Browse free api tools for designers and creators — interactive generators, calculators, and utilities.
About Top API Tools
Top API Tools is a tool listed on Creators Toolbox. Check the publisher's website for current pricing, availability, and requirements.
26 Top API Tools
MailerSend — Email API and SMTP relay for application messages.
SMTP2GO — SMTP relay and email API with monthly sending allowances.
Mailgun — Application email delivery through REST APIs and SMTP.
Bento — Email marketing and automation, with a separate transactional email service.
Resend — Developer email delivery and hosted newsletter broadcasts.
Amazon SES — AWS email delivery for applications and self-hosted newsletter software.
PostShiba — Email delivery priced by dedicated sending-cluster capacity.
Postmark — Application email delivery with separate transactional and broadcast streams.
SendGrid — Twilio email delivery for applications using the SendGrid Email API.
Airwallex — Global financial platform for business accounts, payments, invoicing, subscriptions, and international payouts.
Stripe — Payments and financial infrastructure for the internet — checkout, subscriptions, invoicing, marketplaces, fraud tools, and tax, in 135+ currencies.
OpenRouter — One API for 500+ AI models across 80+ providers — pay with credits that work anywhere, with automatic fallback when a provider goes down.
LiveAvatar — Lifelike realtime avatar API for conversational AI agents, powered by HeyGen research.
X — The real-time everything app — posts, news, and conversation, plus the X API and a hosted MCP server for connecting AI agents to real-time data.
fal — A generative media platform and inference API for running fast image, video, and audio AI models at scale.
WaveSpeed — AI media generation platform with 1,000+ top-tier models for fast image, video, and audio generation at scale.
AgentMail — API-first email for AI agents — give any app or agent its own inbox to send, receive, and reply to emails programmatically.
Agent Score by Fern — Check if your documentation is AI-ready — run 22 checks and get a letter grade in seconds.
Plaid — Connect your app to users' bank accounts — the API that powers fintech. Build financial products with easy, safe, and reliable data access.
Google AI Studio — Build, test, and deploy AI apps with Gemini — Google's free web-based IDE for generative AI prototyping.
Firehose — Real-time web data streaming API — define filter rules and receive instant updates when matching pages are crawled.
HiAPI — Access image, video, audio, and text generation models through a unified developer API and asynchronous task workflow.
JevModel — Typed decision API for support triage, moderation, chatbot routing, scoring, and agent gates. Each call returns structured JSON.
viewmax studio — Chat-based AI video generator. Describe a video in chat and create it with leading models.
Genviral — Genviral is an agentic social media platform that brings content creation, scheduling, publishing, and performance analysis into one workspace.
wan ai video — Wan AI - AI Video Generator | Text to Video | Image to Video | Voiceover Creation
Wan AI Video Generator for Text to Video, Image to Video, and Voiceover Creation
Create cinematic AI videos from a text prompt or image. Start with 2 free standard-quality previews, then upgrade for HD output, longer videos, and advanced creative controls.