Oleksandr

Building JSONex Lab — AI-powered HS code classification for importers/exporters. 35 MCP servers, Google Sheets add-on, REST API.

Romny, Ukraine Joined on Sep 20, 2026 https://jsonexlab.com

Work

Founder at JSONex Lab

Oleksandr

Oct 26

How Cloudflare D1's Daily Write Limit Almost Broke My Sanctions App (and How I Fixed It)

#cloudflarechallenge #d1 #serverless #database

3 min read

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Oleksandr

Oct 26

10-MCP-Server Ecosystem in 3 Weeks

#ai #webdev #cloudflarechallenge #buildinpublic

4 min read

Oleksandr

Oct 25

Debt Snowball vs Avalanche: Which Method is Actually Faster?

#productivity #fintech #notionchallenge #mon

2 min read

Oleksandr

Oct 22

The "works on my machine" problem is now "works in my context window"

#discuss #ai #testing #agents

1 min read

Oleksandr

Oct 22

How to connect a Currency API to your AI Agent (using MCP)

#ai #api #mcp #tutorial

1 min read

Oleksandr

Oct 22

How I Built 3 MCP Servers in a Weekend (and what I learned)

#ai #mcp #api #opensource

2 min read

Oleksandr

Oct 18

How we built a PEP Screening API with 19,408 records and x402 payments

#ai #webdev #api

1 min read

Oleksandr

Oct 16

We launched 7 B2B APIs on Product Hunt — here's the full stack

#showdev #producthunt #api #cloudflarechallenge

2 min read

Oleksandr

Oct 14

From 0 to 6 B2B API products in 6 days: Cloudflare Workers + MCP + x402

#showdev #ai #saas #mcp

3 min read

Oleksandr

Oct 10

I built 100 compliance screening pages with one command (OFAC, PEP, entity)

#showdev #webdev #api #cloudflarechallenge

5 min read

Oleksandr

Oct 8

I built a currency & VAT monitoring system with Cloudflare Workers

#showdev #webdev #api #cloudflarechallenge

4 min read

Oleksandr

Oct 8

I built 100 finance validators with one command

#showdev #webdev #javascript #api

3 min read

Oleksandr

Oct 8

I turned 100 document types into JSON with one command

#showdev #webdev #javascript #api

3 min read

Oleksandr

Oct 8

I generated 320 SEO pages with one command. Here's the full stack (and what broke).

#ai #webdev #seo #programming

5 min read

Oleksandr

Oct 5

I deployed 35 MCP servers in 10 days. Here's what nobody tells you about AI monetization

#ai #webdev #productivity #programming

5 min read

Oleksandr

Oct 2

I built a Creator Engine that extracts promises from sales conversations (80% accuracy)

#ai #webdev #productivity #programming

3 min read

Oleksandr

Oct 1

HS Codes Classifier — just launched on Product Hunt

#showdev #ai #api #producthunt

1 min read

Oleksandr

Sep 29

How I built 26 MCP servers + 2 REST APIs in 2 days with $0 infrastructure

#ai #api #crypto #webdev

3 min read

Oleksandr

Sep 20

Why We Need Client-Side Secret Scanning Before Commits Hit Main

#webdev #security #javascript #productivity

2 min read

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Oleksandr

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How Cloudflare D1's Daily Write Limit Almost Broke My Sanctions App (and How I Fixed It)

Want to connect with Oleksandr?

10-MCP-Server Ecosystem in 3 Weeks

Debt Snowball vs Avalanche: Which Method is Actually Faster?

The "works on my machine" problem is now "works in my context window"

How to connect a Currency API to your AI Agent (using MCP)

How I Built 3 MCP Servers in a Weekend (and what I learned)

How we built a PEP Screening API with 19,408 records and x402 payments

We launched 7 B2B APIs on Product Hunt — here's the full stack

From 0 to 6 B2B API products in 6 days: Cloudflare Workers + MCP + x402

I built 100 compliance screening pages with one command (OFAC, PEP, entity)

I built a currency & VAT monitoring system with Cloudflare Workers

I built 100 finance validators with one command

I turned 100 document types into JSON with one command

I generated 320 SEO pages with one command. Here's the full stack (and what broke).

I deployed 35 MCP servers in 10 days. Here's what nobody tells you about AI monetization

I built a Creator Engine that extracts promises from sales conversations (80% accuracy)

HS Codes Classifier — just launched on Product Hunt

How I built 26 MCP servers + 2 REST APIs in 2 days with $0 infrastructure

Why We Need Client-Side Secret Scanning Before Commits Hit Main