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BioArc: The System

Based on your requirement to target Instagram, Facebook, X (Twitter), and LinkedIn using a free tier, here is how the options break down and which one is the most viable path. First, the direct API approach using **X API v2** on a free tier is no longer feasible for this use case. As of recent changes, X has discontinued its free tier for developers, moving to a pay-per-use model that starts at $0.015 per plain post (and jumps to $0.20 per post if it contains a link). This eliminates the "Direct API" route if keeping costs at absolute zero is the main goal. Therefore, using a Unified API or automation platform is your best route for a free solution. Here is how the two main options compare: ### 1. Make.com (The Best Free Automation Choice) Make.com is a visual workflow builder that connects to social media platforms without you having to write the API integrations yourself. * **Free Plan Limits:** 1,000 "credits" (operations) per month and up to 2 active scenarios. * **Platform Support:** Fully supports Facebook, Instagram, LinkedIn, and X. * **How it works for you:** You can create one scenario (workflow) in Make.com. Your Next.js backend sends a single webhook to Make.com when you publish a post. Make.com then takes that data and uses 4 operations to post it to Instagram, Facebook, X, and LinkedIn. * **Capacity:** At 4-5 operations per blog post (1 webhook trigger + 4 social posts), the 1,000 monthly operations limit means you could theoretically publish around 200 blog posts per month for completely free. ### 2. Ayrshare (The Unified Developer API) Ayrshare is an API specifically built to handle multi-platform social media posting. * **Free Plan Status:** Ayrshare does not have a permanent free tier; they only offer a 14-day or 28-day free trial. * **Alternative:** An alternative API called **Upload-Post** offers a permanent free tier of 10 uploads per month (supporting 2 social profiles) without requiring a credit card. However, 10 uploads a month is quite restrictive for a growing business. ### The Recommended Path For a completely free setup that hits all four of your target platforms (Instagram, Facebook, X, and LinkedIn), **Make.com is the superior choice.** It allows you to bypass the new paid constraints of the X API, handles the complex authentication for Meta (Facebook/Instagram) and LinkedIn, and gives you a generous 1,000 operations per month for free.