Agent Nexus
MCP Servers
Find agent-callable APIs, MCP servers and CLIs by capability, with live health and uptime data
No keyCORSHTTPS
Free MCP Servers APIs
Free public APIs for mcp servers, each one verified and kept up to date.
14 listed · 8 need no key · 1 work in the browser
Filesystem
MCP Servers
Read/write local files
No key
corpusAI Cloud Pricing
MCP Servers
Cloud, GPU and LLM token prices for agents, free discovery tools and paid per-call data
No key
Edgepedia
MCP Servers
Search and read Edgepedia, a free and growing encyclopedia with citations
No key
OpenSwissData
MCP Servers
Swiss customs tariff (TARES), FINMA register and warnings, NOGA/NACE/ISIC code crosswalks
No key
RegSentry
MCP Servers
Inspect authorized static tracking signals and review supplied consent evidence
No key
Silicon Floor
MCP Servers
Who owns AI and chip stocks, what insiders sell, how fast they grow: answers from SEC filings
No key
Vuntum
MCP Servers
Sourced, dated data on consumer robots and physical AI: specs, prices, evidence
No key
GitHub
MCP Servers
Repos, issues, PRs, code search
OAuth
IPstack MCP
MCP Servers
IP geolocation, threat and timezone lookups for agents
API key
Catastro GPS
MCP Servers
Cadastral parcels in 29 European countries by reference, point or address
API key
Kuro
MCP Servers
Create AI images, video clips, voice-overs, music and editable storyboard films
OAuth
Monocrawl
MCP Servers
Public posts, profiles, comments and products from 70+ social, shopping and search platforms
API key
Twinbay
MCP Servers
Spin up stateful API twins, read request logs and grade agent runs
OAuth
All 14 MCP Servers APIs
Free MCP Servers APIs — common questions
Counts and timings below come from our own scheduled checks of this category.
How many free mcp servers APIs are there?
We track 14 in this category, of which 4 responded at our last check. 8 of them need no API key.
Which mcp servers APIs work without an API key?
8 of the 14 entries here need no credential. Filter this page by "no key" to see them, or browse the no-key collection for every keyless API across all categories.
Can I use these mcp servers APIs in a browser app?
1 entries in this category need no key and return CORS headers, which is the combination that lets you call them straight from client-side JavaScript. The rest need a server or a proxy in between.
Which is the fastest free mcp servers API?
Of the keyless options that responded at our last check, Filesystem was quickest at a median 906 ms. Speed is only one factor — coverage and licensing usually matter more — but it is measured here rather than claimed.
How do you know these APIs still work?
We call every listing on a schedule and record the status code, response time and whether CORS headers came back. Those results drive the badges on this page. Across the whole catalogue, 361 of 3,005 entries were not responding at the last full run, which is the sort of thing an unchecked list never tells you.