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Zero-egress AI Agent Firewall: SARA prompt injection defense, AST context pruning & MCP governance.
io.github.heuristicolab/ctxfw is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 78/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding io.github.heuristicolab/ctxfw to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
uvx ctxfw==4.1.1Review the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-10-25T19:17:49.054414Z",
"publishedAt": "2026-10-25T19:17:49.054414Z",
"statusChangedAt": "2026-10-25T19:17:49.054414Z"
}
},
"server": {
"name": "io.github.heuristicolab/ctxfw",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"version": "4.1.1",
"packages": [
{
"version": "4.1.1",
"transport": {
"type": "stdio"
},
"identifier": "ctxfw",
"registryType": "pypi",
"packageArguments": [
{
"type": "positional",
"value": "mcp"
}
]
}
],
"repository": {
"url": "https://github.com/heuristicolab/ctxfw",
"source": "github"
},
"description": "Zero-egress AI Agent Firewall: SARA prompt injection defense, AST context pruning & MCP governance."
}
}