Explore APIs
17,352 OpenAPI descriptions. Read the docs, compare revisions or generate a client.
Collections
New this month
6,279 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
17,352- FE14 operations1,165 revisionsFees@hubspot/crm-fees
CRM: create, read, update, search and archive fee records, plus batch operations and associations
- LI14 operations1,049 revisionsListings@hubspot/crm-listings
CRM: create, search, update and archive listing records in batches or one at a time
- CL3,778 operations1,936 revisionsCloudflare API@cloudflare/cloudflare
Networking, security and edge services: manage DNS, tunnels, Workers, WAF rules, Access policies and Radar threat data
- AP289 operations131 revisionsAPI Reference@sentry/sentry
Error monitoring: manage issues, events, releases, projects, teams, dashboards and monitors
- ME17 operations1,064 revisionsMeetings@hubspot/crm-meetings
CRM: schedule, search and update meeting records, link them to contacts and deals
- CR20 operations42 revisionsCredimi API@forkbombeu/credimi-api
Identity wallet testing: author wallet actions on devices, run schedules and workflows, manage API keys
- KO1,110 operations151 revisionsKonnect API - Go SDK@kong/konnect-api-go-sdk
Platform management: control planes, teams, users and roles, plus gateway configs, billing and event policies
- LE11 operations1,055 revisionsLeads@hubspot/crm-leads
CRM: create, search, update and archive sales prospects in single or batch calls
- PA17 operations1,291 revisionsPartner Clients@hubspot/crm-partner-clients
CRM: create, search, merge and archive partner client records, plus their associations
- SE17 operations1,135 revisionsServices@hubspot/crm-services
CRM records: create, read, search, batch-update and merge contacts, deals and other objects, with associations
- BL338 operations222 revisionsBloodHound API@specterops/bloodhound-api
Attack path analysis: query AD graph entities, relationships, collectors and findings
- SC332 operations508 revisionsSchematic API@schematichq/schematic-api
Feature flags, billing, and company plans: manage features, entitlements, coupons, credits, and checkout
- ST612 operations532 revisionsStripe API@stripe/spec3
Payments and billing: charge cards, manage customers, invoices, subscriptions and payouts
- TA11 operations1,084 revisionsTaxes@hubspot/crm-taxes
CRM: manage tax records with create, read, update, archive, batch and search operations
- LA545 operations316 revisionsLabel Studio API@humansignal/label-studio-api
Data labeling: manage projects, tasks, annotations, reviews, storage and ML backends
- VO112 operations90 revisionsVoiceBlender API@voiceblender/voiceblender-api
Voice calls: bridge SIP and WebRTC legs into rooms, manage trunks and registrations, stream events
- OR394 operations1,121 revisionsorq.ai API@orq-ai/orq-ai-api
GenAI platform: build agents, prompts and knowledge bases, run evals, and query logs and traces
- GR161 operations43 revisionsGrid API@stainless-api/grid-api
Payments: create customers, manage accounts, run KYC checks, send transfers and track transactions
- MO130 operations211 revisionsMollie API@mollie/mollie-api
Payments: accept payments, manage customers, subscriptions, refunds, payouts and settlements
- CO10 operations337 revisionsCommunication Preferences Subscriptions@hubspot/communication-preferences-subscriptions
Marketing: read and update contact subscription statuses, unsubscribe contacts, generate opt-out links
- JU259 operations74 revisionsJusto API@getjusto/justo-api
Restaurant ordering: menus, orders, reservations, deliveries, loyalty points and web store pages
- PR13 operations421 revisionsProperties@hubspot/crm-properties
CRM: define custom fields and field groups for contacts, companies and deals
- AC13 operations675 revisionsAccounts@rdstationmentoria/accounts
Account management: members, invitations, roles, workspaces and subscriptions
- AP942 operations172 revisionsAPI Reference@retraced/retraced
Supply chain compliance: manage audits, claims, CAPA actions, orders, styles and company documents
Showing 1 to 24 of 17,352
Load more