Explore APIs
16,805 OpenAPI descriptions. Read the docs, compare revisions or generate a client.
Collections
New this month
7,382 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
16,805- EX11 operations6 revisionsExercise Services Client API@rage/exercise-services-client-api
Courses: list courses, track progress, submit exercise files and view grading
- MA411 operations66 revisionsMain Frontend API@rage/rage
Courses: manage course content, students, certificates, glossaries and exercise submissions
- AU158 operations111 revisionsAura Historia API Reference@aura-historia/aura-historia-api-reference
Antiques platform: search product listings, manage auctions, saved searches, watchlists and partner integrations
- CM36 operations24 revisionsCMS API@rage/cms-api
Course content: manage courses, chapters, pages, exams, email templates and code giveaways
- IM0 operations90 revisionsIMBoy REST API@imboy-pub/imboy-rest-api
- AU10 operations9 revisionsAuth API@rage/auth-api
Authentication: log users in and out, sign up, verify email, check permissions and delete accounts
- CO86 operations26 revisionsCourse Material API@rage/course-material-api
Education: manage courses, chapters, exercises, exams and glossary terms for course material
- WO23 operations77 revisionsWorkflow APIs@indeedeng/workflow-apis
Workflows: start, signal, stop and reset workflows, read state, data objects and search attributes
- GI858 operations344 revisionsGitHub v3 REST API@github/enterprise-server
Repositories, pull requests, Actions, code scanning and Dependabot alerts, checks, gists, and billing data
- OR381 operations815 revisionsorq.ai API@orq-ai/orq-ai-api
LLM platform: manage agents, knowledge bases, datasets, evals, prompts, traces and logs
- AC186 operations291 revisionsAccounting API@apideck-libraries/accounting-api
Accounting: manage invoices, bills, customers, suppliers, payments, refunds and ledger accounts
- SC125 operations77 revisionsScholia API@scholia-study/scholia-api
Books, articles and quotations: browse content, save quotes, manage reviews, users and billing
- SC8 operations149 revisionsSchemas@hubspot/crm-schemas
CRM: define, read, update and delete custom object types and their associations
- SE17 operations304 revisionsServices@hubspot/crm-services
CRM records: create, read, search, batch-update and merge contacts, deals and other objects, with associations
- SN71 operations180 revisionsSnapTrade@passiv/snaptrade
Brokerage: link user accounts, read positions and balances, and place or replace equity and options orders
- NE40 operations104 revisionsNEAR Protocol JSON RPC API@near/near-protocol-json-rpc-api-3
Blockchain: query accounts, contracts and blocks, and broadcast transactions to the NEAR network
- AD13 operations823 revisionsAdyen Payment API@adyen/paymentservice
Payments: authorise, capture, cancel and refund card and bank transfer payments, plus 3DS checks
- FI19 operations135 revisionsFiles Files@hubspot/files-files
Files: upload, import, search, download and delete files and folders, plus signed URLs
- NO14 operations281 revisionsNotes@hubspot/crm-notes
CRM: log activity entries, search them, and link them to contacts, deals and companies
- QU11 operations269 revisionsQuotes@hubspot/crm-quotes
CRM: create, read, search, update and archive sales proposals, singly or in batches
- ME165 operations67 revisionsMetronome@metronome/metronome
Usage billing: manage customers, contracts, invoices, credits, billable metrics and usage events
- VU155 operations93 revisionsVulnerability-Lookup API@vulnerability-lookup/vulnerability-lookup-api
Vulnerability records, CVE and EUVD entries, KEV, EPSS scores, CWE/CAPEC data, and sightings and comments
- WE10 operations220 revisionsWebhook API@apideck-libraries/webhook-api
Webhooks: manage event subscriptions with target URLs, list delivery logs and execute webhooks
- OR46 operations87 revisionsOrchestrator API@clouditor/orchestrator-api
Cloud compliance orchestration: register assessment tools, manage catalogs, controls, metrics and certificates
Showing 1 to 24 of 16,805
Load more