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- BR162 operations185 revisionsBraintrust API@braintrustdata/braintrust-api
LLM evaluation: manage experiments, datasets, prompts, logs, and project access controls
- CR13 operations269 revisionsCRM Calling Extensions@hubspot/crm-calling-extensions
CRM: manage calling extension settings, channel connections, call recordings and inbound calls
- HE357 operations215 revisionsHephaestus API@hephaestus-build/hephaestus-api
Developer practice reviews, feedback, standings and LLM spend tracking for engineering workspaces
- CM33 operations628 revisionsCMS Media Bridge@hubspot/cms-media-bridge
Media tracking: record video plays and attention, and manage media object properties, schemas and oEmbed domains
- AU18 operations366 revisionsAutomation Actions V4@hubspot/automation-actions-v4
CRM workflows: create, update and delete custom actions, their functions and revisions
- AP295 operations392 revisionsAPI Reference@sentry/sentry
Error monitoring: manage projects, issues, releases, teams, dashboards and notebooks via API
- TE1,552 operations202 revisionsTelnyx API@team-telnyx/telnyx-api
Telephony: place calls, send SMS and MMS, manage phone numbers, SIP trunks and porting
- OP388 operations146 revisionsOpenAI API@omnistack-sh/openai-api
AI models: generate text and speech, transcribe audio, embed text, and manage files and batches
- MA36 operations880 revisionsMarketing Marketing Events@hubspot/marketing-marketing-events
Marketing events: create and track events, record attendance, and link contact lists
- KU295 operations941 revisionsKubeVirt API@kubevirt/kubevirt-api
Virtual machines on Kubernetes: manage VM backups, clones, and exports via the API
- OR36 operations916 revisionsOrders API@vtex/orders-api
Commerce: view orders, manage invoicing, shipping, payments, cancellations and modifications
- CL3,778 operations2,170 revisionsCloudflare API@cloudflare/cloudflare
Networking, security and edge services: manage DNS, tunnels, Workers, WAF rules, Access policies and Radar threat data
- AU10 operations271 revisionsAutomation Automation V4@hubspot/automation-automation-v4
HubSpot workflows: create, read, update and delete automation flows and their revisions
- LO61 operations965 revisionsLogistics API@vtex/logistics-api
Inventory, warehouses, pickup points, shipping rates and delivery windows for order fulfillment
- FL1,112 operations365 revisionsFlowHunt@flowhunt/flowhunt
Flows: build and run automations, chatbots, schedules and batch jobs, plus SEO and ad analytics
- NA25 operations13 revisionsNagaAI API@naga/nagaai-api
LLM gateway: one endpoint for chat, embeddings, images, audio and video models
- BO89 operations638 revisionsBoomi Data Integration API@rivery/boomi-data-integration-api
Data integration: create and run data flows, manage connections, dataframes, users and audit events
- EM214 operations22 revisionsemem@emem/emem
Shared agent memory: signed, content-addressed facts with provenance, readable without an account
- AP16 operations8 revisionsAPI de Boletín Claro@boletinclaro/api-de-boletin-claro
Dinero público: busca subvenciones, licitaciones y boletines oficiales por lenguaje natural y códigos CPV o CNAE
- HU379 operations624 revisionsHub API Endpoints@huggingface/hub-api-endpoints
Hub platform: manage models, datasets, Spaces, discussions, users and orgs via REST
- XT342 operations637 revisionsXTRF Home Portal API@xtrf/xtrf-home-portal-api
Localization projects: manage projects, quotes, clients, vendors, files and invoices through the XTRF Home Portal
- TE82 operations12 revisionsTempi API@meettempi/tempi-api
Scheduling: look up open times, book, reschedule and cancel meetings, and manage availability and teams
- IN214 operations55 revisionsinvinoveritas@babyblueviper/invinoveritas
Verification for agent actions: pre-action verdicts, signed proofs and a public ledger
- AT67 operations690 revisionsAtlas API@atlas/atlas-api
Customer support: manage conversations, customers, help center articles, CSAT surveys and session recordings
Showing 1 to 24 of 17,359
Load more