Best APIs of April 2026

1. 1

   1. Plurai

   732 upvotes

   Vibe-train evals and guardrails tailored to your use case

   Vibe training for AI agent reliability. Describe what your agent should and should not do — Plurai generates training data, validates it, and deploys a custom model in minutes. It feels like vibe coding, but for evaluation and guardrails.…

   #1 on April 29, 2026plurai.ai8 makers, 8 with emails
2. 2

   2. Claude Opus 4.7

   552 upvotes

   Claude’s most capable model for reasoning and agentic coding

   Claude Opus 4.7 is Anthropic’s most advanced generally available AI model, built for complex reasoning and agentic coding. It handles long-running tasks, follows instructions precisely, verifies outputs, and delivers high-quality results…

   #1 on April 17, 2026claudeopus.app
3. 3

   3. GPT-5.5 by OpenAI

   458 upvotes

   OpenAI's smartest and most intuitive to use model yet

   GPT-5.5 is OpenAI’s most advanced model yet, designed to handle real-world work with greater autonomy, speed, and efficiency. It excels at coding, research, data analysis, and task execution — planning, using tools, and iterating with…

   #1 on April 26, 2026
4. 4

   4. Social Fetch

   268 upvotes

   Scraper API for TikTok, Instagram, YouTube, X & more.

   Social Fetch is a production API for public social data. Fetch profiles, posts, comments, videos, transcripts, metrics, and engagement signals from TikTok, Instagram, YouTube, X, LinkedIn, Facebook, Reddit, and Threads without maintaining…

   #3 on April 28, 20261 maker
5. 5

   5. Gemini Deep Research Agent

   221 upvotes

   Web and MCP research agents, now in Gemini API

   Two research agents in the Gemini API: Deep Research for low-latency interactive workflows, Deep Research Max for exhaustive async synthesis. Both support MCP data sources and native chart generation. For developers and AI engineers.

   #5 on April 30, 2026
6. 6

   6. Zernio Ads API

   218 upvotes

   Create, manage & report ads on 6 platforms via one API

   Building ad integrations with Meta, Google, TikTok, LinkedIn, Pinterest, and X means 6 developer apps, 6 OAuth flows, 6 campaign object models, and months of engineering. Zernio replaces all of that with a single endpoint. No developer…

   #6 on April 22, 20261 maker
7. 7

   7. GLM-5V-Turbo

   208 upvotes

   Vision-to-code foundation model for real GUI automation

   GLM-5V-Turbo is Z.AI's first multimodal coding model. It understands images, video, files, and UI layouts, then turns that visual context into runnable code, debugging help, and stronger agent workflows with Claude Code and OpenClaw.

   #4 on April 2, 20261 maker
8. 8

   8. Mercury Edit 2

   169 upvotes

   Ultra-fast next-edit prediction for coding

   Mercury Edit 2 is a coding-focused diffusion LLM built specifically for next-edit prediction. It uses your recent edits and codebase context to suggest the next change, with much higher acceptance and much lower latency than typical…

   #4 on April 4, 2026
9. 9

   9. Google Gemini 3.1 Flash TTS

   166 upvotes

   Text-to-speech API with natural language voice direction

   Google's TTS API with inline audio tags, multi-speaker dialogue, and 70+ language support. For developers building voice agents, dubbing tools, or AI content products via the Gemini API and Vertex AI.

   #7 on April 16, 20261 maker
10. 10

    10. Claude Managed Agents

    164 upvotes

    Pre-built agent harness on managed infrastructure

    Claude Managed Agents is a suite of composable APIs for building and deploying cloud-hosted agents. It handles sandboxing, authentication, tool execution, long-running sessions, and multi-agent coordination, letting teams focus on user…

    #15 on April 9, 20261 maker
11. 11

    11. Qwen3.6-Plus

    138 upvotes

    Multimodal AI optimized for real-world coding agents

    Qwen3.6-Plus is Qwen’s latest hosted model with a 1M context window, major gains in agentic coding, stronger multimodal reasoning, and much tighter support for real development workflows across tools like OpenClaw, Claude Code, and Qwen…

    #7 on April 3, 20261 maker
12. 12

    12. Wan 2.7-Image

    132 upvotes

    Interactive pixel-level editing and consistent storyboards

    Wan 2.7-Image by Alibaba brings unprecedented control to AI generation. It features interactive pixel-level editing (move, resize, edit text) and generates up to 12 highly consistent sequential images from a single prompt. Available via…

    #10 on April 2, 2026wan27image.com
13. 13

    13. Grok Voice Think Fast 1.0

    126 upvotes

    Our most capable voice agent is now available via API

    A state-of-the-art voice model built for complex, multi-step workflows with snappy responses and high accuracy.

    #6 on April 25, 2026
14. 14

    14. Docsio

    123 upvotes

    Lovable for doc sites

    Paste your URL and Docsio builds a complete, branded documentation site, in minutes. Your colors, your logo, your content. Edit with AI, preview live, publish to your domain. Start for free. No catch, no trial, no credit card.

    #13 on April 23, 20261 maker
15. 15

    15. Recost

    121 upvotes

    Your API costs fully visible.

    Recost shows you exactly what code is burning money before your API bill explodes. It maps cost to endpoints, flags waste like duplicate calls and bad loops, and simulates scale impact. With AST analysis and runtime tracking, you don’t…

    #21 on April 9, 2026recost.ai1 maker
16. 16

    16. SigmaMind MCP

    121 upvotes

    Build and control voice AI agents via MCP

    SigmaMind's MCP server exposes your entire voice AI stack as tools – agents, calls, campaigns, webhooks, phone numbers – manageable directly from your MCP client or IDE. Spin up agents, trigger test calls, debug with inline call records…

    #10 on April 13, 20261 maker
17. 17

    17. Grok Voice API

    121 upvotes

    Fast, accurate STT and TTS APIs at the best price

    Grok now offers standalone Speech-to-Text and Text-to-Speech APIs for developers. The new voice stack covers real-time and batch transcription, multispeaker diarization, multichannel audio, text formatting, expressive TTS with speech…

    #11 on April 18, 2026
18. 18

    18. Voice Agent API

    120 upvotes

    One API to build production-ready voice agents

    The fastest path to a working Voice Agent, built on the most accurate Voice AI in the market. Stream audio in, get audio back. We handle the rest. ~1s latency. Best-in-class accuracy on the stuff that matters (numbers, emails, names).…

    #20 on April 30, 20261 maker
19. 19

    19. Qwen3.6-Max-Preview

    118 upvotes

    The flagship Qwen for agentic coding

    Qwen3.6-Max-Preview is an early release of Qwen's next proprietary flagship. It delivers measurable improvements over Qwen3.6-Plus in agentic coding, world knowledge, and instruction following, securing top scores across major development…

    #11 on April 22, 20261 maker
20. 20

    20. Pioneer

    115 upvotes

    Fine-tune any LLM in minutes, with one prompt

    Fine-tune SLMs in minutes. Describe your task in plain English and our agent handles everything: data generation, training, evals, and deployment. Models deployed on Pioneer also keep improving automatically from live inference data. With…

    #16 on April 21, 20261 maker
21. 21

    21. Hookdeck Outpost

    114 upvotes

    Open-source outbound webhooks for your platform

    Send webhooks in minutes for one-tenth the cost. Outpost is open-source infrastructure that delivers to webhooks, SQS, Pub/Sub, RabbitMQ, Kafka, and more. Multi-tenant, at-least-once delivery, customer portal — self-hosted or managed.

    #15 on April 23, 20261 maker
22. 22

    22. MiMo-V2.5 Voice

    113 upvotes

    Bilingual ASR for dialects, code-switching, and songs

    MiMo-V2.5-ASR is an 8B open-source speech recognition model from Xiaomi that transcribes Mandarin, English, eight Chinese dialects, code-switched speech, and song lyrics. Built for ML engineers, researchers, and developers building…

    #7 on April 25, 2026
23. 23

    23. Cyris

    98 upvotes

    Turns every AI decision into audit-ready evidence

    Your AI agents make thousands of decisions a day. Can you prove what they did? Cyris auto-instruments 12+ LLM providers (OpenAI, Anthropic, Bedrock, Gemini, Ollama, more) with zero code changes. Every decision is logged into a…

    #32 on April 9, 20261 maker
24. 24

    24. LLM Ops Toolkit by Lamatic.ai

    96 upvotes

    Aggregate uptime monitoring across OpenAI, Claude, and more

    Interactive tools for managing 20+ LLM APIs in production. Cost calculator, diversity audit, and routing simulator.

    #15 on April 11, 20261 maker
25. 25

    25. AGG Loop

    93 upvotes

    Secure, forever-free localhost tunnels (ex-Deposure).

    We acquired Deposure and rebuilt it from the ground up! AGG Loop provides instant, highly secure localhost tunneling with zero config. 100% free forever with no bandwidth limits, fully backed by the Aeolink Group Inc. lab program.

    #13 on April 19, 20261 maker

Junior imports every day's Product Hunt leaderboard. Each launch is filed under the first topic its makers chose, so it appears in one category only. This list takes the API launches dated in April 2026 and ranks them by their upvotes. It refreshes daily.

• Best Productivity Tools228
• Best Design Tools77
• Best Open Source Tools86
• Best Developer Tools54
• Best Mac Apps42
• Best Android Apps31
• Best Marketing Tools43
• Best AI Tools41
• Best SaaS Tools40
• Best iOS Apps29
• Best Chrome Extensions31
• Best Analytics Tools30
• Best Health & Fitness Apps27
• Best Social Media Tools22
• Best Sales Tools26
• Best Fintech Tools17

• All APIs340
• Every launch in April 2026
• All best-of lists

What was the top API launch of April 2026?

Plurai ("Vibe-train evals and guardrails tailored to your use case"), with 732 upvotes on April 29, 2026, where it finished #1 of the day.

How many APIs launched in April 2026?

43 on Product Hunt, with 5,902 upvotes between them. This list shows the 25 most upvoted.

How is this list ranked?

By Product Hunt upvotes, as recorded on launch day. Ties go to the launch with the better daily rank. Every launch is counted once, in the category its makers listed first.

How do I reach the makers of these APIs?

Each launch links to its page on Junior, with the people behind it (24 makers across this list). Junior adds their verified work emails, LinkedIn and X profiles for subscribers.