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- KA136 operations7 revisionsKatla API@katla/katla-api
Cookie compliance scanning: audit site cookies, classify them, run consent checks and manage teams
- WA176 operations103 revisionsWarrant@teetra/warrant
Identity and checkout: enroll users, verify challenges, run payment sessions and webhooks
- ZE1,271 operations260 revisionsZernio API@zernio/zernio-api
Social, messaging and commerce: publish posts, run ads, manage inboxes, SMS, WhatsApp and blogs
- AS205 operations18 revisionsAstraNL Public API (positive allowlist)@astranl/astranl-public-api-positive-allowlist
Coordination: route intents, claim cases, dispatch tasks, register agents and robot operators, and browse open tenders
- AG109 operations74 revisionsAgentDrives API@agentdrives/agentdrives-api
Product directory: search tools, follow level changes, order drives, and manage API keys and claims
- AP268 operations166 revisionsAPI Explorer@instantly/api-explorer
Cold email outreach: manage campaigns, sender accounts, leads, emails and deliverability tests
- ES211 operations482 revisionsES API@equipmentshare/es-api
Equipment rental: manage orders, deliveries, assets, credit applications and rental KPIs
- 21463 operations53 revisions21RISK API@21risk/21risk-api
GRC platform: query boards, findings, claims, compliance snapshots, automations and API keys
- KA90 operations8 revisionsKan API@kan/kan-api
Kanban boards: manage cards, lists, labels, members and Trello/GitHub imports
- PO2,703 operations188 revisionsPostHog API@posthog/posthog-api
Product analytics: track events, run experiments, manage feature flags, dashboards and session data
- GL395 operations92 revisionsgleap-server@gleap/gleap-server
Customer engagement: in-app surveys, tickets, chat, help center articles, banners and product tours
- LL30 operations36 revisionsLLM Gateway API@llmgateway/llmgateway-api
AI models: chat, embeddings, images, audio, video, moderation and batch jobs via one key
- EL26 operations4 revisionsElkqr API@elkqr/elkqr-api
QR code generation and management: create, update and track QR codes, plus a help center and contact form
- FA71 operations7 revisionsfaktry Media API@faktry/faktry-media-api
Media AI: generate and edit images, video, audio, 3D models and PDFs
- AN389 operations4 revisionsAnyreach API@anyreach/anyreach-api
Voice AI agents, campaigns, workflows, knowledge bases and phone numbers: build and run conversational automation
- JO98 operations14 revisionsJob Copilot API@qarera/job-copilot-api
Job search: browse and suggest jobs, track applications, manage resumes and job alerts
- EX1,375 operations99 revisionsExcellence Learning@excellence-ai/excellence-learning
Courses and exercises for schools: manage classes, assignments, teacher exams, student progress and custom courses
- SU192 operations42 revisionsSuperLink API@flower/superlink-api
Federated learning platform APIs: manage fleets, agents, tasks, organizations, licenses, billing and secret keys
- ME98 operations99 revisionsMergify API@mergify/mergify-api
Merge queue, CI test insights and configuration tooling for code merges on GitHub repositories
- AH178 operations30 revisionsAhrefs API@ahrefs/ahrefs-api
SEO and AI-search data: backlinks, keywords, rank tracking, site audits and brand visibility
- NA166 operations86 revisionsNatural API@natural/natural-api
Payments for AI agents: accept card payments, manage customers, refunds, chargebacks and transfers
- LA138 operations8 revisionsLand Registry API@findmydocument/land-registry-api
Land registry: manage orders, products, tasks, employees, customer emails and order tracking
- SC8 operations8 revisionsScribo Invoice API@causaprima/scribo-invoice-api
E-invoicing: generate XRechnung, ZUGFeRD or PDF invoices for Germany and the US
- OD193 operations693 revisionsOdd-e Open API@nerds-odd-e/odd-e-open-api
Notebooks, notes, recalls and relations: manage notes, folders, subscriptions and assistant OAuth connections
Showing 1 to 24 of 17,352
Load more