Developer Docs - Apideck

# Apideck > Apideck is a unified API platform. Integrate once to connect to > 200+ services across CRM, Accounting, HRIS, ATS, File Storage, > E-commerce, Issue Tracking, and more. - [Markdown index](https://developers.apideck.com/md/index.json): Machine-readable index of all available markdown documentation - [OpenAPI specs](https://github.com/apideck-libraries/openapi-specs): Open-source OpenAPI specifications for all Apideck APIs - [API Skills](https://github.com/apideck-libraries/api-skills): Agent skills that teach LLMs to build with Apideck SDKs ## Docs - [Get Started](https://developers.apideck.com/get-started): Create an account, get API keys, and make your first API call - [Building with LLMs](https://developers.apideck.com/building-with-llms): API skills, IDE plugins, and plain-text docs - [API Explorer](https://developers.apideck.com/api-explorer): Interactive API explorer to test endpoints ## Unified APIs - [CRM API](https://developers.apideck.com/apis/crm/reference): Contacts, companies, opportunities, leads, pipelines - [Accounting API](https://developers.apideck.com/apis/accounting/reference): Invoices, bills, payments, ledger accounts, tax rates - [HRIS API](https://developers.apideck.com/apis/hris/reference): Employees, departments, time off, payroll - [ATS API](https://developers.apideck.com/apis/ats/reference): Jobs, applicants, hiring pipelines - [File Storage API](https://developers.apideck.com/apis/file-storage/reference): Files, folders, shared links - [E-commerce API](https://developers.apideck.com/apis/ecommerce/reference): Orders, products, customers - [Issue Tracking API](https://developers.apideck.com/apis/issue-tracking/reference): Issues, projects, comments ## Platform APIs - [Vault API Reference](https://developers.apideck.com/apis/vault/reference): Manage connections, sessions, and consumer authentication - [Webhooks API Reference](https://developers.apideck.com/apis/webhook/reference): Subscribe to events and receive real-tim