langflow-mcp-server@4.13.5
VERIFIEDPublisher claims: "Integration for Langflow API 1.13.2 via Model Context Protocol (MCP)" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
Coverage
Server started and answered tools/list.- Tested
- MCP initialize and tools/list · every tool description, for hidden instructions · every file read, file written and host contacted by what ran
- Not tested
- what the tools do when called with real credentials
Before you give it your token
- It will ask for
AUTH_TOKENLANGFLOW_API_KEYConfiguration, not credentials: ENABLE_DEPRECATED_TOOLS, LANGFLOW_BASE_URL, LANGFLOW_CONSOLIDATED_TOOLS, LANGFLOW_TIMEOUT, LANGFLOW_TOOL_MODE, MCP_ALLOWED_ORIGINS, MCP_HTTP_JSON_RESPONSES, MCP_MAX_CONCURRENT_BODY_BYTES, MCP_MAX_CONCURRENT_REQUESTS, MCP_MAX_SESSIONS, MCP_MODE, MCP_PATH, MCP_REQUEST_BODY_TIMEOUT_MS, MCP_SESSION_IDLE_TIMEOUT_MS, MCP_SHUTDOWN_TIMEOUT_MS- Where it talks to
- no vendor host named in the code
- What the honeypot saw
- no credential files read · no network
- What we could not test
- what the tools do when called with real credentials
Connect it with a scoped credential, under the guard. It asks for AUTH_TOKEN, LANGFLOW_API_KEY and talks to its vendor. Give the credential to the guard, not the server: the value never enters the server's environment and only travels to the host you bind.
Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.
Is [email protected] safe to install?
KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios) on 2026-11-11 and scored it 88/100 (Verified). It did what it claims and nothing else we could detect: no undeclared network egress, no credential reads, no persistent instruction writes. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 33 s · 2 scenarios · 0 deviationsStatic findings
".env.example",Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.api_key: 'sk-test-1234567890abcdefghijklmnopqrstuvwxyz'Fix: Never read or enumerate credential locations; accept a documented environment variable instead.preproc_kill_phrase: { type: 'string', description: 'Preprocessing kill phrase' }Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.preproc_kill_phrase: { type: 'string', description: 'Preprocessing kill phrase - for create' },Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.Cost to the agent
Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.
Known vulnerabilities
No advisories in OSV for langflow-mcp-server@4.13.5 as of 3d ago. This is the package itself, not its dependencies.