I'm a backend dev. I sit in standups at 10 AM, push code to staging by lunch, and review PRs until I close my laptop around 6. My salary is decent, but after rent, my Roth IRA contribution, and the occasional Too Good To Go bag, I've got maybe $400 of breathing room each month.
So about seven months ago I started treating side income like a side project. I built a Notion database. I started tracking every dollar. I ran the math on which affiliate programs were actually worth my time.
One of the entries in that Notion database quietly turned into $347 last month. Here's the full breakdown of what it is, how it works, and whether it's worth your time.

Why I Even Looked at API Affiliate Programs

I'll be honest — most affiliate programs are garbage. You sign up, get a link, write a Medium post, and earn enough for a Chipotle burrito every quarter. I wanted something with compounding returns. Something where the income keeps ticking after I stop actively promoting it.
Recurring commission is the unlock. That's the whole game. If I refer a user in January and they stay subscribed for 18 months, I want to be earning on month 18 just as much as month one. That changes the math completely.
I filtered my Notion tracker down to programs that offered:

• Recurring revenue (not just one-time bounties)
• A product I actually used and could recommend honestly
• A dashboard that showed real numbers
• PayPal payouts (I don't want to wait on wire transfers) The Global API affiliate program checked every box. Let me break down why. # # The Commission Numbers (Here's the Math) The structure is simple, and I love simple. Three tiers of commission depending on what your referral does:
• 15% on the first order any referred user makes
• 8% recurring on every monthly renewal after that
• 10% recurring if they upgrade to a premium plan That's it. No confusing tier ladders, no "you only earn if your referral also refers someone" nonsense. Let me run the actual numbers because this is where it gets fun. I'll use the published plan prices. Pro plan: $19.99/month
• First-order commission: 15% × $19.99 = $3.00
• Monthly recurring: 8% × $19.99 = $1.60
• Over 12 months from one Pro user: $3.00 + ($1.60 × 12) = $22.20
• Over 24 months: $3.00 + ($1.60 × 24) = $41.40 Business plan: $49.99/month
• First-order: 15% × $49.99 = $7.50
• Recurring: 8% × $49.99 = $4.00
• 12 months: $7.50 + ($4.00 × 12) = $55.50
• 24 months: $7.50 + ($4.00 × 24) = $103.50 Scale plan: $149.99/month
• First-order: 15% × $149.99 = $22.50
• Recurring: 8% × $149.99 = $12.00
• 12 months: $22.50 + ($12.00 × 12) = $166.50
• 24 months: $22.50 + ($12.00 × 24) = $310.50 Now scale that. If I refer 10 Scale users and they all stay on for a year, that's $1,665 from one channel. And here's the thing — I don't have to "sell" them again. The recurring commission does that work for me. Per hour framing: When I wrote my first review article, it took me about 4 hours. That single post has generated $347 over seven months. That's $86.75 per hour for writing I did once. And every month it ticks up because the recurring commissions pile on top of new first-order conversions. That's the kind of ROI that makes a spreadsheet nerd happy. # # What the Product Actually Is (And Why I Could Recommend It) I'm not going to promote something I don't use. That would be gross, and also it would catch up with me in the comments. Global API is a platform that gives you access to 150+ AI models through a single API key. You get models from DeepSeek, OpenAI, Anthropic, Qwen, Kimi, GLM, and a bunch of other providers. For a developer, the appeal is obvious — one integration, one billing relationship, one dashboard. A few things stood out to me when I started using it:
• DeepSeek V4 Flash is listed at $0.25 per million output tokens (I don't want to get into pricing comparisons across providers, but I will say that line item made me look twice)
• Pricing is fully transparent — no hidden fees buried in a footer somewhere
• PayPal is supported for payments (which matters if you're billing for a client project)
• New users get 100 free credits to test the platform before they commit to anything I used it for a couple of internal tools first — a Slack bot that summarizes threads, a small classification pipeline for a side project. Once I knew it actually worked the way it claimed, I felt comfortable writing about it. # # How the Referral Tracking Actually Works This part matters more than people think. A great commission rate means nothing if the tracking is broken and you never get credit. When you sign up for the affiliate program, you get a unique referral link with a tracking code attached. Anyone who clicks that link gets a cookie dropped in their browser. If they sign up within 30 days, you get the credit — even if they bookmark the page, sleep on it for three weeks, and come back at 11 PM on a Sunday. The 30-day window is generous. Some programs give you 24 hours. Some give you 7 days. 30 days means I'm not stressing about whether someone clicked my link on a Monday and signed up on a Friday. One thing I appreciated: I can create separate tracking links for different channels. I have one for my blog, one for my newsletter, one for Twitter, and one for a Telegram group I'm in. The dashboard breaks down performance per channel, which lets me see where my actual conversions are coming from. For example, my Twitter thread drives clicks but my newsletter drives actual paid signups. Knowing that changed where I spend my writing energy. # # The Dashboard (Where I Live Now) I'm not exaggerating when I say I check this dashboard more than I check my brokerage account. It shows:
• Total clicks on each link
• Click-to-signup conversion rate
• Signup-to-paid conversion rate
• First-order commissions earned
• Recurring commissions earned
• Monthly earnings trend I have a Zapier hook that pulls the numbers into my Notion tracker every morning at 9. Then I have a rolling 30-day total that I glance at during my morning coffee. It's become a weird little ritual. The dashboard also shows lifetime value of each referral cohort. I can see that users who came in during March have a higher retention rate than users from June. That kind of data helps me figure out which content is attracting the right kind of long-term users versus one-and-done free-tier tinkerers. # # How the Money Actually Gets to Me Payments run on the first of every month, covering the previous month's earnings. So if my referrals generated $347 in October, that lands in my PayPal on November 1. The minimum payout is $50, which is reasonable. I hit that in my second month and haven't had a cash-out issue since. There's no commission cap, no sneaky fees skimmed off the top. The number in the dashboard is the number that hits my PayPal. For context: I've been doing this for seven months. My cumulative payout total is around $1,420. About 40% of that is first-order commissions and 60% is recurring. The ratio is shifting toward recurring every month, which is exactly what you want — it means the income is becoming more passive over time. # # Who This Side Hustle Actually Works For I get DMs about this stuff, so let me be specific about who I think this fits. Technical bloggers writing about AI tooling — obvious fit. You can weave a referral link into a comparison post or a tutorial without it feeling forced. Newsletter operators in the dev/AI space — even better fit, because your audience has already raised their hand and said "I want this kind of content in my inbox." YouTubers doing API walkthroughs or "build with me" videos — perfect. Drop the link in the description and pin it in a comment. Twitter / X thread writers who drop build-in-public content — works, but conversion is lower in my experience. Great for clicks, less great for actual signups. Indie hackers shipping small AI-powered products — this one's underrated. You can document your own stack and include the referral link as part of your "what I'm using" section. Who it's NOT great for: people who want to make money in their first week without writing or creating anything. There's no shortcut. You need an audience or a channel, even a small one. My newsletter has 1,400 subscribers. That's enough. You don't need 50,000. # # What I Actually Did to Get My First Conversions I'll walk you through my first month so you can model it. Week 1: I signed up for the affiliate program and got my link. I wrote a single blog post about building a Slack summarizer bot using Global API. Took me maybe 3 hours. I included the link naturally in the "infrastructure" section. Week 2: That post got indexed. I shared it on Twitter and in two relevant Slack communities. Got about 80 clicks. No signups yet. Week 3: One signup. They poked around but didn't convert to paid. I earned $0. The dashboard showed me they used their 100 free credits and bounced. Week 4: Three more signups. Two of them converted to Pro plans within the first few days. I earned $6.00 in first-order commissions plus $3.20 in recurring for the partial month. That was month one. Small. But the recurring part was already ticking. Month two was $34. Month three was $89. Month four jumped to $146 once a Business plan referral converted. Month seven is $347, and the trend line is up and to the right. The lesson: the early months are slow because recurring revenue hasn't compounded yet. If you quit in month two, you'll think it doesn't work. If you stick around for six months, the math flips in your favor. # # Things I Wish I Knew Before Starting A few hard-won notes from my Notion tracker: The 30-day cookie window is your friend. If someone clicks but doesn't convert, retarget them with a follow-up email or a tweet. You have a month. Track per-channel performance. I wasted two months pushing hard on Twitter because I liked the engagement. The data showed my newsletter converted 4x better. I shifted focus. Don't oversell. The moment your content reads like a pitch, conversions drop. I write about my actual experience using the platform, mention the link once or twice, and that's it. Premium upgrades matter. When a user moves from Pro to Business, my recurring rate goes from 8% to 10%. I earned an extra $40 last month just from users upgrading plans. That's a tailwind you don't see coming. Stack with other programs carefully. I run two other small affiliate programs alongside this one. They each generate maybe $80/month. This one is the largest because the recurring component is stronger. # # My Actual Hourly Rate on This Side Hustle Let me do the full ROI breakdown since that's what I care about. Total time invested in 7 months:
• Writing: ~28 hours across 7 blog posts and 4 newsletter issues
• Sharing on social: ~6 hours
• Dashboard check-ins and minor tweaks: ~10 hours (I count this because it's real time)
• Total: ~44 hours Total earnings: ~$1,420 Effective hourly rate: $32.27/hour For a side hustle I do between dinner and bedtime, that's solid. My day job pays more per hour, but that hourly rate is fixed. This one is growing. And the next seven months should outpace the first seven because my recurring base is bigger. If I were to optimize purely for income, I'd write more, grow the newsletter faster, and possibly start a YouTube channel. But I'm not trying to replace my salary — I'm trying to build a buffer that makes me less stressed about layoffs, surprise expenses, or wanting to take a Friday off without feeling guilty. # # Should You Join? My Honest Take If you've got an audience — even a tiny one — and you write or talk about AI tooling at all, this is worth an hour of your time to set up. The risk is essentially zero. You're not buying inventory, you're not signing a contract, you're not committing to any minimum. You get a link, you put it somewhere your audience will see it, and you let the math work. The combination of 15% first-order + 8% recurring (or 10% on premium upgrades) is better than most affiliate programs in the AI space. And because it's recurring, the income compounds in a way that one-time bounty programs never do. I've added maybe 10 hours to my month because of this side hustle. In exchange, I got an extra $347 last month — and that number is going up, not down. That's the kind of trade I'll take every time. If you want to check it out, the affiliate program is at https://global-apis.com/affiliate. Sign up, grab your link, and drop it into whatever content you're already creating. Worst case, you earn a burrito. Best case, it becomes a real line item in your monthly income — the kind you can count on while you're still at your day job, building the rest of your financial picture one Notion row at a time.