The marketplace for governed decision APIs
License ready-made decision APIs compiled from the primary regulation by verified publishers. Call them from any system or AI agent and get a deterministic answer with the reasons behind it.
Find the decision you need to automate
Live policy suites
Brazil Consumption Tax Reform — Transition Regime Determination (SB1)
U.S. Organizational GHG Accounting — Stationary Combustion
EU VAT
UK VAT
US Sales Tax
EU GDPR
UK Public Procurement
US Payroll Tax & Employment
EU AI Act
HS Code Classification
Not just an answer — a governed decision
Every package on the marketplace runs on the Sertainly decision runtime. That means the same guarantees, whichever publisher built it.
No LLM in the loop. The same case always returns the same answer — safe to put in production and in front of auditors.
Calls route to the rule version in force on the transaction date. Ask what the answer was in March, not just today.
Every response carries reason codes, evidence requirements, and a decision trace you own.
Subscribe to a suite, mint a key, and call every decision API in it — metered, with your own usage view.
Every API on the marketplace
Brazil Consumption Tax Reform · Transition Regime Determination
Decides which tax regime, rates, and charge status apply to a Brazilian transaction across the 2026-2033 consumption tax transition.
Brazil 2026 IBS/CBS Collection Relief & Obligation Commencement
Decides IBS/CBS collection relief, Cofins/PIS offset treatment, and CNPJ/e-document obligation timing for 2026 taxable events in Brazil.
EPA Stationary Combustion · GHG Emissions Quantification
Decides Scope 1 CO2, CH4, and N2O emissions from owned or leased boilers, furnaces, and other combustion sources by fuel type and activity data.
EPA Stationary Combustion · Inventory Completeness Assessment
Decides whether a declared emission source belongs in a stationary combustion inventory, counts as a completeness gap, or falls under other guidance.
Publishers you can trust
Ship compliant decisions in an afternoon
Stop re-implementing regulation in every app. Subscribe to a suite, drop in the API key, and call it.
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Publish once, sell everywhere. Sertainly handles the runtime and metering.
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