Marcel Czuryszkiewicz
Co-Founder
Marcel is one of the builders behind bundle.social, creating a social media API with a strong focus on developer experience, reliability, and real support. Before bundle.social, he worked at Samsung R&D, Reply AI, and Docplanner, building internal tools that helped companies grow. He brought that same practical, product-focused mindset to bundle.social, so you can trust that your project is in good hands.
Latest posts
How we made a product demo animation in three prompts
August 7, 2026 | Playbooks
A Fiverr animator stopped replying, so we built the mockup ourselves. One prompt turns Apple, Solana and Revolut ads into a style document with real numbers, one turns that document into a self-contained HTML spot, one slows it down. The exact prompts, and where the method stops.
Instagram API Rate Limits: Three Ceilings, Not One
August 7, 2026 | API Guides
Meta's docs give two publishing caps on the same page 100 posts in one section, 50 in another - and the widely quoted 25 appears nowhere in them. Here is what each of the three Instagram rate limits governs, which error code it throws, and which of them is worth retrying.
Social Media Posting API: What Runs Under the Hood, and When to Build Your Own
August 5, 2026 | API Guides
A social media posting API hides four different publishing models behind one endpoint. This article opens them up: container flows, chunked uploads, pull-from-URL, non-idempotent publishes that duplicate on retry - and a list of conditions under which you should build it yourself.
Migrating from Zernio to bundle.social: A Developer's Guide
August 5, 2026 | API Guides
Endpoint-by-endpoint mapping, the object-model translation, and an honest list of what bundle.social does not do. Tokens cannot transfer between vendors, so re-consent sets the timeline, not engineering. How to run it in shadow mode first and flip tenant by tenant without duplicates.
X (Twitter) API Pricing in 2026: What It Actually Costs
August 4, 2026 | Social Media
X replaced subscription tiers with pay-per-use, and there is no Enterprise tier in the pricing table any more. Covers the full rate card, the 2 million read cap, the 24-hour deduplication window most guides miss, and why a post containing a link costs 13.3 times a post without one.
Social Media API Integration: A Practical Guide for Developers & Marketers (No Fluff)
August 4, 2026 | Automation
Fifteen platforms side by side: token lifetimes, refresh models, publish flows, rate-limit models and publishing caps in one table. Then the parts that only show up in production - retry classification, the analytics mismatch, and media specs that fail a check you did not know existed.