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

# Passthrough request

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

## Docs

- [Authenticated Passthrough Request](https://docs.merge.dev/merge-unified/supplemental-data/passthrough-request/overview.md): The /passthrough endpoint. Proxy authenticated requests to the underlying third-party API when you need data or operations not covered by Common Models.
- [Making a Passthrough Request](https://docs.merge.dev/merge-unified/supplemental-data/passthrough-request/passthrough-requests.md): How to send raw HTTP requests to a third-party integration's API through Merge, using the stored Linked Account credentials.
- [Async Passthrough](https://docs.merge.dev/merge-unified/supplemental-data/passthrough-request/async-passthrough-requests.md): How to send long-running Passthrough Requests asynchronously and poll for results, avoiding API timeouts.