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- DA280 operations232 revisionsDagu@dagucloud/dagu
Workflow scheduling: define DAGs, run and monitor DAG executions, manage queues and backfills
- CO30 operations78 revisionsCore@stedi/core
EDI: generate X12 documents, track transactions and executions, retrieve inputs, outputs and faults
- OP174 operations670 revisionsOpenRouter API@openrouterteam/openrouter-api
LLM gateway: chat, embeddings, images and audio, plus keys, credits and usage analytics
- MA36 operations811 revisionsMarketing Marketing Events@hubspot/marketing-marketing-events
Marketing events: create and track events, record attendance, and link contact lists
- JU194 operations1,006 revisionsJunction API@tryvital/junction-api
Health data: user wearable timeseries, lab tests, testkit orders, and provider connections
- SC50 operations58 revisionsScorecard API@scorecard-ai/scorecard-api
Evaluation projects: manage test sets, test cases, runs, records, metrics and systems
- NO14 operations1,219 revisionsNotes@hubspot/crm-notes
CRM: log activity entries, search them, and link them to contacts, deals and companies
- OM194 operations97 revisionsOmnara API@omnara/omnara-api-2
AI agents: launch agents, handle approvals and questions, and stream their event timelines
- VE975 operations229 revisionsVerifyWise API@verifywise-ai/verifywise-api
AI governance: manage models, risks, policies, approvals, audits and AI app inventory
- BL338 operations223 revisionsBloodHound API@specterops/bloodhound-api
Attack path analysis: query AD graph entities, relationships, collectors and findings
- PR13 operations542 revisionsProperties@hubspot/crm-properties
CRM: define custom fields and field groups for contacts, companies and deals
- PR7 operations41 revisionsPropulsionAI API@propulsion-ai/propulsionai-api
AI models: run chat completions, manage datasets and upload files to knowledgebases
- PR11 operations1,198 revisionsProducts@hubspot/crm-products
CRM: manage product catalog records with create, read, update, archive, search and batch operations
- SQ291 operations717 revisionsSqle API Docs@actiontech/sqle-api-docs
SQL auditing: create audit tasks and scan plans, manage rules, whitelists and workflows
- PO30 operations795 revisionsPosts@hubspot/cms-posts
- AG94 operations83 revisionsAgentex API@scaleapi/agentex-api
Agent platform: manage agents, tasks, messages, spans, schedules and deployments, plus Slack and Linear ingress
- WI953 operations1,223 revisionsWindmill API@windmill/windmill-api
Workflow automation: run scripts and flows, schedule jobs, and wire up triggers for HTTP, Kafka, SQS and more
- IN11 operations1,260 revisionsInvoices@hubspot/crm-invoices
CRM: create, read, update, search and archive billing documents in batches
- DA235 operations688 revisionsDatadog API V1 Collection@datadog/datadog-api-v1-collection
Monitoring: manage dashboards, monitors, SLOs, events, hosts, downtimes and cloud integrations
- FE14 operations1,375 revisionsFees@hubspot/crm-fees
CRM: create, read, update, search and archive fee records, plus batch operations and associations
- OR12 operations1,248 revisionsOrders@hubspot/crm-orders
CRM: create, search, update, merge and archive sales order records in bulk
- PA6 operations1,473 revisionsPartner Services@hubspot/crm-partner-services
CRM: read, search, batch-update and edit HubSpot partner service records
- MO191 operations77 revisionsModern Treasury@modern-treasury/modern-treasury
Payments: move money with ledgers, payment orders, counterparties, invoices and bank account details
- PA66 operations723 revisionsPages@hubspot/cms-pages
Showing 1 to 24 of 17,359
Load more