Posta MCP Server
posta-mcp
npm
v0.1.2
Published by an unidentified publisher — no publish provenance and no public repository, so the publisher could not be verified and the source cannot be independently located.
MCP server for Posta (getposta.app) — schedule and publish to multiple social platforms from any MCP client (Claude Desktop, Cursor, Windsurf, VS Code, Zed, …).
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 0 = 100. What the published surface and source actually contain:
The deterministic scan raised no scored threat in the surface it inspected — the threat score stayed at 100. Capability observations and advisory notes are recorded but never lower it.
2. Client adoption risk — 100 − 5 = 95. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −3 | capability blast radius (moderate) — client exposure if the model is manipulated |
| −2 | publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 1
medium Unconstrained URL/host parameter "url" on "posta_upload_from_url"MTC-CAP-007
Tool "posta_upload_from_url" takes a URL/host parameter "url" with no allowlist/pattern. An outbound-request tool with an unbounded destination enables SSRF and cloud-metadata access (e.g. 169.254.169.254).
Fix: Allowlist destinations or constrain the parameter; block private/link-local addresses server-side.
Location: tool posta_upload_from_url · inputSchema.properties.url
Tools 25
Each tool and what it can reach — statically extracted from the published source.
posta_upload_from_urlingests untrusted inputposta_cancel_postno sensitive capabilityposta_compare_postsno sensitive capabilityposta_create_postno sensitive capabilityposta_delete_mediano sensitive capabilityposta_delete_postno sensitive capabilityposta_generate_carousel_pdfno sensitive capabilityposta_get_analytics_overviewno sensitive capabilityposta_get_analytics_postsno sensitive capabilityposta_get_aspect_ratiosno sensitive capability
Show 15 more tools ↓
posta_get_benchmarksno sensitive capabilityposta_get_best_timesno sensitive capabilityposta_get_calendarno sensitive capabilityposta_get_mediano sensitive capabilityposta_get_pinterest_boardsno sensitive capabilityposta_get_planno sensitive capabilityposta_get_platformno sensitive capabilityposta_get_platform_specsno sensitive capabilityposta_get_postno sensitive capabilityposta_list_accountsno sensitive capabilityposta_list_mediano sensitive capabilityposta_list_postsno sensitive capabilityposta_publish_postno sensitive capabilityposta_schedule_postno sensitive capabilityposta_update_postno sensitive capability
What this scan could not see
- Tools were statically extracted from the published source (25 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Versions 1
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v0.1.2 latest |
A 95/100 | 1 | 1.13.0 | 2026-09-07 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
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