QuantCalc MCP server

• Registry nameapp.quantcalc/retirement-engineverified in the MCP registry

The registry name sits under quantcalc.app. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-18
• Tools7
• Server calls itselfquantcalc
• Server version1.4.0
• Protocol version2025-06-18

On 2026-10-18 the server answered initialize and tools/list without a sign-in. First answer in 341 ms.

• Whether its tools do the product's job has not been judged yet.
• Checked on 6 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 6 so far
• Answeredmeasuring6 of the 7 daily checks it takes to print a share
• Median first answer364 ms
• Space in an agent's context≈ 9,901 tokensthe definitions of all its tools (7), which an agent carries on every turn
• Tool definitionsA · 100 of 100
• Typed results0 of 7 toolsdeclared outputSchema: results come typed, read once

• Every tool passes all six checks.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• run_retirement_projection

  Runs a Monte Carlo retirement projection on the QuantCalc engine and returns the success rate, the ending-portfolio distribution, and the assumptions that produced them. The result states the return model that ran, the number of paths…

• run_tax_aware_projection

  Runs the retirement projection with the household's accounts split by tax type and returns the withdrawal order and Roth-conversion programme the engine selected, its present-value advantage and range against drawing traditional first…

• compare_return_assumptions

  Runs the same plan against several published capital market assumption sets and returns the success rate and median outcome under each, showing how far the answer moves with the return forecast used.

• list_return_assumption_sources

  Returns the published capital market assumption sets the engine carries and which components each publisher provides (returns, volatilities, correlations).

• explain_methodology

  Returns what the QuantCalc engine models and what it deliberately leaves out, including the tax provisions that are out of scope, and links to the published methodology.

• estimate_2026_tax_return

  Estimates a household's 2026 federal and state income tax return from its 2026 income (wages, Social Security, IRA and 401(k) distributions, pensions, Roth conversions, interest, dividends, capital gains and losses), deductions…

• optimize_social_security_claiming

  Searches every Social Security claiming age from 62 (or today's age) to 70 for the household's tax-aware plan: each age's benefit is the given benefit restated by the SSA reduction and delayed-retirement-credit rules, and each age runs…