Explore APIs
16,817 OpenAPI descriptions. Read the docs, compare revisions or generate a client.
Collections
New this month
7,777 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
17,200- ME708 operations237 revisionsMetricool API@metricool/metricool-api
Social media analytics, scheduling and reporting: publish posts, track account metrics and manage brands and reports
- VE30 operations18 revisionsVenice.ai API@venice/venice-ai-api
AI: generate speech, images and video, chat completions, embeddings, and decisions
- RF222 operations2 revisionsrfpai api-go@hillstar/rfpai-api-go
RFP management: projects, vendor bids, evaluations, rubrics, scorecards, and workspace members
- AP268 operations70 revisionsAPI Explorer@instantly/api-explorer
Cold email outreach: manage campaigns, sender accounts, leads, emails and deliverability tests
- PA353 operations73 revisionsPangolin Integration API@pangolin/pangolin-integration-api
Secure access: publish private and public resources, route sites, manage users, roles and AI providers
- AT67 operations548 revisionsAtlas API@atlas/atlas-api
Customer support: manage conversations, customers, help center articles, CSAT surveys and session recordings
- SV144 operations49 revisionsSvix API@svix/svix-api
Webhooks: send events to endpoints, manage apps, retries, event types and integrations
- AK1,899 operations62 revisionsAkeda ERP Client API@akeda/akeda-erp-client-api
ERP: tasks, calendar, chat, contacts, products, documents, stock and finance records
- VO137 operations22 revisionsvolai REST API@volai/volai-rest-api
Phone numbers, calls and SMS, plus AI voice agents for placing and receiving calls
- EL515 operations128 revisionsElevenLabs API Documentation@elevenlabs/elevenlabs-api-documentation
Text-to-speech and voice AI: generate speech, transcribe audio, change voices, and manage voices and music
- AS124 operations36 revisionsASPERN@aspern/aspern
Risk and on-chain record checks for DeFi vaults, operators and agent commerce, from measured chain data
- EX35 operations40 revisionsExperiential Labs Platform API@experientiallabs/experiential-labs-platform-api
AI model gateway: chat, embeddings, images, audio, video, batches and files via OpenAI- and Anthropic-style endpoints
- AF59 operations12 revisionsAfterLaunch public API@afterlaunch/afterlaunch-public-api
Growth analytics: ranked growth moves, drafted outputs, AI visibility, SEO audits and competitor stats
- RU541 operations29 revisionsRun402 API@run402/run402-api
Infrastructure for AI agents: Postgres databases, auth, file storage, site hosting and functions
- LI85 operations14 revisionsListings API@listingsapi/listings-api
Location listings sync, reviews, posts and local search analytics across Google, Facebook and Bing
- CL16 operations4 revisionsCloud Studio IoT Data Extraction API@cloudstudioiot/cloud-studio-iot-data-extraction-api
IoT platform: extract alarms, sensor readings, alert rules, geozones and device maps incrementally
- FU5 operations2 revisionsFundz Agent Data API@fundz/fundz-agent-data-api
Funding and SEC 8-K signals: rank target companies, track watchlists, forecast next moves
- KE35 operations1 revisionKetryx API@ketryx/ketryx-api
Medical device compliance: manage projects, items, documents, versions, builds and training records
- JU111 operations1 revisionJustiFi API Documentation@justifi/justifi-api-documentation
Payments: charge cards, track refunds, disputes, payouts and sub-account balances
- KE317 operations1 revisionKeboola Storage API@keboola/keboola-storage-api
Data storage: import and export CSV tables, manage buckets, files and workspaces
- EN355 operations1 revisionEntitlements Agent (PDP)@frontegg/entitlements-agent-pdp
Entitlements, plans, feature flags, users, roles and SSO for multi-tenant apps via Frontegg
- IN56 operations1 revisionIntelligems External API v25-10-beta@intelligems/intelligems-external-api-v25-10-beta
Experiments: manage A/B tests, personalization, checkout blocks and store analytics
- JA21 operations1 revisionJamBase Concert Data API@jambase/jambase-concert-data-api
Concerts and festivals: search events, venues, artists and streams, plus live stream listings
- FE62 operations21 revisionsFermyon Cloud API@fermyon/fermyon-cloud-api
Serverless hosting: deploy apps, manage key-value stores, SQL databases, custom domains and revisions
Showing 1 to 24 of 17,200
Load more