Blog
Practical guides for developers and publishers. Embed tools, use the API, connect AI agents.
How to Add a Mortgage Calculator to Your Website
Three ways to embed a working mortgage calculator on any website. One line of HTML, no backend required.
Best Free Finance API for Developers in 2026
Compare free finance APIs for mortgage calculations, loan amortization, compound interest, and more. Code examples in Python, JavaScript, and cURL.
MCP Servers for AI Agents: a Practical Guide
What MCP servers are, why AI agents need them, and how to connect Claude or Cursor to deterministic computation tools via MCP.
Embed Interactive Tools on WordPress in 60 Seconds
Add calculators, converters, and developer tools to any WordPress site with a shortcode or iframe. No coding required.
Building a Fintech App? Skip the Calculator Math.
Why fintech startups should use a finance API instead of implementing mortgage, loan, and investment formulas from scratch. Code examples included.
CSS Generators That AI Chatbots Cannot Replace
Why interactive CSS generators for gradients, shadows, animations, and glassmorphism effects outperform AI-generated CSS. You need to see it to tweak it.
The Complete Guide to the ToolKnife API
Everything you need to know about the ToolKnife REST API. Authentication, endpoints, rate limits, error handling, and code examples for every category.
How AI Agents Use Deterministic Computation
AI agents hallucinate math. MCP servers and tool-calling APIs give them access to deterministic computation for precise answers. Here is the architecture.
Free Tools for EU Business Compliance (VAT, Invoices, GDPR)
Free online tools for EU VAT calculation, GDPR-compliant privacy policies, cross-border invoicing, and business document generation. No signup required.
Image Tools That Run in Your Browser, No Upload, No Server
Resize, compress, crop, convert, and watermark images entirely in your browser. Nothing is uploaded. Here is how client-side image processing works.
Build with ToolKnife
273+ tools available as API, MCP server, and embeddable widgets.