Syl Pulse

Name: Syl Pulse
Author: connor274

by connor274version 0.1.0i★ –iRuns in the cloud

Registry nameio.sylai/pulse

Install

Overview

Description from the maker (original English)

Causal analytics: ask a business question, get a deterministic causal answer and charts.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi0 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Marketing & social media
You need to fill in: X-API-Key

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 0 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: X-API-Key

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http pulse https://pulse.sylai.io/mcp --header 'X-API-Key: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "pulse": {
      "url": "https://pulse.sylai.io/mcp",
      "headers": {
        "X-API-Key": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "pulse": {
      "type": "http",
      "url": "https://pulse.sylai.io/mcp",
      "headers": {
        "X-API-Key": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

X-API-Key secret required HTTP header
Your Syl API key (the same key as Syl Guardian; get a trial key at https://sylai.io/guardian).

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

! Caution
Maker matches the repo
The publisher (sylai.io) is not the repo owner (connor274); someone else may have listed it
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Marketing & social mediai

More stars than 0% of the other 2969 servers in this category
Published to the registry more recently than 70% of the other 2969 servers in this category
Basic checks equal to or better than 40% of the other 2969 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Syl Pulse safe?

It passed 0 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: X-API-Key

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 15 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Syl Pulse MCP

Syl Pulse is causal analytics for business questions. Give your agent a dataset and a question like "Does ad spend drive sales?" and get back the full Pulse report: the adjusted causal effect with its confidence interval, a by-channel breakdown, caveats and assumptions, and charts (causal graph, effect, trend). When the question asks about sample size or test duration, it also returns a spend-cut test design.

All numbers are deterministic statistics. They are never computed by an LLM, and the figures in the report prose are checked against the computed numbers. Optional LLM help (dataset cleaning, causal-graph pruning, estimator choice, report prose) is controlled per step with config; see Engine config.

This repository holds the public listing metadata and connection instructions for the hosted Pulse MCP server. Pulse itself is a hosted service.

Endpoint: https://pulse.sylai.io/mcp (stateless streamable HTTP)
Auth: X-API-Key header on every request. It is the same key as Syl Guardian; get a trial key at https://sylai.io/guardian.
Product page: https://sylai.io/pulse
Docs: https://sylai.io/guardian/docs (MCP connector section)

Connect

Claude Code:

claude mcp add --transport http syl-pulse https://pulse.sylai.io/mcp \

--header "X-API-Key: "

Claude Desktop (via mcp-remote):

"mcpServers": { "syl-pulse": { "command": "npx", "args": ["-y", "mcp-remote", "https://pulse.sylai.io/mcp", "--header", "X-API-Key:${SYL_API_KEY}"], "env": { "SYL_API_KEY": " " } } } }

Then ask your agent: *"Use pulse_analyze on this data: does ad_spend drive new_customers, adjusting for seasonality? How long would a spend-cut test need to run?"*

Every request needs the key, including tool listing. Each successful analysis counts against your Pulse quota or trial.

Tool: `pulse_analyze`

Estimates a causal effect from a dataset and answers a business question.

Argument	Description
`question`	Required. The business question, e.g. "Does ad spend drive sales?".
`csv` or `data`	Dataset as CSV text or a list of row objects (exactly one).
`cause`, `effect`	Optional. Treatment and outcome columns; inferred from the question if omitted.
`confounders`	Optional. Columns to adjust for, in addition to those discovered.
`outcomes`	Optional. Several outcome columns, for by-channel effects.
`time_col`	Optional. Time column, used for the test-design cadence.
`include_guardian_verdict`	Also return a `pass` / `caution` / `hold` verdict, computed locally (uses no Guardian quota).
`include_charts`	Attach chart images (default true).
`include_test_design`	Force the spend-cut test design on or off; by default it appears only when the question asks about sample size, power or test duration.
`estimator`	Optional. One of `ols_adjusted`, `aipw`, `ipw`, `psm`, `dml_forest`, or `rule` (the deterministic default). Omit to follow `config.estimator`.
`config`	Optional object choosing `rule` or `llm` per step: `cleaning`, `discovery`, `estimator`, `summary`. See Engine config.

The result's first content block is the report text, followed by chart images. The structured result has the effect size with its confidence interval, per-channel effects, confidence, caveats, and the optional verdict and test design. It also reports the estimator_used, the resolved config, and engine_steps. An invalid config (unknown key or a value other than rule or llm) comes back as a tool error, and misspelled argument names are rejected rather than ignored.

Engine config

config lets you choose, per step, whether the engine uses fixed rules or an LLM. Each value is "rule" or "llm". Omitted keys use the defaults:

Step	Default	What it controls
`cleaning`	`llm`	Dataset cleaning: derived columns and null imputation. The LLM only picks a strategy per column; the values are computed deterministically, and your cause and effect columns are never imputed.
`discovery`	`llm`	Pruning and orienting the causal graph, naming cause and effect from your question when you omit them, and reading your question to decide on optional extras such as a subgroup breakdown, a robustness check or a test design.
`estimator`	`rule`	Choosing the estimator. With `llm`, the model picks from the supported set based on each method's documentation, and may also choose a matching method. With `rule`, the deterministic default is used.
`summary`	`llm`	`llm` writes the report prose; `rule` uses a fixed template.

The model key is provided by the service; you never supply one. rule always works. If an llm step cannot run, it falls back to rule, and engine_steps reports {requested, used, fallback_reason} for each step. Setting all four to rule makes no LLM calls.

Example: {"config": {"estimator": "llm", "summary": "rule"}}.

Which settings can change a number: cleaning: llm (imputation strategy, derived-column drops), discovery: llm (the adjustment set) and estimator: llm (the method). summary: llm changes prose only. For results that don't depend on an LLM at all, set cleaning, discovery and estimator to rule.

For a quick pass/caution/hold check on a single claim, see the sibling server Syl Guardian MCP.

Support

Questions or issues: https://sylai.io or connor@sylai.io.

License

The files in this repository (metadata and documentation) are MIT licensed; see LICENSE. The Syl Pulse service is proprietary.

Syl Pulse

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Marketing & social mediai

Common questions

Alternatives

MCP YouTube Transcript

Google Analytics MCP

BibiGPT YouTube Video Summarizer

README from the maker

Syl Pulse MCP

Connect

Tool: pulse_analyze

Engine config

Support

License

Tool: `pulse_analyze`