# Top API Tools

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](<https://creatorstoolbox.com/tools/mailersend>) — Email API and SMTP relay for application messages.

- [SMTP2GO](<https://creatorstoolbox.com/tools/smtp2go>) — SMTP relay and email API with monthly sending allowances.

- [Mailgun](<https://creatorstoolbox.com/tools/mailgun>) — Application email delivery through REST APIs and SMTP.

- [Bento](<https://creatorstoolbox.com/tools/bento>) — Email marketing and automation, with a separate transactional email service.

- [Resend](<https://creatorstoolbox.com/tools/resend>) — Developer email delivery and hosted newsletter broadcasts.

- [Amazon SES](<https://creatorstoolbox.com/tools/amazon-ses>) — AWS email delivery for applications and self-hosted newsletter software.

- [PostShiba](<https://creatorstoolbox.com/tools/postshiba>) — Email delivery priced by dedicated sending-cluster capacity.

- [Postmark](<https://creatorstoolbox.com/tools/postmark>) — Application email delivery with separate transactional and broadcast streams.

- [SendGrid](<https://creatorstoolbox.com/tools/sendgrid>) — Twilio email delivery for applications using the SendGrid Email API.

- [Airwallex](<https://creatorstoolbox.com/tools/airwallex>) — Global financial platform for business accounts, payments, invoicing, subscriptions, and international payouts.

- [Stripe](<https://creatorstoolbox.com/tools/stripe>) — Payments and financial infrastructure for the internet — checkout, subscriptions, invoicing, marketplaces, fraud tools, and tax, in 135+ currencies.

- [OpenRouter](<https://creatorstoolbox.com/tools/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](<https://creatorstoolbox.com/tools/liveavatar>) — Lifelike realtime avatar API for conversational AI agents, powered by HeyGen research.

- [X](<https://creatorstoolbox.com/tools/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](<https://creatorstoolbox.com/tools/fal>) — A generative media platform and inference API for running fast image, video, and audio AI models at scale.

- [WaveSpeed](<https://creatorstoolbox.com/tools/wavespeed>) — AI media generation platform with 1,000+ top-tier models for fast image, video, and audio generation at scale.

- [AgentMail](<https://creatorstoolbox.com/tools/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](<https://creatorstoolbox.com/tools/fern-agent-score>) — Check if your documentation is AI-ready — run 22 checks and get a letter grade in seconds.

- [Plaid](<https://creatorstoolbox.com/tools/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](<https://creatorstoolbox.com/tools/google-ai-studio>) — Build, test, and deploy AI apps with Gemini — Google's free web-based IDE for generative AI prototyping.

- [Firehose](<https://creatorstoolbox.com/tools/firehose>) — Real-time web data streaming API — define filter rules and receive instant updates when matching pages are crawled.

- [HiAPI](<https://creatorstoolbox.com/tools/hiapi>) — Access image, video, audio, and text generation models through a unified developer API and asynchronous task workflow.

- [JevModel](<https://creatorstoolbox.com/tools/jevmodel>) — Typed decision API for support triage, moderation, chatbot routing, scoring, and agent gates. Each call returns structured JSON.

- [viewmax studio](<https://creatorstoolbox.com/tools/viewmax-studio>) — Chat-based AI video generator. Describe a video in chat and create it with leading models.

- [Genviral](<https://creatorstoolbox.com/tools/genviral>) — Genviral is an agentic social media platform that brings content creation, scheduling, publishing, and performance analysis into one workspace.

- [wan ai video](<https://creatorstoolbox.com/tools/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.

[Try Top API Tools](<https://creatorstoolbox.com/top-api-tools>)

---
Canonical source: https://creatorstoolbox.com/top-api-tools