Platform-ready posts for 16 networks, in any language and any brand tone.
Best free Artificial intelligence APIs
13 Artificial intelligence APIs with a free plan, compared side by side on endpoints, latency and price.
Which one to pick
- AI Social Media Content Generator covers the most ground with 6 endpoints.
- AI Social Media Content Generator answers fastest, at 4751ms.
- Grok API — direct access was updated most recently, on 2026-05-26.
- Past the free plan, AI Social Media Content Generator is the cheapest at $9.99 a month.
Choosing between APIs in the same category usually comes down to four numbers: how much surface the API covers, how fast it answers, how reliably it stays up and what it costs once the free tier runs out. The table below puts those numbers next to each other so the comparison takes a minute rather than an afternoon of tab-switching.
Every service listed here has a plan that costs nothing and needs no card, so the shortlist can be tested before any of it is paid for.
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.
Best free Artificial intelligence APIs
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.
Compress prompts, cut token cost and enforce JSON schema across major models.
Emotional tone, trends and the drivers behind them in any text.
Build characters with a personality, traits and backstory, then talk to them.
A single REST interface onto OpenAI models for chat and automation.
Content generation and task automation over the GPT-4o model.
Text generation, chatbots, SEO writing and document analysis over a REST API.
Full REST access to Grok with no added filtering layer.