Best API AI tools
Designing, calling and testing HTTP APIs, including client generation, collections and request tooling. The 15 highest-ranked of the 64 apps tagged API in the Onei AI catalogue.
Everything tagged API: apps, skills and MCP servers
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Google
Google's browser workbench for prototyping with Gemini models, then shipping the same prompt as production API code.
Also: Developers · Editor's pick
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One API and one bill for hundreds of language models, with automatic failover between providers.
Also: Developers, LLM Gateway · Editor's pick
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One API for agent harnesses — run Codex, Claude Code or Hermes behind your product with shared sessions, streaming, files and cost controls, and swap harness with a config change.
Also: Developers, LLM Gateway · Editor's pick
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Turn any website into clean markdown or structured JSON — crawling, JavaScript rendering, and extraction in one API.
Editor's pick
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Privacy-first AI gateway putting 600+ models from 90+ providers behind one OpenAI-compatible API, with no prompt or output logging.
Also: Developers, LLM Gateway · Editor's pick
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Mindcase Technologies Private Limited
Web data extraction APIs for AI agents — 75+ ready-made scrapers for LinkedIn, Amazon, Google Maps, Reddit and X, priced per result.
Also: MCP · Editor's pick
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Open-source, self-hostable managed agent platform: run durable AI agents on any model and any machine through one API, CLI and SDK.
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Twitter/X data API for developers and AI agents: tweets, profiles, followers, search and real-time monitoring via REST, plus a hosted MCP server for Claude, Cursor and any MCP client.
Also: MCP
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You.com sells web search, content extraction, answer and research APIs for AI agents; its consumer chat closed to new users in 2026.
Also: Developers, MCP
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AI image and vector generator for designers, with editable SVG output, custom styles, mockups, a Figma plugin, API and MCP server.
Also: Image Generation, MCP
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Readwise
Read-it-later app for articles, PDFs, EPUBs, newsletters, RSS and YouTube, with highlighting, AI chat and sync to Readwise reviews.
Also: MCP
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Quora
Quora's chat app for using many AI models in one place, from GPT and Claude to image, video and voice models, plus custom bots.
Also: Image Generation
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Collaborative presentation workspace with Pitch Agent for on-brand AI decks, tracked share links, deal rooms and an MCP connector.
Also: MCP
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Leonardo.Ai is Canva's image and video generation platform, with its own and third-party models, reusable Blueprints, style training and an API.
Also: Image Generation
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Ideogram is an image and video generation platform known for legible text in images, with a layer-based editor, an API and an MCP server.
Also: Image Generation, MCP
How this list is ranked
Ranked by editorial weight (0–100), plus 5 points per bookmark up to 10, plus or minus up to 20 for the average review rating; ties go to featured apps, then the most recently updated. Discontinued apps are never ranked.