Lithtrix

Name: Lithtrix
Author: lithtrix

by lithtrixversion 0.20.8i★ 1 (Stars for the whole repo)iRuns on your computer

Registry nameio.github.lithtrix/lithtrix

How to install

What it does

Identity, memory, trust, and swarm MCP tools for AI agents. Free MIRC + free floors at lithtrix.ai.

Connects Runs on your computer
Account or key Needs LITHTRIX_API_KEY
Category Search & AI memory

Install

Pick the AI app you use, then copy the settings.

Passed 2/3 checks · Runs on your computer · ✓ Commands checked Nov 14, 2026

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

You need a Lithtrix key (create it on the maker’s site) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Let AI install it

Copy this message into a Claude chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server Lithtrix for Claude on this computer, in this order: 1) Check Node.js with node -v. If it is missing, tell me to install it from https://nodejs.org/en/download; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "mcpServers": { "lithtrix": { "command": "npx", "args": [ "-y", "lithtrix-mcp" ], "env": { "LITHTRIX_API_KEY": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For LITHTRIX_API_KEY, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the Lithtrix tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install Node.js (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
node -v
- A version number such as v26.13.1 = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: Open the official download page, pick the LTS version and the click-through installer: .pkg on Mac · .msi on Windows. Double-click and follow it to the end. No curl command needed
Open the Node.js download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: node -v
Install once; it works for everything that needs Node.js
Done
Sign up and create a Lithtrix key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "lithtrix": {
      "command": "npx",
      "args": [
        "-y",
        "lithtrix-mcp"
      ],
      "env": {
        "LITHTRIX_API_KEY": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use Lithtrix and tell me what you can do for me, then show me one thing
✓ If Claude says it is using Lithtrix or shows a Lithtrix tool in the answer, you are connected

3 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

LITHTRIX_PASSPORT_MASTER_SEED Optional. UTF-8 passphrase for lithtrix_passport_derive and lithtrix_delegate signing — never sent to the Lithtrix API.
LITHTRIX_PASSPORT_PRIVATE_KEY Optional. PKCS#8 PEM Ed25519 private key for lithtrix_delegate signing (client-side only).
LITHTRIX_API_URL Optional. Override the Lithtrix API base URL. Defaults to https://api.lithtrix.ai.

Descriptions are as written by the maker.

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect Lithtrix yet

Lithtrix runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect Lithtrix

Steps for Claude →You need a Lithtrix key (create it on the maker’s site) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a Lithtrix key (create it on the maker’s site) · Install Node.js on your computer first (one time)
Steps for Cursor →You need a Lithtrix key (create it on the maker’s site) · Install Node.js on your computer first (one time)
Steps for VS Code →You need a Lithtrix key (create it on the maker’s site) · Install Node.js on your computer first (one time)

B · Others in Search & AI memory that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Context7✓ ChatGPT
OpenSEO✓ ChatGPT
AIHOT✓ ChatGPT

Works with Claude Code, with some setup first

You need a Lithtrix key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Let AI install it

Copy this message into a Claude Code chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server Lithtrix for Claude Code on this computer, in this order: 1) Check Node.js with node -v. If it is missing, tell me to install it from https://nodejs.org/en/download; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): claude mcp add --scope user lithtrix --env LITHTRIX_API_KEY=your-value -- npx -y lithtrix-mcp 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For LITHTRIX_API_KEY, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the Lithtrix tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install Node.js (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
node -v
- A version number such as v26.13.1 = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: Open the official download page, pick the LTS version and the click-through installer: .pkg on Mac · .msi on Windows. Double-click and follow it to the end. No curl command needed
Open the Node.js download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: node -v
Install once; it works for everything that needs Node.js
Done
Sign up and create a Lithtrix key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
4
Paste this command and press Enter
```
claude mcp add --scope user lithtrix --env LITHTRIX_API_KEY=your-value -- npx -y lithtrix-mcp
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see Lithtrix listed as connected
Done
Try it
Use Lithtrix and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using Lithtrix or shows a Lithtrix tool in the answer, you are connected

3 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

LITHTRIX_PASSPORT_MASTER_SEED Optional. UTF-8 passphrase for lithtrix_passport_derive and lithtrix_delegate signing — never sent to the Lithtrix API.
LITHTRIX_PASSPORT_PRIVATE_KEY Optional. PKCS#8 PEM Ed25519 private key for lithtrix_delegate signing (client-side only).
LITHTRIX_API_URL Optional. Override the Lithtrix API base URL. Defaults to https://api.lithtrix.ai.

Descriptions are as written by the maker.

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

You need a Lithtrix key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Let AI install it

Copy this message into a Cursor chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server Lithtrix for Cursor on this computer, in this order: 1) Check Node.js with node -v. If it is missing, tell me to install it from https://nodejs.org/en/download; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "mcpServers": { "lithtrix": { "command": "npx", "args": [ "-y", "lithtrix-mcp" ], "env": { "LITHTRIX_API_KEY": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For LITHTRIX_API_KEY, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the Lithtrix tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install Node.js (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
node -v
- A version number such as v26.13.1 = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: Open the official download page, pick the LTS version and the click-through installer: .pkg on Mac · .msi on Windows. Double-click and follow it to the end. No curl command needed
Open the Node.js download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: node -v
Install once; it works for everything that needs Node.js
Done
Sign up and create a Lithtrix key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the Lithtrix settings, LITHTRIX_API_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use Lithtrix and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using Lithtrix or shows a Lithtrix tool in the answer, you are connected

3 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

LITHTRIX_PASSPORT_MASTER_SEED Optional. UTF-8 passphrase for lithtrix_passport_derive and lithtrix_delegate signing — never sent to the Lithtrix API.
LITHTRIX_PASSPORT_PRIVATE_KEY Optional. PKCS#8 PEM Ed25519 private key for lithtrix_delegate signing (client-side only).
LITHTRIX_API_URL Optional. Override the Lithtrix API base URL. Defaults to https://api.lithtrix.ai.

Descriptions are as written by the maker.

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

You need a Lithtrix key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Let AI install it

Copy this message into a VS Code chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server Lithtrix for VS Code on this computer, in this order: 1) Check Node.js with node -v. If it is missing, tell me to install it from https://nodejs.org/en/download; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "servers": { "lithtrix": { "type": "stdio", "command": "npx", "args": [ "-y", "lithtrix-mcp" ], "env": { "LITHTRIX_API_KEY": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For LITHTRIX_API_KEY, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the Lithtrix tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install Node.js (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
node -v
- A version number such as v26.13.1 = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: Open the official download page, pick the LTS version and the click-through installer: .pkg on Mac · .msi on Windows. Double-click and follow it to the end. No curl command needed
Open the Node.js download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: node -v
Install once; it works for everything that needs Node.js
Done
Sign up and create a Lithtrix key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the Lithtrix settings, LITHTRIX_API_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use Lithtrix and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using Lithtrix or shows a Lithtrix tool in the answer, you are connected

3 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

LITHTRIX_PASSPORT_MASTER_SEED Optional. UTF-8 passphrase for lithtrix_passport_derive and lithtrix_delegate signing — never sent to the Lithtrix API.
LITHTRIX_PASSPORT_PRIVATE_KEY Optional. PKCS#8 PEM Ed25519 private key for lithtrix_delegate signing (client-side only).
LITHTRIX_API_URL Optional. Override the Lithtrix API base URL. Defaults to https://api.lithtrix.ai.

Descriptions are as written by the maker.

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use Lithtrix💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add --scope user lithtrix --env LITHTRIX_API_KEY=your-value -- npx -y lithtrix-mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "lithtrix": {
      "command": "npx",
      "args": [
        "-y",
        "lithtrix-mcp"
      ],
      "env": {
        "LITHTRIX_API_KEY": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "lithtrix": {
      "command": "npx",
      "args": [
        "-y",
        "lithtrix-mcp"
      ],
      "env": {
        "LITHTRIX_API_KEY": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "lithtrix": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "lithtrix-mcp"
      ],
      "env": {
        "LITHTRIX_API_KEY": "your-value"
      }
    }
  }
}

Values you fill in

LITHTRIX_API_KEY secret required env
Your Lithtrix API key (ltx_...). Register free at https://lithtrix.ai/v1/register — MIRC free forever, rolling-30 free floors, no card required. Or use the lithtrix_register tool.
LITHTRIX_PASSPORT_MASTER_SEED secret env
Optional. UTF-8 passphrase for lithtrix_passport_derive and lithtrix_delegate signing — never sent to the Lithtrix API.
LITHTRIX_PASSPORT_PRIVATE_KEY secret env
Optional. PKCS#8 PEM Ed25519 private key for lithtrix_delegate signing (client-side only).
LITHTRIX_API_URL env
Optional. Override the Lithtrix API base URL. Defaults to https://api.lithtrix.ai.

Descriptions are as written by the maker.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

At a glance

GitHub stars i: 1 (Stars for the whole repo)
This repo holds several MCP listings; its stars count once in rankings
Downloads per weeki: 162/wk
Licence i: No licence stated
Connection: Runs on your computer
Transport: stdio
Latest versioni: 0.20.8
Categoryi: Search & AI memory
Published to registryi: Sep 20, 2026
Code last changedi: Jun 20, 2026
Maker: lithtrix
Packages: npm: lithtrix-mcp
Repo: lithtrix/lithtrix-mcp
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 15, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account lithtrix, which owns the repo
✓ Pass
Still maintained
Code last changed 5 months ago
✕ Fail
Has a licence
No licence file found in the repo
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Published vulnerabilities (OSV.dev)

Not checked yet

What we check → · JSON

Makers: ask for a re-check or report wrong info

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Search & AI memoryi

More stars than 0% of the other 6147 servers in this category
Published to the registry more recently than 40% of the other 6147 servers in this category
Basic checks equal to or better than 50% of the other 6147 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Lithtrix safe?

It passed 2 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: LITHTRIX_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 5 months ago, and the latest version (0.20.8) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: OpenSEO, Exa, Mockserver, Microsoft Learn MCP, Docs

Similar alternatives

Same category, other makers, commands already checked. Official ones first, then by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

OpenSEO

Keyword research, site audits, rank tracking and AI visibility for your AI agent.

by every-appWidely used★ 27.7KUpdated yesterday

Runs in the cloud✓ everyapp.com

How to connect

Exa

Connect AI agents to Exa for web search, content fetching, and multi-step research.

by exa-labsWidely used★ 5.2KUpdated 2 months ago

Runs in the cloud✓ service owner · exa.aiTried by the PopNx team

How to connect

Mockserver

Mock, record/replay, verify and chaos-test any HTTP, REST, gRPC or LLM dependency over MCP.

by mock-serverGrowing★ 5KUpdated 19 days ago

Runs on your computer✓ service owner · mock-server.com

Install

Microsoft Learn MCP

Official Microsoft Learn MCP Server – real-time, trusted docs & code samples for AI and LLMs.

by MicrosoftDocsWidely used★ 2KUpdated 12 months ago

Runs in the cloud✓ service owner · microsoft.comTried by the PopNx team

How to connect

Docs

Search and read Empryo's documentation. Read-only, no auth, no local access.

by proxysoulGrowing★ 1.6KUpdated 2 months ago

Runs in the cloud✓ empryo.com

How to connect

OpenSEO — Runs in the cloud, nothing to install · No key needed
Exa — Runs in the cloud, nothing to install · No key needed · In Claude’s directory
Mockserver — Installs on your computer · No key needed
Microsoft Learn MCP — Runs in the cloud, nothing to install · No key needed · In Claude’s directory
Docs — Runs in the cloud, nothing to install · No key needed

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

lithtrix-mcp

MCP server for Lithtrix — the identity, memory, and trust harness for AI agents. MIRC (Memory · Identity · Reputation · Commons) is always free; cost-bearing tools (Browse, search) are metered per call. Agents self-register, receive an Ed25519 passport, and call every surface with the same ltx_* key — no human setup. Ships `lithtrix.claude.md` for Claude / Cursor project context (same repo path as this package).

Aligned with API discovery `version` `4.4.0` (GET https://api.lithtrix.ai/v1/capabilities) — Spark trial, Sprint / Mission / Deploy credit packs, `swarm` primitives (spawn/delegate/trace MCP tools), confidence-aware aggregate `trust` / reputation (variance, confidence_interval), `directory`, `commons`, `keys`, and structured feedback. Package version `0.20.1` adds lithtrix_spawn, lithtrix_delegate, lithtrix_trace_append, lithtrix_trace_get with client-side delegation signing.

MCP tool JSON: canonical **GET https://lithtrix.ai/mcp/v1/lithtrix-*.json. Legacy GET https://lithtrix.ai/mcp/lithtrix-*.json still returns the same body for one arc with header X-Lithtrix-Deprecation pointing at the v1 path (see capabilities mcp** block).

1. Installation

npx -y lithtrix-mcp

Or for global install:

npm install -g lithtrix-mcp

2. Claude Desktop Configuration

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

"mcpServers": { "lithtrix": { "command": "npx", "args": ["-y", "lithtrix-mcp"], "env": { "LITHTRIX_API_KEY": "ltx_your_key_here" } } } }

3. Getting an API Key

Use the lithtrix_register tool first — no API key needed. Or call the API directly:

curl -X POST https://lithtrix.ai/v1/register \

-H "Content-Type: application/json" \ -d '{"agent_name": "my-agent", "owner_identifier": "you@example.com", "agree_to_terms": true}'

Optional: include "referral_agent": " " — the same UUID that agent shows as referral_code on GET /v1/me (stored for signup attribution; trial search is credit-gated, not a +call bonus). New agents get $5 in trial credits (no card).

The returned api_key is shown once. Store it securely.

4. Tools Exposed

`lithtrix_search` — web search with credibility scoring. Requires LITHTRIX_API_KEY. Responses include _lithtrix.search_id for correlating lithtrix_feedback.
`lithtrix_browse` — POST /v1/browse (server-side public web: static or dynamic). Requires LITHTRIX_API_KEY. *Pay to be fully autonomous* — see GET /mcp/v1/lithtrix-browse.json.
`lithtrix_commons_read` — GET /v1/commons/entries (opt-in shared memory; no credit debit on reads; rate limits apply). Requires LITHTRIX_API_KEY. Schema: GET /mcp/v1/lithtrix-commons-read.json.
`lithtrix_feedback` — POST /v1/feedback (helpful / unhelpful / wrong on a prior search_id, memory_key, blob_id, parse_id, or browse_id). Requires LITHTRIX_API_KEY. Optional note (≤500 chars); do not send secrets or PII.
`lithtrix_register` — register a new agent and get an API key. No auth required. `agree_to_terms` must be `true` (Gentle-Agent Agreement). $5 trial credits on signup (no card). Optional referral_agent (referrer UUID).
`lithtrix_memory_set` — PUT /v1/memory/{key}. Requires LITHTRIX_API_KEY.
`lithtrix_memory_get` — GET /v1/memory/{key}. Requires LITHTRIX_API_KEY.
`lithtrix_memory_search` — GET /v1/memory/search (semantic). Requires LITHTRIX_API_KEY and server-side vector + embedding config.
`lithtrix_memory_context` — GET /v1/memory/context (importance + recency). Requires LITHTRIX_API_KEY.
`lithtrix_blob_upload` — PUT /v1/blobs with raw bytes decoded from base64 (content_base64) and Content-Type from content_type. Optional filename query. Use direct HTTP for very large files. Requires LITHTRIX_API_KEY.
`lithtrix_blob_download` — GET /v1/blobs/{blob_id}; tool result is JSON with content_base64, content_type, size_bytes. Requires LITHTRIX_API_KEY.
`lithtrix_blob_list` — GET /v1/blobs (optional page, per_page). Requires LITHTRIX_API_KEY.
`lithtrix_blob_meta` — GET /v1/blobs/{blob_id}/meta. Requires LITHTRIX_API_KEY.
`lithtrix_blob_delete` — DELETE /v1/blobs/{blob_id} (soft-delete). Requires LITHTRIX_API_KEY.
`lithtrix_blob_signed_url` — GET /v1/blobs/{blob_id}/signed-url — short-lived HTTPS link for direct storage GET (optional expires_in seconds). Requires LITHTRIX_API_KEY. Treat URLs as read tokens.
`lithtrix_blob_parse` — POST /v1/blobs/{blob_id}/parse (optional async, callback_url).
`lithtrix_blob_parse_status` — GET /v1/blobs/{blob_id}/parse/{parse_id}.
`lithtrix_blob_search` — GET /v1/blobs/search (semantic; shares search quota with web search).
`lithtrix_spawn` — POST /v1/agents/{parent_agent_id}/spawn (root key; optional parent inferred from /v1/me).
`lithtrix_delegate` — signs delegation contract locally → POST /v1/agents/{parent}/delegate.
`lithtrix_trace_append` — POST /v1/tasks/{task_id}/trace/events.
`lithtrix_trace_get` — GET /v1/tasks/{task_id}/trace.

Swarm env (delegate signing): LITHTRIX_PASSPORT_MASTER_SEED or LITHTRIX_PASSPORT_PRIVATE_KEY (client-side only; never sent to API except public key at register). (no auth, canonical v1 paths): GET https://lithtrix.ai/mcp/v1/lithtrix-browse.json, GET https://lithtrix.ai/mcp/v1/lithtrix-commons-read.json, GET https://lithtrix.ai/mcp/v1/lithtrix-blob-upload.json (and -download, -list, -meta, -delete, -signed-url, lithtrix-blob-parse.json, lithtrix-blob-parse-status.json, lithtrix-blob-search.json, passport and trust tools). Legacy /mcp/lithtrix-*.json URLs alias v1 with a deprecation header until after Arc 24.

5. Credential Vault Compatibility

The API key is read exclusively from process.env.LITHTRIX_API_KEY. It is never hardcoded. Pass it via:

Your platform's credential store (e.g. Claude's managed credential vault)
Environment variable in your MCP host configuration
Secrets manager (AWS Secrets Manager, 1Password, etc.)

Never paste your API key into the tool definition or source code.

6. Environment Variables

Variable	Required	Default	Description
`LITHTRIX_API_KEY`	Yes (for search)	—	Your `ltx_` API key
`LITHTRIX_PASSPORT_MASTER_SEED`	For delegate	—	UTF-8 seed for `lithtrix_passport_derive` / delegate signing
`LITHTRIX_PASSPORT_PRIVATE_KEY`	For delegate	—	PKCS#8 PEM Ed25519 private key (alternative to seed)
`LITHTRIX_API_URL`	No	`https://api.lithtrix.ai`	Override for staging/dev

Lithtrix

What it does

Install

Install Node.js (if you don’t have it)

Sign up and create a Lithtrix key

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js (if you don’t have it)

Sign up and create a Lithtrix key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js (if you don’t have it)

Sign up and create a Lithtrix key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js (if you don’t have it)

Sign up and create a Lithtrix key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Published vulnerabilities (OSV.dev)

Discussion

User reviews

Compared with others in Search & AI memoryi

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Docs

README from the maker

lithtrix-mcp

1. Installation

2. Claude Desktop Configuration

3. Getting an API Key

4. Tools Exposed

5. Credential Vault Compatibility

6. Environment Variables