# ApyHub > Certified, production-ready APIs for the features every product eventually needs. One subscription, one bill, MCP-ready by default. Free tier, no card. ApyHub is a marketplace of certified, production-ready HTTP APIs. One API key and one subscription work across every service in the catalog. Usage is metered in *atoms* (a per-call credit unit). Every service, provider and blog page on this site is also available as Markdown by appending `.md` to its path, as are /catalog, /privacy, /terms and /provider-terms. Marketing pages are HTML only. ## Base URL REST calls go to `https://api.eu.apyhub.com`. Authenticate with an ApyHub API key in the `apy-token` header. That is the default region. A workspace provisioned in another region calls that region's host instead, with identical paths — `GET https://apyhub.com/api/public/regions` returns every region's hostname. ## Site - [ApyHub Pricing | One Subscription, the Whole Catalog](https://apyhub.com/pricing): Usage-based pricing across every API in the catalog. You pay in atoms, so a small lookup never costs the same as a heavy conversion. - [API Catalog | Certified, MCP-Ready API Endpoints](https://apyhub.com/catalog): Browse a growing catalog of certified APIs for AI, file conversion, data extraction, and validation. One subscription, MCP-ready. Free tier. - [ApyHub MCP: Put Your AI Assistant to Work](https://apyhub.com/mcp): One MCP connection gives your AI assistant over 1,500 certified tools it can run for you. Invoices, verification, transcription, reporting. No code. Free tier, no card. - [Publish Your API on ApyHub | Become a Provider](https://apyhub.com/become-a-provider): List a production API in under 10 minutes. We handle docs, validation, certification, billing, and agent readiness. Free to list, no exclusivity. - [Provider Revenue Split and Payouts | ApyHub](https://apyhub.com/provider-economics): How ApyHub shares revenue with API providers: a fixed per-atom floor rate on subscriptions, plus a 50/50 split on top-up calls, never below your floor. - [About ApyHub | Why We Built the Trusted API Layer](https://apyhub.com/about): The API catalog, redesigned for how teams actually consume APIs. Why we built ApyHub, how atoms work, and what certification actually means in practice. - [Enterprise API Catalog for AI Products | ApyHub](https://apyhub.com/enterprise): The enterprise API catalog for teams building AI products. Ready-made kits for document parsing, models, verification, PII redaction and output. One subscription, one catalog, EU, US and Asia regions. - [ApyHub Quickstart | First API Call in 5 Minutes](https://apyhub.com/quickstart): One subscription, the whole catalog, pricing that reflects the actual work. Get from sign-up to your first production call in about five minutes. - [ApyHub Support | Docs, Live Chat, and Bug Reports](https://apyhub.com/support): Found a bug or stuck on an integration? Reach the ApyHub team through community, email, live chat, or the AI assistant available on every page. - [Privacy Policy | How ApyHub Handles Your Data](https://apyhub.com/privacy): How ApyHub collects, stores, and protects your data, including sub-processors, retention periods, and your rights under GDPR. - [Terms of Service | Using the ApyHub Platform](https://apyhub.com/terms): The terms governing your use of the ApyHub platform, the API catalog, subscriptions, atoms, and acceptable use of the services you call through us. - [Provider Terms | Listing an API on ApyHub](https://apyhub.com/provider-terms): The terms governing API providers who list and sell on ApyHub, covering IP ownership, pricing control, payouts, and sunset obligations. - [ApyHub Blog | API Engineering Notes and Updates](https://apyhub.com/blog): Engineering notes, API design writing, compliance explainers, and product updates from the team building the ApyHub catalog. ## Machine-readable - [llms-full.txt](https://apyhub.com/llms-full.txt): every catalog service with its endpoints, inlined. - [sitemap.xml](https://apyhub.com/sitemap.xml): all indexable URLs. - [MCP server](https://mcp.eu.apyhub.com): every subscribed ApyHub API as MCP tools (streamable HTTP). Connect via OAuth (add the URL, sign in when prompted) or send `Authorization: Bearer `. ## API catalog 492 live services in 20 categories. Each category links to a Markdown page listing every service in it. A service can belong to more than one category, so the counts below sum to more than the catalog total. For the whole catalog in one fetch: https://apyhub.com/catalog.md (every service, one line each) or https://apyhub.com/llms-full.txt (every service with its endpoints inlined). - [Artificial Intelligence](https://apyhub.com/catalog/artificial-intelligence.md) — 98 services. LLM-powered APIs, ML models, intelligent classification + analysis. - [Audio Processing](https://apyhub.com/catalog/audio-processing.md) — 11 services. Transcription, text-to-speech, audio classification + manipulation. - [Communications](https://apyhub.com/catalog/communications.md) — 7 services. Email, SMS, push notifications, messaging APIs. - [Data Extraction](https://apyhub.com/catalog/data-extraction.md) — 64 services. Web scraping, parsing, OCR-driven data capture. - [Data Validation](https://apyhub.com/catalog/data-validation.md) — 55 services. Email, phone, address, identity, schema validation. - [Developer Tools](https://apyhub.com/catalog/developer-tools.md) — 90 services. Code formatters, regex, JSON/YAML/XML utilities, parsers. - [E-commerce Quick Tools](https://apyhub.com/catalog/ecommerce-quick-tools.md) — 9 services. SKU, pricing, inventory, product-feed utilities. - [File Conversion](https://apyhub.com/catalog/file-conversion.md) — 81 services. Format conversion across documents, images, audio, video. - [File Manipulation](https://apyhub.com/catalog/file-manipulation.md) — 74 services. Merge, split, compress, watermark, transform files. - [File Security](https://apyhub.com/catalog/file-security.md) — 8 services. Sanitisation, virus scanning, redaction, access-control. - [Finance](https://apyhub.com/catalog/finance.md) — 33 services. Currency conversion, FX rates, tax calculation, payments. - [Geolocation](https://apyhub.com/catalog/geolocation.md) — 47 services. Geocoding, reverse-geocoding, IP-to-location, time zones, maps. - [HR](https://apyhub.com/catalog/hr.md) — 24 services. Hiring, onboarding, payroll, employee data utilities. - [Image Processing](https://apyhub.com/catalog/image-processing.md) — 58 services. OCR, generation, resizing, transformation, classification. - [Marketing](https://apyhub.com/catalog/marketing.md) — 31 services. Campaign automation, analytics, lead enrichment. - [Security & Privacy](https://apyhub.com/catalog/security-privacy.md) — 31 services. Encryption, hashing, anonymisation, password tools. - [SEO](https://apyhub.com/catalog/seo.md) — 57 services. Keyword analysis, page audit, sitemap, structured-data tools. - [Smart Generation](https://apyhub.com/catalog/smart-generation.md) — 81 services. AI-driven content, code, image, document generation. - [Standard Data](https://apyhub.com/catalog/standard-data.md) — 58 services. Reference data: countries, currencies, languages, time zones. - [Travel](https://apyhub.com/catalog/travel.md) — 13 services. Flight, hotel, itinerary, location-aware travel APIs. - Other — 5 services. ### Other - [Calculate Business Days Across Countries and Markets](https://apyhub.com/callable-labs/service/calculate-business-days-across-countries-markets-api.md): Add or subtract business days, count working days between dates and find the next business day for 250 countries and 28 exchanges. Holidays are skipped. - [Retrieve Public Holidays by Country and Year](https://apyhub.com/callable-labs/service/retrieve-public-holidays-by-country-and-year-api.md): Get holiday dates by year and country, including regional calendars, local names and observed days. Look up supported countries, languages and subdivisions. - [ECB Currency Converter API](https://apyhub.com/callable-labs/service/ecb-currency-converter.md): Convert currencies easily with the latest or historical exchange rates. Calculate converted amounts and retrieve exchange rate details for payments, invoicing,… - [ECB Exchange Rates API](https://apyhub.com/callable-labs/service/ecb-exchange-rates.md): Access latest and historical exchange rates, daily currency rate time series, and supported currency data for financial applications and reporting. - [Text Analysis & Scoring API](https://apyhub.com/skycraft/service/text-analysis-scoring.md): Score text readability with Flesch, Fog, SMOG and more, plus style, skimmability and interestingness scores, word and sentence counts. JSON REST API.