Mod Organizer 2 Advanced Nexus API Extender

Mod Organizer 2 Advanced Nexus API Extender

One Nexus API key, stored safely, shared by every plugin that needs it.

What problem does this solve?

Mod Organizer 2 has its own Nexus login, but it will not hand that login to a plugin. So any plugin that wants to ask Nexus a question has to ask you for an API key — and then keep its own copy.

That leads to two annoyances:

• []You paste the same key over and over, once per plugin.[/]

  []Each plugin stores it in plain text inside ModOrganizer.ini, where anything that can read the file can read your key — including anyone you send an instance backup to.[/]

  This plugin fixes both. You enter your key once. It is stored in an encrypted file of its own, and plugins ask this plugin for it instead of asking you.

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  What you get

  • []Enter your key once. Tools → Nexus API Key. There is a Test button, so you find out immediately whether the key works.[/]

    []It is kept out of plain text. On Windows it is encrypted for your user account. A passphrase is available if you want it.[/]

    []You can see who asked. The window lists every plugin that has requested your key, how many times, and when — and you can deny any of them.[/]

    []It stops wasting your Nexus quota. Answers are cached and shared, so two plugins asking about the same mod cost one request between them instead of two.[/]

    []It tidies up after other plugins. If it finds a key sitting in plain text in ModOrganizer.ini, it offers to take it into the vault and blank the old copy.[/]

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    Install

    • []Download the archive.[/]

      []Extract it into your Mod Organizer 2 plugins folder, so that a folder called nexus_key_vault sits alongside the other plugins.[/]

      []Restart MO2.[/]

      []Go to Tools → Nexus API Key and paste your key.[/]

      You get a key from nexusmods.com → your profile → Site preferences → API keys.

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      Do I need this?

      Only if you use a plugin that asks for it. On its own this plugin does not change your mod list or your game — it is somewhere to put a credential, not a mod manager feature. If a plugin's description says it needs the Nexus API Extender, this is that.

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      Honest notes

      • []Your MO2 Nexus login is not touched. Downloads, endorsements and update checks keep working exactly as before. This is a separate key.[/]

        []This is a record, not a lock. Every plugin runs inside MO2 with your permissions, so a plugin determined to read your key would not have to ask politely. Denying one stops it using the published way in. Install plugins you trust.[/]

        []Running under Wine, Proton or CrossOver? Windows' encryption is not real there — its keys are derivable from public information. The plugin detects this, refuses to pretend, and falls back to its own scheme. Without a passphrase your key is obfuscated rather than encrypted, and the plugin tells you so in plain words. Set a passphrase if that matters to you.[/]

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        For plugin authors

        Three lines to get a working, cached, rate-limit-aware Nexus client:

        from nexus_key_vault import api

        nexus = api.client(organizer, "My Plugin")

        reqs = nexus.requirements(nexus.game_id("skyrimspecialedition"), 266)

        It speaks Nexus v1, v2 (GraphQL) and v3. It returns None rather than raising when there is no key, so your plugin degrades instead of breaking. The full interface is documented in the source repository and is stable at 1. 0. 0.

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        Source

        github.com/jturnley/MO2-Nexus-API-Extender — open source, and worth a look before you trust anything with a credential.

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        AI Content Disclosure

        This mod was developed in Claude Code using the Opus 5 model under experienced human guidance, then tested by automation and real humans.