32 APIs · REST + MCP
Deterministic financial calculation APIs.
Statutes and tables in, dollars out. Same input, same answer, every time. No LLM anywhere in the calculation path. Tax, estate, retirement, and compliance math you can put in front of a client.
Every response carries its parameter vintage, formula version, and statute citations — and a tier flag so you always know whether a number is beta (tests pass) or verified (confirmed against primary sources).
Four suites, one calculation core
The same pure functions power the REST API and the MCP servers. One implementation, two distribution surfaces — so an AI agent and your backend get identical, statute-cited numbers.
Estate Planning Suite
The complete estate-planning calculation workflow, in order.
Explore the suite →Premium Tax Suite
High-stakes tax calculations most tools get wrong.
Explore the suite →Retirement & International Suite
Retirement income decisions, US and abroad.
Explore the suite →Compliance & Data Suite
Regulatory rules and reference data as clean APIs.
Explore the suite →No LLM in the math
Language models are for reading and routing. The arithmetic is deterministic code over versioned parameter tables — the same input always returns the same answer, and every number is reproducible from a published statute or rate table.
Reproducible
Pure functions, versioned parameters. data_as_of and formula_version in every response.
Cited
Each result ships the statutes and rev-procs behind it. Verify any number yourself.
Honest
Where a table isn't confidently citable we return a structured "not loaded," never a wrong number.
Pricing
Usage-based per API, with suite bundles. During beta, APIs are free to call with an API key — metered pricing switches on per API only once it reaches verified tier.
Estate Planning Suite
Estate Planning Suite bundle: $699/mo for the full suite.
Premium Tax Suite
Volume and suite pricing available.
Retirement & International Suite
Volume and suite pricing available.
Compliance & Data Suite
Volume and suite pricing available.