The request is for calculating interest and fines (Brazilian Portuguese: juros e multa), a computation. AgentTax calculates sales tax, not interest or late fees, so it is a weak match and is omitted. Stripe's tax calculation endpoints compute tax, not interest or fines, so it is also omitted. A platform or jurisdiction question may matt
A question back: Which country or jurisdiction do the interest and fine rules apply to (for example Brazil), since the calculation formulas depend on local law?
- 1
Stupidly Cleverstupidlyclever.comwebsite read, tools not yet checked
Use 150+ verified calculators in your browser, call them from any application via REST API, or give your AI agent accurate tools via MCP. No sign-up required. S 6
official:MCP server · Stupidly Clever
- 2
Numeratica APInumeratica.comwebsite read, tools not yet checked
A financial-planning calculation API with 76 deterministic calculators, including mortgages and debt, reachable via an MCP server 7.
official:MCP server · Numeratica — financial planning calculations
Sources
- 6Stupidly Clever — Calculations & Reference Data for Apps, Agents & Peoplestupidlyclever.com · read 2026-10-29
- 7Quickstart Numeratica APIdocs.numeratica.com · read 2026-10-29
For agents: the 10 actions behind this answer
PostTaxCalculations · Stripe API verified and signed
Create a Calculation
custom_api_call · GitHub (Activepieces) verified and signed
Custom API Call — Make a custom API call to a specific endpoint
billing.propose_late_fee_waiver · Synapsor Runner found in code, not yet checked
Create a review-required proposal to waive one invoice late fee; source DB remains unchanged.
BillingPayments_PostPayment · DocuSign REST API verified and signed
Posts a payment to a past due invoice.
· ReefAPI website read, tools not yet checked
One key for 585+ data APIs — reviews, jobs, real-estate, commerce, travel & finance. One credit pool, a real playground, clean docs, AI-ready.
· Stupidly Clever website read, tools not yet checked
Use 150+ verified calculators in your browser, call them from any application via REST API, or give your AI agent accurate tools via MCP. No sign-up required.
· Numeratica website read, tools not yet checked
Go from zero to a reproducible retirement projection with the Numeratica financial-planning API in under five minutes.
track_payment · AgentTax MCP Server found in code, not yet checked
Track a payment you received and calculate your sales tax liability. Call this after receiving any payment — Stripe, x402, or direct.
· Payments AI website read, tools not yet checked
Monetize AI from day one with one agentic billing layer: merchant-of-record payments for AI apps and gateway orchestration for platforms and marketplaces.
· Ohmyfin website read, tools not yet checked
Track a cross-border payment by UETR or reference number, see the correspondent banks on its route, and ask Ohm about a delay. Built on real SWIFT data.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.