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Social media scheduler for AI agents: draft posts into a human-approved queue for 15 networks.
Do not connect
A critical issue was found. Do not connect this server as-is.
Scanned 6 days ago
A server can change after it's graded. Re-run the automated scan to refresh this report.
This grade is deterministic and reproducible: the same server surface always yields the same grade under a given algorithm version. It is a real automated assessment computed by the MCPGrade engine from what the probe actually observed — not a fabricated or opinion score. It is not a manual human pentest, so it can miss context-specific risks.
Every signal below was measured directly by the automated probe. The grade is derived only from evidence like this — nothing is assumed.
The posthell MCP server exposes 4 tools, focused primarily on general-purpose capabilities. Its published description reads: "Social media scheduler for AI agents: draft posts into a human-approved queue for 15 networks". It communicates over Streamable HTTP using the 2025-06-18 protocol revision, and does not require authorization to connect. MCPGrade currently rates posthell F — a critical issue was found and the server should not be connected as-is. Its most notable findings include "Data-exfiltration parameters" and "Cross-tool shadowing". This report is a deterministic, reproducible automated assessment: the same observed surface always yields the same grade under a given algorithm version, and it is refreshed as new scans arrive and free to read — but it is not a substitute for a manual human security review. Always re-check posthell's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add posthell to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://www.posthell.com/api/mcpStreamable HTTP transport. This is the MCP endpoint, not a website — paste it into your MCP client server list rather than a browser.
Captured passively during the read-only scan. Click any value to find servers that match it.
The tools this server advertises via tools/list — names, purposes, and the parameters each accepts, exactly as enumerated read-only.
Turn rough notes about what the user did (shipped a feature, fixed a bug, hit a number) into 2-3 finished social-post angles in the user's voice. Grounded only in the notes - never invents facts. Uses
Save a post as a DRAFT in the user's posthell queue. It is never published by this tool - the user approves it in the dashboard. Optionally propose a publish time (pre-fills their scheduler) and limit
Read the user's recent posts and drafts with per-platform status. Published posts include engagement metrics (likes, comments, shares, engagementRate - impressions on plans with full analytics) once a
The user's follower counts and 7-day growth per connected network, plus which network is growing fastest. Use this to decide where a post matters most or to report progress.
Sorted worst-first. Each finding shows its severity, what it means, its OWASP MCP Top-10 mapping, and a recommended fix — the check id links to the exact methodology row that produced it.
tool: shape_post
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "notes"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: (server instructions)
A tool description tries to alter the model’s use of another tool.
) Typical flow: shape_post with rough notes -> pick the best angle -> creaRecommendationDescriptions must describe only their own tool.
The server accepts tool enumeration (and likely invocation) with no authentication.
RecommendationRequire OAuth 2.1 authorization for any server exposing non-public tools.
tool: shape_post
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "shape_post"RecommendationScope tools to the minimum needed.
tool: create_draft
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "create_draft"RecommendationScope tools to the minimum needed.
tool: list_posts
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "list_posts"RecommendationScope tools to the minimum needed.
tool: get_growth
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "get_growth"RecommendationScope tools to the minimum needed.
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Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
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