Platform-ready posts for 16 networks, in any language and any brand tone.
How to get a free Artificial intelligence API key
Four steps from a blank editor to a working call, across the 13 Artificial intelligence APIs in this catalogue — all on a plan that costs nothing.
The steps
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Compare the options
This catalogue has 13 Artificial intelligence APIs with a free plan. Sort them by endpoint count, latency or subscribers and shortlist two or three that cover what you need.
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Open the listing and subscribe to the free plan
Every listing links straight to the marketplace page. AI Social Media Content Generator is the most subscribed one in this category, which makes it a safe first stop. The Basic plan costs $0 and asks for no card.
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Copy your API key
The key appears the moment the subscription is created. It goes in a request header — never in front-end code or a public repository.
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Make the first call and check the quota
The marketplace playground runs a real request in the browser before you write any code. Once it answers, watch the monthly quota: the free tier is generous but not unlimited, and every Artificial intelligence listing publishes its own limit.
Which Artificial intelligence API to start with
Facial analysis that returns an attractiveness score, gender and estimated age.
Natal chart calculation, character analysis and daily horoscopes from birth data.
Translation with a chosen emotional tone — 24 emotions across 24 languages.
Create, customise and deploy AI agents for automation, support and smart workflows.
Generate API scaffolding for NestJS and FastAPI, plus SQL for Postgres.
Artificial intelligence APIs → Best free Artificial intelligence APIs →
Frequently asked questions
- How many free Artificial intelligence APIs are listed here?
- This catalogue lists 13 Artificial intelligence APIs, all with a plan that costs $0. The most used are AI Social Media Content Generator, AI Attractiveness Score, Gender & Age Detection, Birth Chart, Character Analysis & Daily Horoscope.
- Which free Artificial intelligence API covers the most endpoints?
- AI Social Media Content Generator covers the most ground with 6 endpoints.
- Which free Artificial intelligence API answers fastest?
- AI Social Media Content Generator answers fastest, at 4751ms.
- What does the cheapest paid Artificial intelligence plan cost?
- Past the free plan, AI Social Media Content Generator is the cheapest at $9.99 a month.
- Are these Artificial intelligence APIs really free?
- Yes. Every Artificial intelligence API listed here has a plan that costs $0 a month and needs no card. Paid plans exist for higher volume and their prices are in the table above.