> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.merge.dev/merge-unified/knowledge-base/merge-api-basics/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.merge.dev/_mcp/server.

# Merge API basics

> Build once. Connect to every API, tool, and LLM. Ship products and agents to production without owning the integration stack.

## Docs

- [Authentication](https://docs.merge.dev/merge-unified/hris/merge-api-basics/authentication.md): How to authenticate: API key in the Authorization header (Bearer token) and Linked Account token in the X-Account-Token header. Includes SDK examples.
- [Pagination](https://docs.merge.dev/merge-unified/hris/merge-api-basics/pagination.md): Cursor-based pagination for list endpoints. Covers the next/previous cursor fields in responses and how to page through large result sets.
- [Merge SDKs](https://docs.merge.dev/merge-unified/hris/merge-api-basics/sdks.md): Official SDK installation and usage for all supported languages. Includes links to GitHub repos and package managers.
- [Rate limits](https://docs.merge.dev/merge-unified/hris/merge-api-basics/rate-limits.md): Rate limit tiers by plan (Launch, Professional, Enterprise) and per-Linked-Account request limits.
- [Sync frequency](https://docs.merge.dev/merge-unified/hris/merge-api-basics/sync-frequency.md): How often Merge syncs data from third-party integrations. Covers default intervals by plan tier (Launch, Professional, Enterprise) and per-category sync schedules.
- [Versioning](https://docs.merge.dev/merge-unified/hris/merge-api-basics/versioning.md): Merge's API versioning strategy and commitment to backward compatibility.