List your API on PublicAPIs.io
Reach 37,000+ developers every month.
Standard listing is free. Growth Sponsor gets you more visibility and clicks.
Trusted by 1,000+ APIs already listed in the directory.
Choose how you want to list your API
Standard Listing
Free
✓ Included forever at no cost
✓ Appears in relevant category and search
✓ Clean, mobile-friendly API detail page
✓ Eligible for future "Top X" and category roundups
Perfect if you just want devs to discover and try your API.
RECOMMENDED
Growth Sponsor
$899/year
✨ Start with 14-day FREE trial • Cancel anytime
You'll authorize payment now, but won't be charged until after your 14-day trial. Cancel anytime if it's not working for you - no questions asked.
Limited early slots. Existing sponsors are grandfathered at this price.
Everything in Standard Listing, plus:
✓ Featured styling and higher placement in your category
✓ Rotation on the homepage "Featured APIs" section
✓ 2× shoutouts per year in the newsletter (1,100+ subscribers)
✓ Occasional social mentions when relevant
✓ Quarterly email with impressions & click stats
3 APIs have already upgraded to yearly sponsorship at this level in the last 2 months.
Submit your API
What happens next
For Standard: we'll review and usually approve within a few days.
Why APIs care about being listed here
Developer-first traffic.
People land here because they're searching for APIs, not memes.
Long-term discovery.
Once you're listed, you keep getting views as devs search categories.
Good company.
You sit alongside 1,000+ other public APIs in the catalog.
Zero lock-in.
Standard listing is free. You can upgrade to sponsor later if it's working for you.
FAQ
Q: Is my API guaranteed to be added?
A: If it's legit, documented, and not obvious spam or scam, yes. We still reserve the right to reject low-quality stuff.
Q: Can I upgrade to Growth Sponsor later?
A: Yes. Start free, watch your stats, and upgrade when you're ready.
Q: What kind of numbers do sponsors see?
A: It varies by category. We'll share impressions and clicks with you before renewal so you can decide.
Q: How does the 14-day free trial work?
A: You authorize payment when you submit, but won't be charged for 14 days. During that time, you'll see your listing go live with featured styling and promotion. If you're not seeing value, cancel anytime - no charge, no questions asked.
Q: Is $899/year going to increase?
A: This is early-pricing. As traffic and results grow, we'll raise it. Existing sponsors keep their rate.