Submit to APIs.io
APIs.io is a search engine and catalog of API providers built around the APIs.json format, with pages covering specs, plans, rate limits and agent-facing artifacts such as MCP servers. A listing gives your company a provider page that links to your site, docs and machine-readable definitions.
apis.io · Checked
APIs.io at a glance
- Pricing
- Free
- No price details on their site when we checked.
- Link type
- Dofollow
- Provider page https://apis.io/providers/openmercantil/ 'Visit website' link to https://openmercantil.es/ has rel="noopener" only (checked 2026-09-23)
- Review
- Manual review
- Link back required
- No
- Account required
- No
- Domain Rating
- DR46
- Domain Rating by Ahrefs, checked Sep 24, 2026. A score of the whole site’s backlinks, not a Google metric.
- Tranco rank
- #321,002
- Research top-sites ranking. Lower is more popular.
- Who browses it
- Developers, architects and AI-agent builders searching for APIs by capability
- Last checked
How to submit to APIs.io
Open the APIs.io submission page
This is the page makers use to add a product.
Have your assets ready
Name, tagline, description, logo and screenshots. The checklist below covers what to prepare so you can fill the form in one go.
Fill in the form carefully
Pick the most specific category the form offers and write the description for the people who browse APIs.io (Developers, architects and AI-agent builders searching for APIs by capability), not for search engines.
Wait for review
A person reviews submissions, so it can take a while. Once it’s live, check the link on your listing points to the right page.
Tips for APIs.io
- Every submission is read by a person and they list one real company per submission.
- If you already publish an APIs.json file, OpenAPI spec, llms.txt or MCP server, point to it in the form.
- Give a documentation URL and a working email; they reply there about the listing.
From APIs.io’s own guidelines and pages, in our words.
What to prepare
The basics every directory asks for, plus what matters most for developer tool directories.
- Product name and a one-line tagline (about 60 characters)
- A short description (1–2 sentences) and a longer one (a short paragraph)
- Square logo, at least 256×256 px, PNG or SVG
- 2–3 screenshots at a consistent size
- The exact page you want the link to point to
- Pricing model (free, freemium or paid) and a contact email
- Links to your docs and a quick-start or install command
- Your GitHub or GitLab repo, if public
- Supported languages, frameworks and platforms
- Pricing for the API or hosted tier, including free limits
Is APIs.io worth it?
Good for your SEO foundation
APIs.io reviews listings by hand and the listing link we inspected was followed. That combination is what makes a directory link worth having for a new site.
- Domain Rating by Ahrefs: 46 (moderate). That's the strength of links to the whole site, not a promise about what your listing passes on.
- Tranco rank #321,002: a mid-sized site, inside the top 500,000.
- A person reviews submissions, so expect a wait and a real quality bar.
- Free to list, so the only cost is your time.
This verdict is worked out from the facts above with fixed rules (link type, review, price, Domain Rating by Ahrefs, Tranco rank), not paid for. The directory has no say in it.
Questions about APIs.io
Is APIs.io free?
Yes. Listing on APIs.io is free. We checked on Sep 23, 2026.
Does APIs.io give a dofollow link?
Yes. The listing link we inspected was a followed (dofollow) link. Evidence: Provider page https://apis.io/providers/openmercantil/ 'Visit website' link to https://openmercantil.es/ has rel="noopener" only (checked 2026-09-23).
How do I submit to APIs.io?
Submit at https://apis.io/add/. A person reviews each submission before it goes live. Tip: Every submission is read by a person and they list one real company per submission.
Alternatives to APIs.io
All developer tool directoriesFree · Tranco #29
Free · Tranco #547
Free · DR 91 · Tranco #3,788
Free + paid options · DR 83 · Tranco #21,171
Free · DR 55 · Tranco #102,398
Free · DR 80 · Tranco #103,090
Also in these lists
APIs.io appears on these niche lists, next to other places to submit the same kind of product.
Sources
The pages we opened on Sep 23, 2026 to write this page.