Public APIs alternatives

Tools that do what Public APIs does, found by what they say they do rather than by shelf. Among the equally alike, the most used come first. Each line says how it differs from Public APIs.

Read 2026-10-22

With a free plan or free to use: Reqistry, Karada.ai, Bro Find AI, Cosmic, Cloudflare, Postman, Agent Nexus (agentnexus.app), UptimeRobot, Spala.

10 alternativesUnlike Public APIs

#1
Reflect AI Developer tools MCP · sign-in
Sells API design, API testing, UI test automation and test management tools, including Swagger, SoapUI, TestComplete and Zephyr.
Also: Agents, Code generationMore widely used
60.9k
Active
2003
#2
Reqistry Developer tools MCP · open
Searches, compares and monitors public APIs, scoring their uptime, docs, auth and CORS support for developers and coding agents.
Free planAlso: Search
115
Maintained
Free
#3
Karada.ai Developer tools
Compiles OpenAPI specs into Go MCP servers that AI assistants call, syncing tools on each API deploy.
Free planMore widely used
8
Active
From $19/mo
#4
Bro Find AI Developer tools MCP · open
Lists and ranks AI tools, agents and MCP servers, letting visitors browse, compare, upvote and launch listings.
Free planAlso: Search
39
Active
From $7.99 once
#5
Cosmic Developer tools
Headless CMS that stores structured content in custom models and serves it over REST and GraphQL APIs to websites and apps.
Free planMore widely used
11k
Active
From $99/mo
2016
#6
Cloudflare Security MCP · open
Proxies website traffic through a global network for CDN caching, DNS, DDoS protection and a web firewall, plus Workers serverless code and zero-trust access.
Free planAlso: Agents
4.9M
Active
From $20/mo
2009
#7
Postman Developer tools MCP · sign-in
Designs, tests, and manages APIs with integrated documentation, mocking, monitoring, and workflow automation.
Free planMore widely used
202k
Active
From $9/mo
2013
#8
Agent Nexus (agentnexus.app)Developer tools MCP · open
Catalogues APIs, MCP servers and CLIs for agents, health-checks them continuously, and serves them via a searchable registry API.
Free planAlso: Monitoring
1
Active
From $29/mo
#9
UptimeRobot Developer tools MCP · sign-in
Checks websites, APIs, ports and cron jobs on a schedule and sends alerts when they fail or slow down.
Free planAlso: Monitoring
283k
Active
From $12/mo
#10
Spala Developer tools MCP · open
Generates inspectable backends with databases, authentication, APIs, and validation for AI-built applications.
Free planMore widely used
28
Active
From $5/mo

← Public APIs: the full card All Developer tools tools →

How this list is made: the words Public APIs is described with (what it does, for whom, what it is used for) are matched against every tool in the Atlas. A tool on the same shelf, or doing the same kind of work, counts for a little more. Nothing here is paid for.