ctxfw
Rank #7,252io.github.heuristicolab/ctxfw
Zero-egress AI Agent Firewall: SARA prompt injection defense, AST context pruning & MCP governance.
What you can do with ctxfw
ctxfw is a Model Context Protocol (MCP) server published by heuristicolab. It ranks #7,252 of 166,322 active servers on MCP Toplist, and its repository has 7 GitHub stars. ctxfw is listed across 2 registries — Official MCP and Glama, with 1 tracked version. It was first listed on Sep 17, 2026 and most recently updated on Oct 25, 2026.
Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.
What ctxfw can and cannot do
Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.
What you need before using ctxfw
The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.
Declared by Glama, last synced Nov 2, 2026. Not independently verified by MCP Toplist.
No runtime, credential or payment requirements are recorded for this server beyond the declaration above.
Connect ctxfw and confirm it works
claude mcp add ctxfw -- uvx ctxfw mcp[mcp_servers.ctxfw]
command = "uvx"
args = ["ctxfw", "mcp"]Add to ~/.codex/config.toml.
{
"mcpServers": {
"ctxfw": {
"command": "uvx",
"args": [
"ctxfw",
"mcp"
]
}
}
}Add to claude_desktop_config.json (Settings → Developer → Edit Config).
{
"mcpServers": {
"ctxfw": {
"command": "uvx",
"args": [
"ctxfw",
"mcp"
]
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).
{
"servers": {
"ctxfw": {
"type": "stdio",
"command": "uvx",
"args": [
"ctxfw",
"mcp"
]
}
}
}Save as .vscode/mcp.json in your workspace.
{
"mcpServers": {
"ctxfw": {
"command": "uvx",
"args": [
"ctxfw",
"mcp"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
{
"mcpServers": {
"ctxfw": {
"command": "uvx",
"args": [
"ctxfw",
"mcp"
]
}
}
}After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.
When to choose another server
No task-specific alternatives are catalogued for ctxfwyet; the list above is its publisher's other servers.
What changed, and when this was checked
- First listed
- Sep 17, 2026
- Latest version published
- Oct 25, 2026
- Version history
- 1 version tracked (below)
- Requirements evidence
- Declared by Glama, last synced Nov 2, 2026. Not independently verified by MCP Toplist.
- Profile checked
- Not yet — purpose, capabilities and requirements above come from registry data only
- Ranking data as of
- Nov 2, 2026
- Glama ↗listed since Sep 18, 2026 · still listed
- Official MCP ↗listed since Oct 26, 2026 · still listed
Do you maintain ctxfw? to correct or enrich this profile.
Available versions (1)
| Version | Published |
|---|---|
| 4.1.1 | Oct 25, 2026 |
Ranks ahead of 159,070 of 166,322 servers on MCP Toplist.
Show your rank
Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.
[](https://mcptoplist.com/server/io.github.heuristicolab%2Fctxfw)<a href="https://mcptoplist.com/server/io.github.heuristicolab%2Fctxfw"><img src="https://mcptoplist.com/badge/io.github.heuristicolab%2Fctxfw.svg" alt="MCP Toplist: Top 5% of 166,322" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Frequently asked questions
- Who maintains ctxfw?
- ctxfw is maintained by heuristicolab, which publishes 2 MCP servers (2 total versions) tracked on MCP Toplist.
- Is ctxfw listed on the Official MCP Registry?
- Yes — ctxfw is listed on the Official MCP Registry, alongside Glama.
- How many versions does ctxfw have?
- MCP Toplist tracks 1 version of ctxfw, most recently published on Oct 25, 2026.
- Where can I find the source code for ctxfw?
- The source code for ctxfw is hosted at github.com/heuristicolab/ctxfw.
Do you run this server?
Community projects list the MCP servers behind real agents and apps. Publish yours and this page will link to it.