Free Development APIs with no API key

105 Development APIs that need no API key, account or credit card. 67 of them also allow CORS, so you can call them straight from browser JavaScript. Listed by uptime and ease of use.

1
Icanhazip API
Online · 278 ms
The family of icanhaz sites help you get more information about your network connection.
- No API key needed
- Fast: 278 ms response
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
2
Index Agentica API
Online · 382 ms
Agent-first directory of skills, MCP servers, tools, protocols and APIs as JSON, markdown, llms.txt.
- No API key needed
- Fast: 382 ms response
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
3
Open VSX API
Online · 270 ms
Search and access VS Code extensions from the Open VSX registry.
- No API key needed
- Fast: 270 ms response
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
4
RubyGems API
Online · 360 ms
Ruby gem metadata, versions, dependencies and search.
- No API key needed
- Fast: 360 ms response
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
5
Statically API
Online · 324 ms
A free CDN for developers.
- No API key needed
- Fast: 324 ms response
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
6
TidyTools API
Online · 157 ms
Web page to clean Markdown and AI crawler robots.txt checks, free without a key (rate limited).
- No API key needed
- Fast: 157 ms response
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
7
24 Pull Requests API
Online · 852 ms
Project to promote open source collaboration during December.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
8
ApicAgent API
Online · 1108 ms
Extract device details from user-agent string.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
9
APIzone API
Online · 513 ms
Independent uptime & status monitoring for 200+ popular APIs.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
10
Cloudflare Trace API
Online · 785 ms
Get IP Address, Timestamp, User Agent, Country Code, IATA, HTTP Version, TLS/SSL Version & More.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
11
CORS Proxy API
Online · 1056 ms
Get around the dreaded CORS error by using this proxy as a middle man.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
12
crates.io API
Online · 963 ms
Rust crate versions, downloads and dependency metadata.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
13
DigMyName API
Online · 656 ms
Domain availability and registrar pricing across 52 TLDs.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
14
EndOfLife.date API
Online · 783 ms
Software end-of-life dates and support lifecycles.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
15
Fair Draw API
Online · 576 ms
Verifiable random draws bound to the drand public randomness beacon.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
16
GeraCode API
Online · 550 ms
Barcode (EAN-13, UPC-A, Code 128, ITF-14) and QR code images, PNG or SVG. Docs in Portuguese.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
17
GithubTrends API
Online · 677 ms
GitHub Trending repositories with star history and open-source alternatives to paid tools.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
18
Httpbin API
Online · 924 ms
A Simple HTTP Request & Response Service.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
19
Image-Charts API
Online · 997 ms
Generate charts, QR codes and graph images.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
20
Is This Site Down? API
Online · 1102 ms
Check if any website is down, from two continents; live status, uptime history and TLS expiry.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
21
jsDelivr API
Online · 676 ms
Package info and download stats on jsDelivr CDN.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
22
Kroki API
Online · 591 ms
Creates diagrams from textual descriptions.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
23
LiveOrDown API
Online · 526 ms
Live up/down status of 240+ online services, checked every minute from 3 regions.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
24
macadress API
Online · 463 ms
MAC address and OUI vendor lookup synced from IEEE, with randomized-MAC detection.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
25
MyIPRightNow API
Online · 445 ms
Public IP address with network, location, and connection details.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
26
NetworkCalc API
Online · 808 ms
Network calculators, including subnets, DNS, binary, and security tools.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
27
NuGet API
Online · 468 ms
.NET package versions, metadata and search.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
28
OutageDeck API
Online · 611 ms
Live status and incidents for 170+ cloud and SaaS providers from official feeds.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
29
ProxyForge API
Online · 543 ms
Free auto-updating list of live-tested proxies (HTTP/HTTPS/SOCKS4/SOCKS5), refreshed every 6 h.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
30
QR code API
Online · 776 ms
Create an easy to read QR code and URL shortener.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
31
QR Code Crafter API
Online · 1036 ms
Generate static QR codes in SVG, PNG, JPG, WebP, PDF, or EPS.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
32
QuickChart API
Online · 718 ms
Generate chart and graph images.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
33
Quotable API
Online · 528 ms
Random quotes with authors and tags.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
34
Sonar API
Online · 670 ms
Project Sonar DNS Enumeration API.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
35
Thunder Client API
Online · 636 ms
Thunder Client is a hand-crafted lightweight Rest API Client extension for Visual Studio Code.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
36
Timezone WorldTime API
Online · 791 ms
Current time, UTC offset and DST for any time zone or IP, a drop-in WorldTimeAPI replacement.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
37
TinyMind Agent Tools API
Online · 611 ms
Free APIs by an AI agent on a VPS: actor lookup, word-of-the-day, poems, jokes, ping.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
38
Vornamencheck API
Online · 440 ms
Gender probability for a first name, optionally per country; documentation in German.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
39
Beeceptor API
Online · 427 ms
Build a mock Rest API endpoint in seconds.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
40B
BountyCheck API
Online · 607 ms
Claimability verdicts for GitHub bounty issues; free stats and sample, checks paid per call via x402.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
41
dotsweep API
Online · 593 ms
Domain availability across 1200+ TLDs with registration and renewal prices.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
42
ExtendsClass JSON Storage API
Online · 488 ms
A simple JSON store API.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
43
IPify API
Online · 349 ms
A simple IP Address API.
- No API key needed
- Fast: 349 ms response
- HTTPS
No authHTTPSCORS ?
44
JSONPlaceholder API
Online · 539 ms
Fake REST API for testing and prototyping.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
45
Nationalize.io API
Online · 1133 ms
Estimate the nationality of a first name.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
46
Orca Scan API
Online · 519 ms
Generate barcode images (QR, Code 128, EAN, Data Matrix and more) in SVG, PNG, JPG or PDF.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
47
Qrcode Monkey API
Online · 86 ms
Integrate custom and unique looking QR codes into your system or workflow.
- No API key needed
- Fast: 86 ms response
- HTTPS
No authHTTPSCORS ?
48
TheQRCode API
Online · 835 ms
Generate QR codes for URLs, WiFi, contact cards, email and text, with custom colors and styling.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
49A
AgentPay Domain Lookup API
Online · 607 ms
DNS records, WHOIS/RDAP, IP ownership and domain reports for AI agents, paid per call via x402.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
50
CDNJS API
Online · 614 ms
Library info on CDNJS. A free development API by cdnjs.com.
- No API key needed
- Returns JSON at its URL
- HTTPS
No authHTTPSCORS ?
51C
ChartBytes API
Online · 776 ms
Chart image API: turn a URL into a PNG or SVG chart (bar, line, area, scatter, pie, donut, stacked).
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
52
claudecookie API
Online · 1859 ms
Convert cookie formats, check Claude sessions and generate Claude Code credentials.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
53
Codeberg API
Online · 548 ms
Git hosting, repos and issues via Gitea API.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
54
DownStatus API
Online · 548 ms
Real-time status for GitHub, AWS, Discord and 90+ services.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
55
HostDealRadar API
Online · 532 ms
Source-backed hosting price and provider record lookup.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
56
Icanhazepoch API
Online · 1619 ms
Get Epoch time. A free development API by https://major.io/p/extra-icanhaz-services-going-offline/.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
57
msgboard API
Online · 504 ms
Public message board for agent-to-agent messaging, no account or key.
- No API key needed
- Returns JSON at its URL
- HTTPS
No authHTTPSNo CORS
58
Nerdulator API
Online · 565 ms
Everything derivable from one value: numbers, dates, colours, UUIDs, cron expressions.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
59X
XLSX Inspector API
Online · 1195 ms
Inspect XLSX/XLSM structure: sheets, formulas, macros and external links.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
60
Agent Nexus API
Online · 8197 ms
Continuously probed registry of APIs, MCP servers and CLIs callable by agents.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
61
Agify.io API
Online · 1218 ms
Estimates the age from a first name.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
62
Codex API
Online · 911 ms
Online Compiler for Various Languages.
- No API key needed
- HTTPS
No authHTTPSCORS ?
63D
DomainDb Info API
Online · 806 ms
Domain name search to find all domains containing particular words/phrases/etc.
- No API key needed
- Returns JSON at its URL
- HTTPS
No authHTTPSCORS ?
64
Genderize.io API
Online · 1214 ms
Estimates a gender from a first name.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
65
Hex API
Online · 598 ms
Elixir and Erlang package versions and docs.
- No API key needed
- HTTPS
No authHTTPSCORS ?
66
Homebrew Formulae API
Online · 255 ms
Package and cask data for the Homebrew package manager.
- No API key needed
- Fast: 255 ms response
- HTTPS
No authHTTPSCORS ?
67
IFTTT API
Online · 764 ms
Learn how to build an API to show and update connections, run actions, perform queries, and listen for triggers.
- No API key needed
- HTTPS
No authHTTPSCORS ?
68
IPinfo API
Online · 586 ms
Another simple IP Address API.
- No API key needed
- HTTPS
No authHTTPSCORS ?
69
JSON 2 JSONP API
Online · 711 ms
Convert JSON to JSONP (on-the-fly) for easy cross-domain data requests using client-side JavaScript.
- No API key needed
- HTTPS
No authHTTPSCORS ?
70
MY IP API
Online · 711 ms
Get IP address information. A free development API by MyIP.com.
- No API key needed
- HTTPS
No authHTTPSCORS ?
71
npm Registry API
Online · 975 ms
Query information about your favorite Node.js libraries programatically.
- No API key needed
- HTTPS
No authHTTPSCORS ?
72
oyyi API
Online · 2732 ms
API for Fake Data, image/video conversion, optimization, pdf optimization and thumbnail generation.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
73
W3C Validator API
Online · 283 ms
Validate HTML and check markup errors.
- No API key needed
- Fast: 283 ms response
- HTTPS
No authHTTPSCORS ?
74
API Tool Calls API
Online · 815 ms
API Tool Calls: Home cost planners, page to Markdown, SEO checks and recalls.
- No API key needed
- HTTPS
No authHTTPSNo CORS
75
Aquanode API
Online · 609 ms
Live GPU rental prices and availability across nine cloud providers.
- No API key needed
- HTTPS
No authHTTPSNo CORS
76
Ciprand API
Online · 542 ms
Secure random string generator. A free development API by polarspetroll.
- No API key needed
- HTTPS
No authHTTPSNo CORS
77D
Domain Info by LifeStep API
Online · 1416 ms
DNS records, SPF/DMARC detection and TLS certificate expiry.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
78
License-API
Online · 591 ms
Unofficial REST API for choosealicense.com.
- No API key needed
- HTTPS
No authHTTPSNo CORS
79
Litport Free Proxy API
Online · 723 ms
Live-tested HTTP, SOCKS4, and SOCKS5 proxies with latency, uptime, and geolocation.
- No API key needed
- HTTPS
No authHTTPSNo CORS
80
Packagist API
Online · 619 ms
PHP Composer package versions and dist metadata.
- No API key needed
- HTTPS
No authHTTPSNo CORS
81
QR code API
Online · 789 ms
Generate and decode / read QR code graphics.
- No API key needed
- HTTPS
No authHTTPSCORS ?
82Q
QR Code by LifeStep API
Online · 1256 ms
Generate QR codes as PNG or SVG with size, border and color options.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
83
ReplyNodes API
Online · 601 ms
Convert a public web page into clean Markdown.
- No API key needed
- HTTPS
No authHTTPSNo CORS
84
API Grátis API
Online · 507 ms
Multiples services and public APIs.
- No API key needed
- HTTPS
No authHTTPSCORS ?
85B
Bored API
Online · 638 ms
Find random activities to fight boredom.
- No API key needed
- HTTPS
No authHTTPSCORS ?
86
Changelogs.md API
Online · 2351 ms
Structured changelog metadata from open source projects.
- No API key needed
- HTTPS
No authHTTPSCORS ?
87
DigitalOcean Status API
Online · 1227 ms
Status of all DigitalOcean services.
- No API key needed
- HTTPS
No authHTTPSCORS ?
88H
Hipsum API
Online · 876 ms
Hipster-themed lorem ipsum generator for placeholder text.
- No API key needed
- HTTPS
No authHTTPSCORS ?
89
isitdownstatus API
Online · 552 ms
Check if websites and online services are currently down.
- No API key needed
- HTTPS
No authHTTPSCORS ?
90K
Keyvalue API
Online · 674 ms
Simple key-value storage REST API for quick prototyping.
- No API key needed
- HTTPS
No authHTTPSCORS ?
91
APIs.guru API
Online · 3581 ms
Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs.
- No API key needed
- HTTPS
No authHTTPSCORS ?
92
Go Module Proxy API
Online · 1224 ms
Go module versions and source metadata.
- No API key needed
- HTTPS
No authHTTPSCORS ?
93
Serialif Color API
Online · 708 ms
Color conversion, complementary, grayscale and contrasted text.
- No API key needed
- HTTPS
No authHTTPSNo CORS
94H
host-t.com API
Online · 1906 ms
Basic DNS query via HTTP GET request.
- No API key needed
- HTTPS
No authHTTPSNo CORS
95
SHOUTCLOUD API
Online · 802 ms
ALL-CAPS AS A SERVICE. A free development API by shoutcloud.io.
- No API key needed
No authNo HTTPSCORS ?
96C
CountAPI
Last check failed
Free and simple counting service. You can use it to track page hits and specific events.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
97I
ip-fast.com API
Last check failed
IP address, country and city.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
98L
Lua Decompiler API
Last check failed
Online Lua 5.1 Decompiler. A free development API by lua-decompiler.ferib.dev.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
99M
Mocky API
Last check failed
Mock user defined test JSON for REST API endpoints.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
100Q
QR & Barcode API
Last check failed
QR codes and barcodes (Code 128, EAN-13, Data Matrix, PDF417 + more). SVG or PNG output.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
101R
RSS feed to JSON API
Last check failed
Returns RSS feed in JSON format using feed URL.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
102
Wandbox API
Last check failed
Code compiler supporting 35+ languages mentioned at wandbox.org.
- No API key needed
- HTTPS
No authHTTPSCORS ?
103
HTTP2.Pro API
Last check failed
Test endpoints for client and server HTTP/2 protocol support.
- No API key needed
- HTTPS
No authHTTPSCORS ?
104M
MicroENV API
Last check failed
Fake Rest API for developers.
- No API key needed
- HTTPS
No authHTTPSCORS ?
105
BrewPage API
Last check failed
Free hosting for HTML, JSON, key-value, files, multi-file sites with short URLs and TTL retention.
- No API key needed
- HTTPS
No authHTTPSNo CORS

Keyless Development APIs compared

Development APIs with no API key
API	API key	HTTPS	CORS	Uptime	Response	Rating
Icanhazip	No	Yes	Yes	Up	278 ms	Not rated
Index Agentica	No	Yes	Yes	Up	382 ms	Not rated
Open VSX	No	Yes	Yes	Up	270 ms	Not rated
RubyGems	No	Yes	Yes	Up	360 ms	Not rated
Statically	No	Yes	Yes	Up	324 ms	Not rated
TidyTools	No	Yes	Yes	Up	157 ms	Not rated
24 Pull Requests	No	Yes	Yes	Up	852 ms	Not rated
ApicAgent	No	Yes	Yes	Up	1108 ms	Not rated
APIzone	No	Yes	Yes	Up	513 ms	Not rated
Cloudflare Trace	No	Yes	Yes	Up	785 ms	Not rated
CORS Proxy	No	Yes	Yes	Up	1056 ms	Not rated
crates.io	No	Yes	Yes	Up	963 ms	Not rated
DigMyName	No	Yes	Yes	Up	656 ms	Not rated
EndOfLife.date	No	Yes	Yes	Up	783 ms	Not rated
Fair Draw	No	Yes	Yes	Up	576 ms	Not rated
GeraCode	No	Yes	Yes	Up	550 ms	Not rated
GithubTrends	No	Yes	Yes	Up	677 ms	Not rated
Httpbin	No	Yes	Yes	Up	924 ms	Not rated
Image-Charts	No	Yes	Yes	Up	997 ms	Not rated
Is This Site Down?	No	Yes	Yes	Up	1102 ms	Not rated
jsDelivr	No	Yes	Yes	Up	676 ms	Not rated
Kroki	No	Yes	Yes	Up	591 ms	Not rated
LiveOrDown	No	Yes	Yes	Up	526 ms	Not rated
macadress	No	Yes	Yes	Up	463 ms	Not rated
MyIPRightNow	No	Yes	Yes	Up	445 ms	Not rated
NetworkCalc	No	Yes	Yes	Up	808 ms	Not rated
NuGet	No	Yes	Yes	Up	468 ms	Not rated
OutageDeck	No	Yes	Yes	Up	611 ms	Not rated
ProxyForge	No	Yes	Yes	Up	543 ms	Not rated
QR code	No	Yes	Yes	Up	776 ms	Not rated
QR Code Crafter	No	Yes	Yes	Up	1036 ms	Not rated
QuickChart	No	Yes	Yes	Up	718 ms	Not rated
Quotable	No	Yes	Yes	Up	528 ms	Not rated
Sonar	No	Yes	Yes	Up	670 ms	Not rated
Thunder Client	No	Yes	Yes	Up	636 ms	Not rated
Timezone WorldTime	No	Yes	Yes	Up	791 ms	Not rated
TinyMind Agent Tools	No	Yes	Yes	Up	611 ms	Not rated
Vornamencheck	No	Yes	Yes	Up	440 ms	Not rated
Beeceptor	No	Yes	Yes	Up	427 ms	Not rated
BountyCheck	No	Yes	Yes	Up	607 ms	Not rated
dotsweep	No	Yes	Yes	Up	593 ms	Not rated
ExtendsClass JSON Storage	No	Yes	Yes	Up	488 ms	Not rated
IPify	No	Yes	Unknown	Up	349 ms	Not rated
JSONPlaceholder	No	Yes	Yes	Up	539 ms	Not rated
Nationalize.io	No	Yes	Yes	Up	1133 ms	Not rated
Orca Scan	No	Yes	Yes	Up	519 ms	Not rated
Qrcode Monkey	No	Yes	Unknown	Up	86 ms	Not rated
TheQRCode	No	Yes	Yes	Up	835 ms	Not rated
AgentPay Domain Lookup	No	Yes	Yes	Up	607 ms	Not rated
CDNJS	No	Yes	Unknown	Up	614 ms	Not rated
ChartBytes	No	Yes	Yes	Up	776 ms	Not rated
claudecookie	No	Yes	Yes	Up	1859 ms	Not rated
Codeberg	No	Yes	Yes	Up	548 ms	Not rated
DownStatus	No	Yes	Yes	Up	548 ms	Not rated
HostDealRadar	No	Yes	Yes	Up	532 ms	Not rated
Icanhazepoch	No	Yes	Yes	Up	1619 ms	Not rated
msgboard	No	Yes	No	Up	504 ms	Not rated
Nerdulator	No	Yes	Yes	Up	565 ms	Not rated
XLSX Inspector	No	Yes	Yes	Up	1195 ms	Not rated
Agent Nexus	No	Yes	Yes	Up	8197 ms	Not rated
Agify.io	No	Yes	Yes	Up	1218 ms	Not rated
Codex	No	Yes	Unknown	Up	911 ms	Not rated
DomainDb Info	No	Yes	Unknown	Up	806 ms	Not rated
Genderize.io	No	Yes	Yes	Up	1214 ms	Not rated
Hex	No	Yes	Unknown	Up	598 ms	Not rated
Homebrew Formulae	No	Yes	Unknown	Up	255 ms	Not rated
IFTTT	No	Yes	Unknown	Up	764 ms	Not rated
IPinfo	No	Yes	Unknown	Up	586 ms	Not rated
JSON 2 JSONP	No	Yes	Unknown	Up	711 ms	Not rated
MY IP	No	Yes	Unknown	Up	711 ms	Not rated
npm Registry	No	Yes	Unknown	Up	975 ms	Not rated
oyyi	No	Yes	Yes	Up	2732 ms	Not rated
W3C Validator	No	Yes	Unknown	Up	283 ms	Not rated
API Tool Calls	No	Yes	No	Up	815 ms	Not rated
Aquanode	No	Yes	No	Up	609 ms	Not rated
Ciprand	No	Yes	No	Up	542 ms	Not rated
Domain Info by LifeStep	No	Yes	Yes	Up	1416 ms	Not rated
License-API	No	Yes	No	Up	591 ms	Not rated
Litport Free Proxy	No	Yes	No	Up	723 ms	Not rated
Packagist	No	Yes	No	Up	619 ms	Not rated
QR code	No	Yes	Unknown	Up	789 ms	Not rated
QR Code by LifeStep	No	Yes	Yes	Up	1256 ms	Not rated
ReplyNodes	No	Yes	No	Up	601 ms	Not rated
API Grátis	No	Yes	Unknown	Up	507 ms	Not rated
Bored	No	Yes	Unknown	Up	638 ms	Not rated
Changelogs.md	No	Yes	Unknown	Up	2351 ms	Not rated
DigitalOcean Status	No	Yes	Unknown	Up	1227 ms	Not rated
Hipsum	No	Yes	Unknown	Up	876 ms	Not rated
isitdownstatus	No	Yes	Unknown	Up	552 ms	Not rated
Keyvalue	No	Yes	Unknown	Up	674 ms	Not rated
APIs.guru	No	Yes	Unknown	Up	3581 ms	Not rated
Go Module Proxy	No	Yes	Unknown	Up	1224 ms	Not rated
Serialif Color	No	Yes	No	Up	708 ms	Not rated
host-t.com	No	Yes	No	Up	1906 ms	Not rated
SHOUTCLOUD	No	No	Unknown	Up	802 ms	Not rated
CountAPI	No	Yes	Yes	Down	–	Not rated
ip-fast.com	No	Yes	Yes	Down	–	Not rated
Lua Decompiler	No	Yes	Yes	Down	–	Not rated
Mocky	No	Yes	Yes	Down	–	Not rated
QR & Barcode	No	Yes	Yes	Down	–	Not rated
RSS feed to JSON	No	Yes	Yes	Down	–	Not rated
Wandbox	No	Yes	Unknown	Down	–	Not rated
HTTP2.Pro	No	Yes	Unknown	Down	–	Not rated
MicroENV	No	Yes	Unknown	Down	–	Not rated
BrewPage	No	Yes	No	Down	–	Not rated

FAQ

Are there free Development APIs without an API key?

Yes. 105 free Development APIs need no API key or sign-up, including Icanhazip API, Index Agentica API and Open VSX API. You can send a request straight away.

Which keyless Development APIs can I call from JavaScript in the browser?

67 of them also support CORS, including Icanhazip API, Index Agentica API and Open VSX API, so a plain fetch from a web page works.

Do APIs without a key have limits?

Usually, yes. Keyless APIs typically rate-limit by IP address, so cache responses and avoid tight loops. For production traffic, an API with a free key tier often gives higher, more predictable limits.