> ## Documentation Index
> Fetch the complete documentation index at: https://rapidreview.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Merv and Nisa

> Two RapidReview products, one account, one product switcher — and a deliberately thin bridge between them.

| Product  | Merv                                                       | Nisa                                                                   |
| -------- | ---------------------------------------------------------- | ---------------------------------------------------------------------- |
| What     | Gated, reviewable experiment workflows for research agents | A map of 500,000+ arXiv ML papers, a research agent over it, and a CLI |
| Where    | `rapidreview.io/merv` and your coding agent                | `rapidreview.io/nisa`, the `nisa` CLI, and your coding agent           |
| Talks to | The Merv brain over MCP                                    | The RapidReview API over HTTPS                                         |
| Account  | The same RapidReview sign-in                               | The same RapidReview sign-in                                           |

The web UIs share a product switcher (Nisa on the left, Merv on the right). They don't call each other.

## The bridge is an arXiv id

Nisa finds the paper; Merv records that the project uses it. Your agent runs `nisa search` / `nisa related`, takes the `arxiv_id`, and calls Merv's `litreview.cite` with it — Merv registers the paper in the project ledger, deduplicates it against other forms of the same paper, and links it to the experiments or claims that cite it. There's no automatic flow and no provenance field; the agent carries the id.

To make that natural, install the Nisa skill alongside the Merv plugin in the same coding agent — see [Install → Give your coding agent the skill](/docs/nisa/start/install#give-your-coding-agent-the-skill) and [Using Nisa with Merv](/docs/nisa/guides/with-merv).