api Tools

Meet the new Mubert API. Edit tracks, swap stems, and generate more consistent music with our latest engine. Create tracks up to 2 hours long, stream music in real time, and integrate Mubert into your pipeline in minutes with Skills.

Self-hosted Next.js/TypeScript boilerplate: full OAuth 2.1 + PKCE, API key management with zero-downtime rotation, usage-based Stripe billing, and Redis rate limiting. 7 modules, 300+ tests. One-time €79, no revenue share, no platform lock-in. The metering core is free and open source on npm.

Dear ImGui is a bloat-free graphical user interface library for C++. It solves the problem of creating lightweight, custom UIs for tools, debuggers, and games without heavy dependencies or complex frameworks. It outputs vertex buffers that you can render directly, making it ideal for developers who need an immediate-mode interface that integrates seamlessly with their custom rendering pipeline.

Criblist turns SF apartment hunting into a swipeable deck. Set your budget, neighborhoods, and must-haves, then browse live rentals from Craigslist and local property managers. Context.dev powers the extraction and source data. Keep the good ones.

Building an AI agent backend yourself takes months: sandboxes, orchestration, retries, cost controls. HarnessRouter runs it for you. One API in, finished work out: code, files, videos, games. Trusted by top medical research institutions, leading healthcare companies, and cutting-edge startups in multiple domains.

The Absolute Easiest Way to Ping Your Phone NotifyBridge is the ultimate backend built for makers, smart home hobbyists, and developers who just want their hardware to work. Instead of spending hours fighting with heavy mobile SDKs, platform certificates, or massive cloud dashboards, our lightweight REST API lets any ESP32, Arduino, or Raspberry Pi project drop a simple webhook to trigger instant mobile alerts.

One command gives your Hermes agent social intelligence. It decides when to speak, adapts to your group's tone and remembers who said what. Works in group chats on Slack, Telegram and WhatsApp.

Your API lives in your design tool, your docs, your mocks, your tests, your monitoring — and every copy drifts. Routebase makes them one living source: change the spec, publish, and it catches what drifted. (Your AI agents read the same source over MCP.)

Manifest turns any webpage into a structured JSON map of what an AI agent can click, fill, and submit. One API call, no fragile selectors. Every action comes with resolved CSS/role locators, plus a requires field that encodes dependencies between elements (e.g. "select a plan before this button is clickable"). That's context aria snapshots don't give you. Python SDK, LangChain support, and an MCP server included. Built for anyone shipping browser agents.

Fast and optimized open-model inference on multi-region infrastructure with zero request retention.

Simba Voice Agents: build production voice agents on Simba 3.2, the #1 model on Artificial Analysis. Sub-100ms, streaming-native, real emotion and SSML. The best real-time voice, now a full agent platform, on Speechify's new Speechify Developer Platform.

UnitPay is the monetization OS for AI companies. Design pricing, run usage-based billing, track inference costs and margins in real time, and show every customer the value they're actually getting — all in one system. Built ground-up for AI-native products: credits, hybrid pricing, per-token metering, cost tracking. Free until you hit $500K ARR.

Most API tests stop at 200 OK. FetchSandbox lets developers and AI agents verify what happens next—webhooks, retries, state changes, async workflows, and failure scenarios. It reproduces the real bug, proves the fix, and remembers what breaks—so your agent catches it before production. Connect via MCP to Cursor, Claude Code, Windsurf, VS Code, and Codex. Explore 60+ APIs—Stripe, GitHub, Clerk, Resend, Twilio, Descope, OpenAI—without burning real API quota or waiting on staging.

Auriko treats LLM providers as trading venues and arbitrages the spread. Built by ex-quant traders, Auriko’s cost-arbitrage engine calibrates to each user’s request patterns and selects optimized inference paths based on token price, cache behavior, latency, reliability, and request quality. Auriko benchmarks show average 30% cost reduction against industry peers and direct providers. See the source: https://www.auriko.ai/reports/llm-cost-arbitrage

One API key to 300+ models, hosted in the EU. Drop-in compatible with the OpenAI, Anthropic, and Google SDKs: switching is a base URL change. What's different: ~half our 30+ providers run inference in Europe, one EU sub-processor covers every model, no prompts stored by default. Add the control plane for routing, PII masking, per-team spend caps, and audit trails. Agent-native: paste one line into Claude Code or Cursor and it sets up Opper for you. No markup on tokens, 3% fee on credit top-ups.

Universal-3.5 Pro is AssemblyAI's most accurate speech-to-text model, now available at our Realtime & Async endpoints. It transcribes every conversation exactly as it's heard—code-switching across 18 languages, our most accurate speaker diarization yet, and contextual prompting to steer results.

Completely free. Get back everything you need to render a rich link card in your app – the kind you see in Slack, iMessage, or Twitter when someone pastes a link. Dedicated handling for popular websites like YouTube, Amazon, Twitter, Airbnb, SoundCloud, NYT, Vimeo, Giphy, and more. These return reliable, high-quality previews every time. Built in image validation, and JavaScript rendering. Works directly from the browser, no proxy server required. Free usage up to 20,000 link previews.

One open-source API for startup data across Y Combinator AND a16z - 6,600+ companies with funding, stage, IPO/M&A exits, and founders. Filter by VC (yc/a16z/all), batch, industry, country, or search. Grab a free API key, read the docs (curl/Node/Python + Swagger), and build in 30 seconds. Plus the full web app: map, analytics, funding data, a live hiring board, and AI tools.

Social media scraping API for public profiles, posts, comments, videos, transcripts, and metrics from TikTok, Instagram, YouTube, X, LinkedIn, and more. Pay-as-you-go credits, 100 free to start.

Social media scraping API for public profiles, posts, comments, videos, transcripts, and metrics from TikTok, Instagram, YouTube, X, LinkedIn, and more. Pay-as-you-go credits, 100 free to start.

Compression V2 cuts coding-agent token bills with three techniques across two layers: sharper tool result trimming, new task-aware tool surface reduction, and output brevity. Drop-in for Claude Code, Codex, OpenCode, and Cursor. Semantically lossless.