API Tools
388 best API tools and apps, curated and ranked by community upvotes on ProductCool. Updated daily as new API products launch.
Write, structure, and publish technical documentation in a visual editor with Markdown mode, AI-assisted edits, reusable components, and version history.
Agentic video understanding is a new Gemini processing mode (3.7 Flash, 3.6 Flash, 3.5 Flash-Lite) that lets the model decide what to watch, at what speed, and through which modality, instead of a fixed frame rate. Cuts tokens by up to 88%, cost by up to 66%, boosts accuracy up to 7%, biggest wins on long-form video. Live now via Gemini API in AI Studio and Gemini Enterprise Agent Platform, just set processing to "agentic," standard pricing, no extra fee.
Live HTTP 402 API for agents: pay USDC on Base for research briefs, SEO audits, landing copy, and competitor reports. OpenAPI + x402scan listed.
Gemini 3.8 Flash and Gemini 3.8 Flash Cyber bring next-generation intelligence to agentic workflows and cybersecurity. Built for long-horizon coding, multi-step reasoning, autonomous tasks, and vulnerability detection, they deliver stronger performance at Flash speed and low cost.
Gemini 3.8 Flash and Gemini 3.8 Flash Cyber bring next-generation intelligence to agentic workflows and cybersecurity. Built for long-horizon coding, multi-step reasoning, autonomous tasks, and vulnerability detection, they deliver stronger performance at Flash speed and low cost.
We connect your AI agent to 1,800+ APIs without any subscriptions. SEO, lead gen, video/music generation, social media, stocks, market trends, on-chain data, competitor tracking, sentiment analysis, all unlocked with one key.
One OpenAI-compatible API for hundreds of models on attested infrastructure, end to end encryption, with Confidential routes, ZDR routes, provider failover, BYOK, and no prompt or output logs.
See which sites started using Stripe, Shopify or Next.js this week. Most of what we index we find ourselves: over 2.2+ million sites from public infrastructure signals, not submitted to us, across 40,000+ technologies. When we reach a launch before the boards, we're 14.5 days early. Browsing is free. Paid plans add Stackdar alerts, API access, bulk export with published contact details, and an MCP server for Claude, ChatGPT and Cursor.
Maritime helps companies that sell AI agents give every customer an agent with its own computer. Each agent runs in an isolated, persistent VM where it can use a browser, create files, run code, and keep its state. Maritime handles the infrastructure, scaling, and automatic sleep/wake, so you don’t have to build and manage thousands of VMs yourself. Built for companies running agents at scale, starting at $1 per agent per month.
Olostep provides scalable web data APIs, specifically designed for the web’s second user - AI. Effortlessly turn any URL into LLM-ready Markdown, JSON, or structured data.
Parse is Cohere's document vision parsing model. It transforms unstructured data in enterprise images and documents into structured data that downstream AI agents and applications can use. Handles OCR, tables/diagrams/images, and visual grounding via bounding boxes, across 9 languages. Deploy via API, cloud, or fully on-prem/air-gapped.
Look beyond the vendor name. Understand MAC addresses with IEEE block data, device-category clues, privacy-randomization signals and plain-English reasoning. Use it through the free lookup, JSON API, bulk databases, log extractor, MCP or self-hosted deployment.
Private company data with 4x the depth and 2x the coverage of PitchBook, plus 100+ event signals and news across companies, industries, and topics. Source and diligence deals or make outreach lists and trigger outbound. Built for financial services and GTM teams, pay-as-you-go.
Your agent's integration fix passes CI. The data is still wrong. FetchSandbox MCP reproduces the real failure on your code, fixes it, and proves the fix held. A receipt, not a vibe. 70+ API sandboxes. One config block in Cursor or Claude Code.
Mindcase is the infrastructure layer for extracting web data in a structured, usable format. Built for developers and AI teams that need reliable web data without managing scraping infrastructure. Access APIs across popular sources, or get anything across the web built as a custom API for your specific use case.
Stop overpaying for LLM inference and juggling multiple API integrations. Router.com provides a single API endpoint that routes every request to the lowest-cost model that meets your performance threshold—backed by Ramp's financial visibility. Start routing smarter today at router.com!
Checksum is an AI-native continuous testing platform for engineering teams shipping faster than manual QA can keep up. It generates, runs, and auto-heals end-to-end and API tests on every pull request, all as standard Playwright code in your own repo. When a test fails, Checksum tells you whether it found a real bug or a stale test, then fixes the false failures so your suite keeps pace with your coding agents.
Agent-first infrastructure for meetings. One API to capture 50+ real-time data points from Zoom, Google Meet, and Teams, with built-in voice infrastructure so your agent joins as a participant, listens, speaks, and acts while the call is happening.
Debug, monitor, and triage failed Stripe and Shopify webhooks instantly with Gemini AI. Turn cryptic JSON payloads into clear root causes and code-ready fixes.
Agents don't care about vendors - they want the best API for the task. treg gives your agent 2,600+ tools (SEO, social, leads, ads, scraping) behind one URL and one token. Search by task, see price/request/response, pay per call at 0% markup. Open source.
The Recall.ai Startup Program gives early-stage teams reliable meeting recording infrastructure at $0.25/hour for their first 10,000 hours, plus engineer support, fast bot joins, every recording product, MCP access, and calendar integration.