substack-mcp (ryanrodrigues25200525-svg/substack-mcp) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 14 tools. No publisher has claimed this listing.

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C
Caution
74/100

substack-mcp

Read-only MCP server for accessing Substack content including publications, posts, comments, author profiles, recommendations, and Notes feed using your own session token.

→ ryanrodrigues25200525-svg/substack-mcp· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

Code Verified⚡ Live Monitored: not connected

Verified is a snapshot. Live keeps it current, and builds your track record.

⚡ Connect GitHub → continuous verification on every pushwhy connect →

Who stands behind it

ryanrodrigues25200525-svg

Source: Glama

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
⚠️
Known vulnerabilities in dependencies: 1 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 1 credential: SUBSTACK_SESSION_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes14 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

list_published_posts

List recent published posts from a given Substack publication (e.g. 'stratechery.com' or 'name.substack.com')

get_post

Get full content of a post by slug from a given publication. Works on paywalled posts if you're a paid subscriber.

search_posts

Search posts within a given publication by text query

list_subscriptions

List the publications you're subscribed to (free and paid)

get_post_by_url

Fetch a post's full content given any post URL, including generic substack.com/@handle/p-<id> links — resolves the real publication domain and slug automatically.

search_all_subscriptions

Search for posts matching a query across every publication you're subscribed to or follow. Pass tag to narrow the search to publications carrying that tag (see tag_publication).

get_post_comments

Get comments (with nested replies) on a post by domain + slug

get_post_comments_by_url

Get comments (with nested replies) on a post given any post URL

get_author_profile

Get a Substack author's public profile (bio, social links, publications they write for) by their handle

get_recommendations

List other publications that a given Substack publication recommends to its readers

get_inbox

List new posts across every publication you're subscribed to or follow, newest first, with read/unread state. Wider coverage than list_subscriptions + list_published_posts per pub, and one call instead of many. Pass tag to narrow to publications carrying that tag (see tag_publication).

tag_publication

Tag a publication (e.g. by topic, like 'financial-research') so it can be scoped later with search_all_subscriptions/get_inbox's tag filter, or looked up with list_tags. Tags are local to this machine — Substack doesn't expose a topic field to read this from. Pass an empty tags array to untag.

list_tags

List every tag you've set with tag_publication and which publications carry each one.

get_notes_feed

List recent items from your Substack Notes home feed (short-form posts from people/publications you follow)

// known CVEs in dependencies1 high

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.0.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configSUBSTACK_MCP_TAGS_FILE). Tag your accounts by whatever grouping you want — e.g. financial-research
🔐 secretSUBSTACK_SESSION_TOKEN"": "your_token_here"
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

14/14 tools missing one or more hints — list_published_posts (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_post (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); search_posts (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +11 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tests exist

No test files found

Add tests that exercise each declared tool.

Production dependencies are patched

0 critical, 1 high severity in production deps — @modelcontextprotocol/sdk@1.0.0 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/ryanrodrigues25200525-svg/substack-mcp?variant=verified)](https://m8ven.ai/mcp/ryanrodrigues25200525-svg/substack-mcp)
Shows verification status without the grade. Want the grade badge instead? Remove ?variant=verified from the URL.
commit: 0735a1b9b487712d3edadc0141227e4567a914c6
code hash: d857f1d664e23bd20b0d923fd20432cab47c1a341f40f86e2b3ea32571cb4ed5
view raw JSON →
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