Find the right API
Use search when the broad directory stops being enough. Filter by category, auth, CORS, signup friction, and result freshness until the shortlist becomes obvious.
Start with category and auth when you know the integration shape. Use free, signup, and CORS flags when you are trying to remove setup friction.
Sort by verification or response time when the final call is about reliability, not just category fit.
351 results in the full search view. Start narrowing from the rail when the field is still too broad.
Browshot API
Generate website screenshots through screenshot/create, screenshot/html, and screenshot/host, then inspect browser and instance metadata.
Business Profile Performance API
Fetch Business Profile location metrics, daily time series, and monthly search keyword impressions.
Bybit API
Bybit API is the programmatic trading interface for Bybit crypto exchange, known for derivatives (perpetuals, options) and deep liquidity.
Calendar API
Google Calendar API lets apps create, read, and update calendar events programmatically — the go-to integration for scheduling apps.
Canada Holidays API
Canada Holidays API provides Canadian federal and provincial public holiday data — federal, provincial, and regional paid holidays.
CAPEsandbox
Malware execution and analysis.
Cat Facts
Daily cat facts.
Cataas
Cat as a service (cats pictures and gifs).
Catboy
Neko images, funny GIFs & more
Cats
Pictures of cats from Tumblr.
Cesium ion API
Cesium ion API is an open-source geospatial 3D platform — global high-precision 3D terrain + satellite imagery + building models, paired with CesiumJS engine for web 3D GIS apps.
Chainalysis API
Chainalysis API provides blockchain compliance and forensics data — address risk scoring, KYT (Know Your Transaction) screening, sanctions list matching, on-chain investigation.
Chrome Management API
Chrome Management API manages enterprise Chrome browsers and Chrome OS devices — policy deployment, extension control, user activity reports.
Chrome Policy API
Chrome Policy API deploys enterprise Chrome browser and ChromeOS device policies via API — supports 1000+ policy keys.
Clerk API
Clerk API is a modern user authentication service — sign up / sign in, organizations, multi-factor, SSO; optimized for React / Next.js / Remix.
clickup20
ClickUp API provides programmatic access to a full-stack project management platform — tasks, docs, goals, time tracking, automation, whiteboards.
Cloud Billing Budget API
Cloud Billing Budgets API programmatically creates and manages GCP budget alerts — set thresholds, configure notification channels, monitor across projects.
Cloud Channel API
Google Cloud Channel Services API is for Google channel partners — manage reseller customers, orders, entitlements, reports (Cloud Partner only).
Cloud Data Loss Prevention (DLP) API
Google Cloud DLP (Data Loss Prevention) API scans and de-identifies sensitive data — detects PII (national IDs, credit cards, emails) and performs masking, encryption, or format-preserving encryption.
Cloud Deployment Manager V2 API
Google Cloud Deployment Manager API deploys GCP resources via declarative templates — the native GCP IaC tool (CloudFormation-equivalent).
Cloud Document AI API
Google Document AI API processes documents with ML — OCR, form parsing, contract data extraction, invoice extraction — pre-trained + custom models.
Cloud Firestore API
Cloud Firestore API is Google Cloud managed NoSQL document database — real-time sync, offline support, strong consistency; a top choice for mobile / web app backends.
Cloud Functions API
Google Cloud Functions API deploys and manages serverless functions — write code, configure triggers, invoke, and monitor.
Cloud Natural Language API
Google Cloud Natural Language API provides text analysis — entity recognition, sentiment analysis, syntax parsing, content classification (multi-language).