posterly-mcp-server@0.62.0
VERIFIED· startup onlyPublisher claims: "MCP server for posterly: schedule and publish social media posts across 18 platforms from any MCP client (Claude, ChatGPT, Cursor, Windsurf, Cline, and more)" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
Coverage
Startup only; authenticated tool behavior not tested.- Tested
- server startup over stdio (initialize sent) · every file read, file written and host contacted by what ran
- Not tested
- the tool list (the server exited before answering) · what the tools do when called with real credentials
What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.
Before you give it your token
- It will ask for
POSTERLY_API_KEYConfiguration, not credentials: POSTERLY_API_BASE_URL, POSTERLY_DIRECTORY_PROFILE, POSTERLY_TOOLSETS, POSTERLY_URL- Where it talks to
- poster.ly (its own)
- What the honeypot saw
- no credential files read · no network
- What we could not test
- the tool list (the server exited before answering) · what the tools do when called with real credentials
Connect it with a scoped credential, under the guard. It asks for POSTERLY_API_KEY and talks to poster.ly. 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. What the tools do with a real credential was not observed.
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; startup only; authenticated tool behavior not tested) on 2026-11-14 and scored it 93/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 27 s · 2 scenarios · 0 deviationsStatic findings
return `update available: restart the MCP client or run ${code('npx -y posterly-mcp-server@latest')}`;Fix: Pin versions and sources; vendor anything fetched at install time.No other findings across 17,165 lines in 81 files.
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 posterly-mcp-server@0.62.0 as of 7d ago. This is the package itself, not its dependencies.