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Tools
scrape_substack
Read Substack publications and posts, or search Substack by keyword. Give publications as URLs, domains, substack.com profiles, or bare Substack names (for example lenny.substack.com, https://www.notboring.co, lenny). Each publication returns one publication row (name, author, subscriber count as Substack shows it, subscriber tier text, paid plan prices) and its newest posts, one row each with dat
publications array
Substack publications, one per line, up to 100: a URL (https://www.lennysnewsletter.com), a domain (lenny.substack.com), a profile (substack.com/@lenny), or a bare Substack name (lenny). Each one retu
search_queries array
Keywords to search across Substack posts, one per line, up to 20. Each query returns matching posts, or the publications behind them when Search output is publications.
search_output string
What a search query returns. Default posts.
max_posts_per_publication string
Newest posts returned per publication, 0 to 1000. 0 returns only the publication row. Default 20.
max_search_results string
Rows returned per search query, 1 to 1000. Default 50.
since_days string
Optional. Skip posts older than this many days. 0 or empty keeps every post up to the max. Default 0.
include_publication_row string
true to return one publication row per listed publication (name, author, subscribers, paid plan prices), billed as a publication row. false returns only post rows. Default true.
include_body string
true to add the post text (up to 20,000 characters) to each post row of a listed publication. A paid post gives its free preview. Reads one more page per post; no extra charge. Default false.
max_charge_usd string
Optional. The run stops before it would charge more than this.
proxy_mode string
How pages are fetched. Default auto.
A call is made on an account: it counts against an allowance and the publisher sees it, which is why this one asks who you are first.
96/100
trust score
1
tool declared
remote
via our gateway
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p95 latency
What it does
Read any Substack publication or search Substack by keyword. Returns subscriber counts, paid plan prices, and every post with its date, paid flag, likes, comments, and restack counts. Useful for newsletter research and sponsor prospecting.
Quickstart
# 1 — sign in once: npx mcprush@latest login
# it asks for a key from mcprush.com/dashboard#access
# 2 — install
npx mcprush@latest add mambalabs/substack-scraper-mcp
# 3 — ask your agent for something these tools do
# scrape_substack
Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither.
Substack Scraper costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publisher
Installation
Where are you running it?
Every route below installs the same thing and ends at the same approval screen. Nothing here runs on your machine — this server runs on infrastructure we host behind our gateway, and what you install is the connection to it.
Claude Codenot declared — it may still work
Claude Code has its own MCP command, and the key rides on it as a header — the gateway refuses a call that carries none. Claude Code reads MCPRUSH_KEY each time it connects, so the key stays out of its config: export your key from Access in your shell profile (macOS, Linux), or run setx MCPRUSH_KEY <your key> and open a new terminal (Windows). Or let npx mcprush@latest add mambalabs/substack-scraper-mcp write the entry with the key for you; --scope user makes it available in every project. The first connection after a quiet spell starts the server, which takes up to a minute: if your client says it failed to connect, reconnect after that (/mcp in Claude Code).
claude mcp add --transport http --scope user mcp-substack-scraper https://mcprush.com/gw/mcp-substack-scraper/mcp --header 'Authorization: Bearer ${MCPRUSH_KEY}'Reconnect, or start a new session, and the tools appear in the model’s tool list.
Free to install on mcprush: no card. The gateway still answers a key, so you sign in once — which is also what gives you saved lists, release alerts and a budget cap.
What it asks of you
It reaches a system of yours, so it needs your own credential rather than the publisher’s: APIFY_TOKEN — Your Apify API token. Runs are billed to your own Apify account.. You set it after installing; the value is sealed here and handed to the server when it starts.
What it writes
One config entry pointing at the gateway. The server itself runs on infrastructure we host, so nothing from this listing executes on your machine.
What you approve
1 tool, with what each one reads, writes and reaches shown before you agree — the same list on every route above. Read the tool surface.
Tool surface
What the model actually sees. Descriptions are diffed on every release — see version history.
Read Substack publications and posts, or search Substack by keyword. Give publications as URLs, domains, substack.com profiles, or bare Substack names (for example lenny.substack.com, https://www.notboring.co, lenny). Each publication returns one publication row (name, author, subscriber count as Substack shows it, subscriber tier text, paid plan prices) and its newest posts, one row each with dat
| Parameter | Type | Required | Notes |
|---|---|---|---|
| publications | array | no | Substack publications, one per line, up to 100: a URL (https://www.lennysnewsletter.com), a domain (lenny.substack.com), a profile (substack.com/@lenny), or a bare Substack name (lenny). Each one retu |
| search_queries | array | no | Keywords to search across Substack posts, one per line, up to 20. Each query returns matching posts, or the publications behind them when Search output is publications. |
| search_output | string | no | What a search query returns. Default posts. |
| max_posts_per_publication | string | no | Newest posts returned per publication, 0 to 1000. 0 returns only the publication row. Default 20. |
| max_search_results | string | no | Rows returned per search query, 1 to 1000. Default 50. |
| since_days | string | no | Optional. Skip posts older than this many days. 0 or empty keeps every post up to the max. Default 0. |
| include_publication_row | string | no | true to return one publication row per listed publication (name, author, subscribers, paid plan prices), billed as a publication row. false returns only post rows. Default true. |
| include_body | string | no | true to add the post text (up to 20,000 characters) to each post row of a listed publication. A paid post gives its free preview. Reads one more page per post; no extra charge. Default false. |
| max_charge_usd | string | no | Optional. The run stops before it would charge more than this. |
| proxy_mode | string | no | How pages are fetched. Default auto. |
Free
$0 forever
- Every tool, no call limit, and mcprush charges nothing
- A buyer key from your dashboard — the gateway refuses a call without one
- Answers through our gateway, so every call is in your log
- Nothing to cap, because mcprush bills nothing
What counts against your monthly calls
| Tool | Unit | Calls used | Out of the allowance |
|---|
Nothing here is billable: mcprush charges nothing to install Substack Scraper or to call it, and its free tier carries no monthly call limit.
Call allowance · this installenforced at the gateway
Monthly allowance, in calls
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—
Alert at 80% · then the tool returns a normal MCP error
Used this month: —
ATrust score 96 / 100
Scanned: 1.0.0 · 29 Oct 2026
Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.
Threat score100
Client score96
Findings1 threat · 1 capability
Capabilitymoderate
Coveragesource
Verificationrepo
Surface digest74ed186d782ff46933e87eb19c09d21915a44b2fa9fd712378c9959087caad73
Score vectorthreat 100 → client 96
| Term | Level | What it prices | Points |
|---|---|---|---|
| capability-exposure | moderate | capability blast radius (moderate) — client exposure if the model is manipulated | −3 |
| verification-discount | repo | publisher verification (public source) — no provenance, but the source is public and inspectable | −1 |
| coverage-honesty | source | inspection depth (source) — how much of the target the scan could see | −0 |
score = clamp(round(threatScore − E_cap − E_ver − E_cov), 0, 100). No model, no opinion, no network call at scoring time: the same methodology version against the same bytes always produces this number, and every line above is a field of the report rather than a summary of it.
What the scan could actually read
A grade is only as meaningful as its coverage, so the scanner publishes its own depth before it publishes its result.
Tool surfaceread
Implementation sourceread
Package metadataread
Live transportnot available
Tools were statically extracted from the published source (1 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>".
Capability — what it could do if the model were manipulated
Tags derived from each tool’s schema and the implementation, not from what the tool calls itself. moderate is the level these add up to.
| Tool | Capability tags | Why the tag was assigned |
|---|---|---|
| scrape_substack | untrusted-inputexternal-sink | untrusted-input: keyword "scrape", declares openWorldHint: true (interacts with entities outside the server); external-sink: handler sends an HTTP POST (fetch(https://api.apify.com/v2/acts/${actorPath}/runs?timeout=${ACTOR_RUN_TIMEOUT_SECS}) at build/index.js:80 |
Toxic-flow graph
The lethal trifecta, checked as a graph rather than as a checklist: untrusted input, a sensitive source and an external sink have to meet before there is a path worth worrying about.
flow-1
Untrusted input can drive an external action even though no sensitive source is exposed.
Supply chain and provenance
Integrityfirst-seen
Surface digest74ed186d782ff469
Scanned2026-10-29
This is the first scan of this surface here, so there is nothing yet to compare it against.
Every result on this tab comes from one deterministic pass over the published package — offline, rule by rule, and auditable line by line above. Same methodology version, same bytes, same score.
Release history
The gateway serves every install the publisher’s current release, so a release cannot be pinned or rolled back to here yet. The history below is for reading; the current release on file is 0.1.0.
0.1.0
29 Oct 2026
latest- The version this listing went live with, after review.
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no reviews yet
Who can review
One review per account, from a signed-in account that does not publish this listing. Nothing else is asked — you can say what you think before you install it. Publishers can reply once per review, and a review can be edited or deleted by whoever wrote it.
Sign in to write one
Any signed-in account that does not publish Substack Scraper can review it, once — before installing it or after. A review from an account that has installed it is marked as one.
No reviews yet
Nobody has reviewed this listing. The rating on the card is the mean of the reviews written here and nothing else, so there is no rating until somebody writes the first — which takes a signed-in account that does not publish it, and nothing else.