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- AC13 operations708 revisionsAccounts@rdstationmentoria/accounts
Account management: members, invitations, roles, workspaces and subscriptions
- AG23 operations701 revisionsAgents@rdstationmentoria/agents
CRM: manage AI assistants, leads, custom fields, conversations and channels
- MA34 operations2 revisionsMailforge API@mailforge/mailforge-api
Email mailboxes and domains: buy, forward and manage DNS, auto-renewal and API keys
- GM50 operations2 revisionsGMass API@gmass/gmass-api
Email campaigns: send, draft, pause and report on mail merges, lists and unsubscribes
- EX110 operations2 revisionsExternal API@databar/external-api
Data enrichment: build tables and workbooks, run waterfalls and enrichments, manage flows and connectors
- DO81 operations10 revisionsDOS AI Public API@dosai/dos-ai-public-api
AI assistants for WhatsApp, Instagram and Telegram: manage projects, leads, bookings, conversations and knowledge
- OR76 operations3 revisionsOrigami Agent API@origami/origami-agent-api
AI agents, workspaces, tables and outreach campaigns: drive workers, read rows, manage sequences and senders
- PA30 operations4 revisionsParky API@parkypass/parky-api
Theme parks: live waits, crowd forecasts, ride outages and resort tickets for ten Disney and Universal parks
- TA10 operations3 revisionsTavily Search and Extract API@tavily/tavily-search-and-extract-api
Web search, extraction, crawling, mapping and research for LLM agents
- AP66 operations3 revisionsAPI CRM Datacrazy@datacrazy/api-crm-datacrazy
CRM: manage leads, businesses, products, tags, lists, activities and conversations
- FO225 operations3 revisionsFOX NF-e API@foxnfe/fox-nf-e-api
Fiscal documents for Brazil: issue NF-e, NFC-e, NFS-e, CT-e and MDF-e, and manage certificates and companies
- JU219 operations4 revisionsJustEmails API@justemails/justemails-api
Email hosting and transactional sending: manage domains, mailboxes, inbox, sends, webhooks and suppressions
- CO87 operations8 revisionscontentmaschine.ai API@contentmaschine/contentmaschine-ai-api
AI content generation: create images, videos, audio, text and documents via API
- FR1,514 operations6 revisionsFreshlearn API@freshlearn/freshlearn-api
Online course platform: create courses, manage members, payments, subscriptions, assessments and blogs
- MC246 operations152 revisionsMCPJam API@mcpjam/mcpjam-api
Developer tools: validate, inspect, export and call MCP servers in MCPJam projects, run evals
- PA66 operations800 revisionsPages@hubspot/cms-pages
- CA208 operations874 revisionsCatalog API@vtex/catalog-api
Commerce catalog: manage products, SKUs, categories, brands, specifications and attachments
- PR13 operations577 revisionsProperties@hubspot/crm-properties
CRM: define custom fields and field groups for contacts, companies and deals
- CO13 operations371 revisionsConversations Custom Channels@hubspot/conversations-custom-channels
Custom channels: create and manage messaging channels, their accounts, and published messages
- AP268 operations201 revisionsAPI Explorer@instantly/api-explorer
Cold email outreach: manage campaigns, sender accounts, leads, emails and deliverability tests
- BA83 operations14 revisionsBannerbear V5 API@bannerbear/bannerbear-v5-api
Image and video generation: templated images, animations, background removal and asset management
- WE398 operations42 revisionsWever Labs paid API@weverlabs/wever-labs-agent-api
Agent governance: check approvals, budgets, identities and audit records for AI agents
- EL637 operations29 revisionsElectric Air Autoquote API@electricair/electric-air-autoquote-api
Solar sales CRM: manage deals, quotes, leads, customers, incentives and installation files
- WI953 operations1,303 revisionsWindmill API@windmill/windmill-api
Workflow automation: run scripts and flows, schedule jobs, and wire up triggers for HTTP, Kafka, SQS and more
Showing 1 to 24 of 17,359
Load more