Nullprint vs Charlotte
A side-by-side look at the Nullprint and Charlotte MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
N
NullprintBrowser Automation · Local subprocess (stdio)Create, launch, check and drive Nullprint multi-profile browser profiles from any MCP agent.53GoodAuth: api key requiredVerdict: choose Nullprint for browser automation work as a local process; choose Charlotte for browser automation as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
NChoose Nullprint when
- You need dedicated capabilities in the Browser Automation domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
NULLPRINT_API_KEY, NULLPRINT_DAEMON_URL, NULLPRINT_PORT, NULLPRINT_HOME. - You want tools like
profiles_list, profile_start, profile_stop.
Choose Charlotte when
- You need dedicated capabilities in the Browser Automation domain.
- You prefer a local stdio subprocess transport.
- You want tools like
charlotte_navigate, charlotte_back, charlotte_forward.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | N Nullprint | |
|---|---|---|
| Category | Browser Automation | Browser Automation |
| Quality signal | 53/100 · Good | 68/100 · Great |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | API key required | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | NULLPRINT_API_KEYNULLPRINT_DAEMON_URLNULLPRINT_PORTNULLPRINT_HOME | None listed |
Tools & capabilities
Nullprint tools 17
profiles_listList every profile with status (running / idle), exit and ledger metadataprofile_startOpen a browser session for a profile; returns the driving endpointsprofile_stopStop that profile's browser (session or app-launched window)profile_createCreate a profile (fingerprint generated and frozen), optionally with proxy, ledger and start pagesprofile_checkupConsistency check-up, returns `{summary, checks}proxy_checkStateless proxy test: exit IP, country, latencyprofile_deleteSoft delete to the recycle bin (recoverable); refused while runningtrash_listRead-only list of recoverable profiles in the recycle binprofile_restoreRestore from the recycle bin with fingerprint, proxy and logins intactsession_gotoNavigate the session's current pagesession_snapshotAccessibility tree of the current page (find selectors, read state)session_click_selectorClick an element by CSS selector- +5 more on the listing page
Charlotte tools 23
charlotte_navigateLoad a URL in the active page. Returns page representation after navigation. Default minimal detail includes landmarks, headings, and interactive element counts — use charlotte_find to locate specific elements, or pass detail: 'summary' to get the full element list.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Nullprint
{
"mcpServers": {
"nullprint": {
"command": "uvx",
"args": [
"nullprint-mcp"
],
"env": {
"NULLPRINT_API_KEY": "YOUR_NULLPRINT_API_KEY_HERE",
"NULLPRINT_DAEMON_URL": "YOUR_NULLPRINT_DAEMON_URL_HERE",
"NULLPRINT_PORT": "YOUR_NULLPRINT_PORT_HERE",
"NULLPRINT_HOME": "YOUR_NULLPRINT_HOME_HERE"
}
}
}
}
Charlotte
{
"mcpServers": {
"charlotte": {
"command": "npx",
"args": [
"@ticktockbent/charlotte"
]
}
}
}
Frequently asked questions
Nullprint is categorized under Browser Automation and uses a local stdio subprocess. Charlotte belongs to Browser Automation and uses a local stdio subprocess. Pick Nullprint for browser automation work and Charlotte for browser automation.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Nullprint has no declared pricing — check the project's own site. Auth: api key required. Charlotte has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add nullprint and charlotte as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Nullprint has a quality signal of 53/100 (Good) with 0 views, 0 installs and 0 GitHub stars. Charlotte has 68/100 (Great) with 1 views, 0 installs and 181 GitHub stars.
