I Listed My API on 10 Free Directories — Here's What Happened
The Problem
I built a crypto trading signals API but nobody knew it existed. 0 sales, 0 views on Gumroad. The problem wasn't the product — it was distribution.
The Solution: Free API Directories
I found 10 directories where you can list your API for free:
| Directory | Reach | Time | Cost |
|---|---|---|---|
| Public APIs (GitHub) | 300K+ stars | 10 min | Free |
| api.market | 500+ APIs | 15 min | Free (keep 80%) |
| RapidAPI | 8M+ devs | 30 min | Free |
| APIs.guru | 2,337 APIs | 5 min | Free |
| PublicAPIs.io | 37K devs/mo | 5 min | Free |
| APIList.fun | 800+ APIs | 5 min | Free |
| X402 | Crypto devs | 5 min | Free |
| FiatDock | MCP marketplace | 10 min | 0% first 30d |
| AI Agent Store | Growing | 10 min | Free |
| dev.to | 1M+ devs | 5 min | Free |
My API: Nexus Intelligence
Free crypto trading signals + OSINT intelligence API
# Try it right now — no signup
curl http://169.58.38.67:8790/api/signals/latest
curl http://169.58.38.67:8790/api/entities
curl http://169.58.38.67:8790/api/events
Results After 30 Generations of Evolution
| Coin | Win Rate | Sharpe |
|---|---|---|
| ADA | 89.3% | 3.13 |
| SOL | 87.6% | 5.27 |
Pricing
- Free: 10 queries/day
- Pro ($49/mo): Subscribe on Gumroad
- Report ($5): Buy on Gumroad
Key Insight
Building the API was 20% of the work. Distribution is 80%.
If you're a developer with an API nobody uses, stop coding and start listing. The directories above are free and take less than 2 hours total.
API live at http://169.58.38.67:8790 — try it free
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