Explore APIs
17,359 OpenAPI descriptions. Read the docs, compare revisions or generate a client.
Collections
New this month
6,287 APIs added in the last 30 days.
The biggest APIs
The APIs with the most operations.
Most active
Most new revisions in the last 90 days.
All APIs
17,359- HE58 operations18 revisionsHEVN Platform API@hevn-inc/hevn-api
Money movement, account verification and escrow for businesses and individuals, with USDC transfers across chains
- DU118 operations11 revisionsDuplicati API Documentation@duplicati/duplicati-api-documentation
Backup: manage backup jobs, connection strings, command-line runs and log data
- NE360 operations208 revisionsNetXMS API@netxms/netxms-api
Network monitoring: query alarms, incidents, objects and data collection values, and manage users and scripts
- AU176 operations126 revisionsAura Historia API Reference@aura-historia/aura-historia-api-reference
Antiques marketplace: browse listings and auctions, manage watchlists, search filters and partner listing sources
- CL3,778 operations2,027 revisionsCloudflare API@cloudflare/cloudflare
Networking, security and edge services: manage DNS, tunnels, Workers, WAF rules, Access policies and Radar threat data
- TR6 operations241 revisionsTransactional Single Send@hubspot/marketing-transactional-single-send
Email: send single transactional emails and manage SMTP API tokens and passwords
- HE353 operations210 revisionsHephaestus API@hephaestus-build/hephaestus-api
Developer practice reviews, feedback, standings and LLM spend tracking for engineering workspaces
- ST133 operations61 revisionsStrom API@eyevinn/strom-api
Pipelines: manage GStreamer flows, blocks, media, WebRTC streams and network ports
- FR111 operations36 revisionsFrikanalen Django API@frikanalen/frikanalen-django-api
Community TV broadcasting: manage videos, schedules, live sources, news bulletins and airtime grants
- AI56 operations84 revisionsAI Services Catalog API@ibm/ai-services-catalog-api
AI services: manage architectures, applications, models, datasources and workers
- SP173 operations244 revisionsspreed@nextcloud/spreed
Chat, calls, rooms, polls and recordings for WebRTC conferencing, with bans, bots and breakout rooms
- ST612 operations625 revisionsStripe API@stripe/spec3
Payments and billing: charge cards, manage customers, invoices, subscriptions and payouts
- SP7 operations91 revisionsspreed-backend-sipbridge@nextcloud/spreed-backend-sipbridge
Spreed conferencing: look up rooms, verify SIP dial-in and dial-out numbers, create guests
- CA14 operations1,198 revisionsCarts@hubspot/crm-carts
CRM: create, search, update and archive shopping cart records in HubSpot
- AP17 operations1,463 revisionsAppointments@hubspot/crm-appointments
CRM: manage appointment records, their associations, batch operations and search
- MA28 operations811 revisionsMarketing Campaigns Public Api@hubspot/marketing-campaigns-public-api
Marketing: create and clone campaigns, track budgets, spend, assets and revenue reports
- KU295 operations783 revisionsKubeVirt API@kubevirt/kubevirt-api
Virtual machines on Kubernetes: manage VM backups, clones, and exports via the API
- LI14 operations1,193 revisionsListings@hubspot/crm-listings
CRM: create, search, update and archive listing records in batches or one at a time
- DI17 operations1,217 revisionsDiscounts@hubspot/crm-discounts
CRM: manage discount records, search, batch updates, merges and associations with deals
- QU11 operations1,225 revisionsQuotes@hubspot/crm-quotes
CRM: create, read, search, update and archive sales proposals, singly or in batches
- CR17 operations1,185 revisionsCRM Postal Mail@hubspot/crm-postal-mail
CRM: create, search, update and archive postal mail records and their associations
- AP289 operations250 revisionsAPI Reference@sentry/sentry
Error monitoring: manage issues, events, releases, projects, teams, monitors and alerts
- SP9 operations99 revisionsspreed-federation@nextcloud/spreed-federation
Chat and video rooms: list, accept or decline federation invites, join or leave rooms, fetch user avatars
- OS170 operations752 revisionsOSRD Editoast@openrailassociation/osrd-editoast
Railway infrastructure: manage infras, rolling stock, timetables, studies and train pathfinding
Showing 1 to 24 of 17,359
Load more