Span runs on your own machine — the client starts it, so there is no endpoint to ping. 1 571 installs a week from pypi. Last commit 26 Oct 2026.
Codebase understanding stored with its evidence, marked stale when that evidence changes.
What the code does
We read the source, 6 h ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
proc = subprocess.run(cmd, capture_output=True, text=True)
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add span -- uvx span-mcp{
"mcpServers": {
"span": {
"command": "uvx",
"args": [
"span-mcp"
]
}
}
}[mcp_servers.span]
command = "uvx"
args = ["span-mcp"]{
"mcpServers": {
"span": {
"command": "uvx",
"args": [
"span-mcp"
]
}
}
}{
"servers": {
"span": {
"type": "stdio",
"command": "uvx",
"args": [
"span-mcp"
]
}
}
}Alternatives to Span
same job, measured the same wayEvidence-backed codebase understanding with file:line citations, for AI clients over MCP.
MCP that provides fast, token-efficient tools for navigating, searching, and understanding codebases
Runs coding-agent workers on a codebase question; every claim in the answer carries evidence.
Codebase memory for AI agents: an AST index plus agent-written notes that self-stale.
Browser-backed QA with evidence and fix-ready reports for coding agents.
Detect stale source context and retain traceable code-chain understanding for AI coding agents.
Names every column, index, view and seed row in a .sql migration that stores card data, with its PCI
Search robot code and exact-version findings; check evidence before preparing with the Hub CLI.
Span — questions
Answers built from our own checks of this server.