Lens MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 46 installs a week from npm. Last commit 1 Nov 2026.
Outside-in validation gate for AI-generated text; a separate model checks LLM output, fail-closed.
What the code does
We read the source, 1 d 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.
child = spawn(KIT_BIN, args, {
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 lens-mcp -- npx -y @soulfield/lens-mcp{
"mcpServers": {
"lens-mcp": {
"command": "npx",
"args": [
"-y",
"@soulfield/lens-mcp"
]
}
}
}[mcp_servers.lens-mcp]
command = "npx"
args = ["-y", "@soulfield/lens-mcp"]{
"mcpServers": {
"lens-mcp": {
"command": "npx",
"args": [
"-y",
"@soulfield/lens-mcp"
]
}
}
}{
"servers": {
"lens-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@soulfield/lens-mcp"
]
}
}
}Optional settings from the registry entry, left out of the block above:
SOULFIELD_API_BASE (Lens API base URL. Use https://api.soulfield.one for the hosted service), SOULFIELD_API_KEY (API key for validate_content and scrub_pii. Get one free, self-serve, no card, at https://api.soulfield.one/pricing#signup. lens_health needs no key).
Alternatives to Lens MCP
same job, measured the same wayDocument tooling for AI agents: PDF/text reading, chunking, schema-validated JSON output.
Fail-closed MCP adapter for untrusted model output over a local Tkach runtime.
Audit websites for AI search readiness and generate or validate llms.txt. Free quick check.
Kling AI video generation MCP server for Model Context Protocol hosts
Hallucination validator and factual grounding checker for LLM outputs.
AI VAT Number Validation: hosted MCP server for EU VAT number checks via VIES.
Fail-closed deterministic checks and hash-chained receipts for AI agent outputs via MCP.
Generate, validate and check robots.txt rules for AI crawlers. Free; optional Pro key.
Lens MCP — questions
Answers built from our own checks of this server.