi

Parameter	Type	Required	Notes
o2_percent	number	yes	Oxygen in the gas, percent (32 for EAN32, 18 for trimix 18/45).
he_percent	number	no	Helium in the gas, percent (0 for nitrox).
ppo2_bar	number	no	ppO2 limit, bar. Default from the In Da Mix settings for the dive mode; the value used is listed in assumed.
max_end	number	no	Maximum END for the complete MOD, in depth_unit. Default from the In Da Mix settings for the dive mode; the value used is listed in assumed.
max_density_g_per_l	number	no	Maximum gas density for the complete MOD, g/L. Default from the In Da Mix settings for the dive mode; the value used is listed in assumed.
o2_narcotic	boolean	no	Count O2 as narcotic in the END. Default from the In Da Mix settings for the dive mode; the value used is listed in assumed.
complete	boolean	no	Also the complete MOD (within the END and gas density limits too). Leave it out at first; set true only when the user says yes to it. Giving max_end or max_density_g_per_l turns it on.
dive_mode	string	no	Open circuit (OC) or closed-circuit rebreather (CCR). Sets which defaults apply (from the In Da Mix settings: ppO2, END, density, O2 narcotic). The values used are listed in assumed.
depth_unit	string	no	Unit of every depth in the question and the answer.
language	string	no	Language of the texts in the answer: en (English) or hr (Croatian). Use the user's language.
include_steps	boolean	no	Also return the app's ƒx steps ("How this was calculated"): every formula with its numbers. Long: only when the user asks how it was calculated.

What mix you get when you add given pressures of oxygen, helium and/or air to what is in the tank (the app's What If): the pressure after each addition, the resulting mix, its MOD, EAD, END and gas density. Use for "what if" additions: "I have 50 bar of air, what do I get if I add 30 bar of O2 and top up with 120 bar of air", "what if I add 40 bar of helium", "što dobijem ako dodam 30 bara kisika"

Parameter	Type	Required	Notes
start_pressure	number	no	Pressure already in the tank, in pressure_unit. 0 = empty. This changes the result a lot: if the user did not give it, ask before calling. If you call without it, the tool assumes an empty tank and li
start_o2_percent	number	no	O2 percent of the gas already in the tank (21 for air).
start_he_percent	number	no	He percent of the gas already in the tank.
add_oxygen	number	no	Pressure of pure oxygen added, in pressure_unit.
add_helium	number	no	Pressure of pure helium added, in pressure_unit.
add_air	number	no	Pressure of air added, in pressure_unit.
helium_first	boolean	no	Partial pressure: add helium before oxygen (trimix, heliox).
method	string	no	Calculation method (equation of state), as in the app. Default from the In Da Mix settings (see list_methods for the current default); listed in assumed. IDEAL_GAS_DALTON is the simple ideal-gas met
temperature	number	no	Fill-site (ambient) temperature, in temperature_unit. Default from the In Da Mix settings; listed in assumed.
target_depth	number	no	Depth for the gas density, in depth_unit. Default 30 m.
dive_mode	string	no	Open circuit (OC) or closed-circuit rebreather (CCR). Sets which defaults apply (from the In Da Mix settings: ppO2, END, density, O2 narcotic). The values used are listed in assumed.
pressure_unit	string	no	Unit of every pressure in the question and the answer.
depth_unit	string	no	Unit of every depth in the question and the answer.
temperature_unit	string	no	Unit of the fill temperature.
language	string	no	Language of the texts in the answer: en (English) or hr (Croatian). Use the user's language.
include_steps	boolean	no	Also return the app's ƒx steps ("How this was calculated"): every formula with its numbers. Long: only when the user asks how it was calculated.

Decanting one gas (oxygen, or helium) from source cylinders into a small cylinder without a compressor, as the app's Decant: a cascade, each cylinder equalised in turn (ideal gas). plan refills: one refill or a series (e.g. a CCR O2 cylinder from 75 to 150 bar after every dive): which cylinders each refill uses, the pressures after, how many refills the cylinders give, why it stops, and how many c

Parameter	Type	Required	Notes
plan	string	no	refills: the tank goes from start_pressure to target_pressure at every refill. diving_days: the app's Decant planner (use per day, dives a day).
tank_volume_l	number	no	Water volume of the cylinder being refilled, litres (e.g. a rebreather's 2 or 3 L).
start_pressure	number	no	refills: the tank's pressure before each refill (what is left after a dive), in pressure_unit. 0 = empty. This changes the result a lot: if the user did not give it, ask before calling. If you call wi
target_pressure	number	no	refills: the pressure wanted after each refill, in pressure_unit (needed). diving_days: the pressure it is filled to at most.
gas_o2_percent	number	no	O2 percent of the gas decanted (100 for oxygen, 0 for helium); only names it in the answer.
gas_he_percent	number	no	He percent of that gas.
sources	array	no	The source cylinders, each with its volume and pressure; several identical ones: one entry with count. refills: needed; opened lowest pressure first. diving_days: decanted in this order; left out = th
refills	integer	no	refills: how many refills in a row are wanted (e.g. dives − 1). Left out: as many as the cylinders give.
dives_per_day	integer	no	diving_days: dives a day.
min_pressure_before_dive	number	no	diving_days: the cylinder needs at least this before a dive, in pressure_unit.
use_per_day_min	number	no	diving_days: lowest O2 use a day, in pressure_unit of the cylinder.
use_per_day_max	number	no	diving_days: highest O2 use a day. Give one use: both are taken as it.
fill_before_every_dive	boolean	no	diving_days: refill before every dive (true) or once a day (false).
min_pressure_to_start_day	number	no	diving_days, daily fill: the cylinder must start the day with at least this. Default: min_pressure_before_dive + use_per_day_max × (dives_per_day − 1) / dives_per_day.
pressure_unit	string	no	Unit of every pressure in the question and the answer.
language	string	no	Language of the texts in the answer: en (English) or hr (Croatian). Use the user's language.
include_steps	boolean	no	Also return the app's ƒx steps ("How this was calculated"): every formula with its numbers. Long: only when the user asks how it was calculated.

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. Use for "which gas models are supported", "ideal gas versus Peng-Robinson", "koje modele izračuna podržava aplikacija", "razlik

No parameter schema on file.

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Nothing here is billable: mcprush charges nothing to install In Da Mix or to call it, at any volume.

ATool-list grade · score 96 / 100

Release 1.24.30 · scanned 20 Oct 2026

Graded from the tools this server lists, not from its source code.

Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.

Threat score100

Client score96

Findings0 threat · 0 capability

Capabilityminimal

Coveragemanifest

Verificationnot in this report

Surface digestc7f049e6ebf6f176a2a6ca5c302eae366059a71ef00f0b8f7333c3243b2320f7

Score vectorthreat 100 → client 96

Term	Level	What it prices	Points
capability-exposure	minimal	capability blast radius (minimal) — client exposure if the model is manipulated	−0
coverage-honesty	manifest	inspection depth (manifest) — how much of the target the scan could see	−4

score = clamp(round(threatScore − E_cap − E_ver − E_cov), 0, 100). No model, no opinion, no network call at scoring time: the same methodology version against the same bytes always produces this number, and every line above is a field of the report rather than a summary of it.

What the scan could actually read

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The scan read each tool’s name, description, input schema and annotations exactly as the server listed them the last time it answered us; no code was reviewed. We ask the server again about once a month, and a list that changed is graded again.

Tool surfaceread

Implementation sourcenot available

Package metadatanot available

Live transportnot available

The implementation source was not read — this reflects the declared tool metadata only.

Capability — what it could do if the model were manipulated

Tags derived from each tool’s schema and the implementation, not from what the tool calls itself. minimal is the level these add up to.

Tool	Capability tags	Why the tag was assigned
blend	no tags
gas_usage	no tags
fills_from_bank	no tags
top_up	no tags
best_mix	no tags
mod	no tags
what_if	no tags
decant	no tags
list_methods	no tags

Toxic-flow graph

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The public result for this release does not print the flow graph, so there is nothing to show here. That is not the same as "no paths were found": what the scan did read is above, under coverage.

Supply chain and provenance

Integrityfirst-seen

Surface digestc7f049e6ebf6f176

Scanned2026-10-20

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Every result on this tab comes from one deterministic pass over the published package — offline, rule by rule, and auditable line by line above. Same methodology version, same bytes, same score.

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In Da Mix MCP

What it does

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See also