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APIs with no key reported

Explore APIs listed as requiring no private key. Access is source-reported for community entries; rate limits and usage terms still apply.

1,009APIs to explore

Community listing

Science

CycleCalcs

Interpreted astronomy: sun and moon times, moon phases, planets, eclipses, seasons

◇ Reported: No keyCheck pricing

Community listing

Science

Europe PMC

Life-science literature search with abstracts, citations and full-text links

◇ Reported: No keyCheck pricing

Community listing

Science

iDigBio

Access millions of museum specimens from organizations around the world

◇ Reported: No keyCheck pricing

Community listing

Science

inspirehep.net

High Energy Physics info. system

◇ Reported: No keyCheck pricing

Community listing

Science

isEven (humor)

Check if a number is even

◇ Reported: No keyCheck pricing

Community listing

Science

ISRO

ISRO Space Crafts Information

◇ Reported: No keyCheck pricing

Community listing

Science

ITIS

Integrated Taxonomic Information System

◇ Reported: No keyCheck pricing

Community listing

Science

Launch Library 2

Spaceflight launches and events database

◇ Reported: No keyCheck pricing

Community listing

Science

Minor Planet Center

Asterank.com Information

◇ Reported: No keyCheck pricing

Community listing

Science

MyGene.info

Gene annotation queries and ID lookup

◇ Reported: No keyCheck pricing

Community listing

Science

Newton

Symbolic and Arithmetic Math Calculator

◇ Reported: No keyCheck pricing

Community listing

Science

Noctua

REST API used to access NoctuaSky features

◇ Reported: No keyCheck pricing

Community listing

Science

Numbers

Facts about numbers

◇ Reported: No keyCheck pricing

Community listing

Science

Ocean Facts

Facts pertaining to the physical science of Oceanography

◇ Reported: No keyCheck pricing

Community listing

Science

Open Notify

ISS astronauts, current location, etc

◇ Reported: No keyCheck pricing

Community listing

Science

Open Science Framework

Repository and archive for study designs, research materials, data, manuscripts, etc

◇ Reported: No keyCheck pricing

Community listing

Science

OpenAlex

Open catalog of scholarly works, authors, institutions, sources, and concepts

◇ Reported: No keyCheck pricing

Community listing

Science

Purple Air

Real Time Air Quality Monitoring

◇ Reported: No keyCheck pricing

Community listing

Science

RCSB PDB

3D structures of proteins and nucleic acids

◇ Reported: No keyCheck pricing

Community listing

Science

Remote Calc

Decodes base64 encoding and parses it to return a solution to the calculation in JSON

◇ Reported: No keyCheck pricing

Community listing

Science

Semantic Scholar

Academic search engine for papers, authors, and citations

◇ Reported: No keyCheck pricing

Community listing

Science

SHARE

A free, open, dataset about research and scholarly activities

◇ Reported: No keyCheck pricing

Community listing

Science

SpaceX

Company, vehicle, launchpad and launch data

◇ Reported: No keyCheck pricing

Community listing

Science

SpaceX

GraphQL, Company, Ships, launchpad and launch data

◇ Reported: No keyCheck pricing

Community listing

Science

Tallytopia

Calculators for finance, health, math, space and sports with step-by-step results

◇ Reported: No keyCheck pricing

Community listing

Science

Times Adder

With this API you can add each of the times introduced in the array sended

◇ Reported: No keyCheck pricing

Community listing

Science

TLE

Satellite information

◇ Reported: No keyCheck pricing

Community listing

Science

USGS Water Services

Water quality and level info for rivers and lakes

◇ Reported: No keyCheck pricing

Community listing

Science

xMath

Random mathematical expressions

◇ Reported: No keyCheck pricing

Community listing

Security

Classify

Encrypting & decrypting text messages

◇ Reported: No keyCheck pricing

Community listing

Security

CSR.plus

Generate certificate signing requests and private keys without OpenSSL

◇ Reported: No keyCheck pricing

Community listing

Security

dead-drop

Ephemeral zero-knowledge encrypted data sharing

◇ Reported: No keyCheck pricing

Community listing

Security

Dehash.lt

Hash decryption MD5, SHA1, SHA3, SHA256, SHA384, SHA512

◇ Reported: No keyCheck pricing

Community listing

Security

EmailRep

Email address threat and risk prediction

◇ Reported: No keyCheck pricing

Community listing

Security

Escape

An API for escaping different kind of queries

◇ Reported: No keyCheck pricing

Community listing

Security

FilterLists

Lists of filters for adblockers and firewalls

◇ Reported: No keyCheck pricing

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Know what’s been checked. Reviewed guides include provider documentation and examples. Community listings contain reported information that may have changed. Our methodology →