Pebbler Human Feedback

Name: Pebbler Human Feedback
Author: bridge-applications

by bridge-applicationsversion 0.1.0i★ –iRuns on your computer

Registry nameio.github.bridge-applications/pebbler-mcp

Install

Overview

Description from the maker (original English)

Buy human image preference comparisons on the Pebbler app with locally controlled USDC payments.

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 checksi1 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 on your computer
Transport: stdio
Category: Design, images & audio
You need to fill in: PEBBLER_WALLET_PRIVATE_KEY

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: PEBBLER_ALLOW_PAYMENTS, PEBBLER_WALLET_PRIVATE_KEY, PEBBLER_MAX_PURCHASE_USDC, PEBBLER_MAX_TOTAL_USDC, PEBBLER_STATE_DIR

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

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "pebbler": {
      "command": "npx",
      "args": [
        "-y",
        "@pebbler/pebbler-mcp"
      ],
      "env": {
        "PEBBLER_ALLOW_PAYMENTS": "your-value",
        "PEBBLER_WALLET_PRIVATE_KEY": "your-value",
        "PEBBLER_MAX_PURCHASE_USDC": "your-value",
        "PEBBLER_MAX_TOTAL_USDC": "your-value",
        "PEBBLER_STATE_DIR": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add pebbler --env PEBBLER_ALLOW_PAYMENTS=your-value --env PEBBLER_WALLET_PRIVATE_KEY=your-value --env PEBBLER_MAX_PURCHASE_USDC=your-value --env PEBBLER_MAX_TOTAL_USDC=your-value --env PEBBLER_STATE_DIR=your-value -- npx -y @pebbler/pebbler-mcp

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": {
    "pebbler": {
      "command": "npx",
      "args": [
        "-y",
        "@pebbler/pebbler-mcp"
      ],
      "env": {
        "PEBBLER_ALLOW_PAYMENTS": "your-value",
        "PEBBLER_WALLET_PRIVATE_KEY": "your-value",
        "PEBBLER_MAX_PURCHASE_USDC": "your-value",
        "PEBBLER_MAX_TOTAL_USDC": "your-value",
        "PEBBLER_STATE_DIR": "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": {
    "pebbler": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@pebbler/pebbler-mcp"
      ],
      "env": {
        "PEBBLER_ALLOW_PAYMENTS": "your-value",
        "PEBBLER_WALLET_PRIVATE_KEY": "your-value",
        "PEBBLER_MAX_PURCHASE_USDC": "your-value",
        "PEBBLER_MAX_TOTAL_USDC": "your-value",
        "PEBBLER_STATE_DIR": "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 one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

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

Values you fill in

PEBBLER_ALLOW_PAYMENTS env
Explicitly enable local wallet signing
PEBBLER_WALLET_PRIVATE_KEY secret env
Local wallet signing key; required only for payments
PEBBLER_MAX_PURCHASE_USDC env
Your maximum USDC spend per test. Required when payments are enabled.
PEBBLER_MAX_TOTAL_USDC env
Your cumulative USDC spending limit. Required when payments are enabled; does not reset automatically.
PEBBLER_STATE_DIR env
Optional private folder to retain access to your tests across restarts.

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

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account bridge-applications, which owns the repo
… 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 applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Design, images & audioi

More stars than 0% of the other 2751 servers in this category
Published to the registry more recently than 46% of the other 2751 servers in this category
Basic checks equal to or better than 100% of the other 2751 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 Pebbler Human Feedback safe?

It passed 1 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: PEBBLER_WALLET_PRIVATE_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 33 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Figma Context MCP, Claude Real Video, Figma MCP Server

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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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.

Pebbler MCP

Let your agent collect human feedback on two images and explain the results. Pebbler runs image preference tests with participants on the Pebbler app.

Your agent retrieves current pricing, package details and availability before creating a test. The purchase uses a live quote and stays within the spending limits you configure. Pricing and package sizes are not fixed by this connector.

Version 1 supports image A/B preference tests. These measure which image people prefer, rather than product conversion or causal effects. Completed response counts are not guaranteed. Surveys and text-only comparisons are not supported.

Connect your agent

Use an MCP app that supports local servers and Node.js 22 or later. Add this configuration to your app:

"mcpServers": { "pebbler": { "command": "npx", "args": ["-y", "@pebbler/pebbler-mcp@0.1.0"] } } }

Pebbler's production settings are included. You can explore current packages and create drafts without enabling payments.

Enable purchases

Use a dedicated wallet funded with native USDC on Base. Configure these settings locally in your MCP app's environment or secret settings:

Setting	What to provide
`PEBBLER_ALLOW_PAYMENTS`	Set to `true` when you want the agent to make purchases
`PEBBLER_WALLET_PRIVATE_KEY`	Your wallet's signing key, supplied privately
`PEBBLER_MAX_PURCHASE_USDC`	Your chosen maximum spend per test, as a positive decimal USDC amount
`PEBBLER_MAX_TOTAL_USDC`	Your chosen cumulative spending limit, as a positive decimal USDC amount

Both spending limits are required when payments are enabled. They are your budget, not the price of a test. If a quote exceeds either limit, the connector stops instead of raising your budget. Payments stay disabled until you enable them explicitly.

The wallet key remains local. Do not put it in a prompt or share it in a conversation. Prices and quotes are fetched by the agent; you do not need to configure them.

Ask for a test

For example:

Check the current package and price, then compare these two image URLs. Tell me the quote before buying and stay within my configured budget.

Provide two publicly accessible HTTPS image URLs and a clear question. Use images you own or have permission to use, and keep the URLs available while responses are collected.

Your agent can show the current offer, create a draft, purchase the test and check progress. You can read partial results while collection continues or return later to ask for the final counts and vote shares. Retrieving results is included in the purchase.

Available tools

Tool	Purpose
`get_catalog`	Retrieve current packages, prices, supported inputs and availability
`create_study`	Prepare an image comparison and obtain its quote
`quote_study`	Refresh a quote before payment has been signed
`purchase_study`	Purchase the quoted test within your wallet's spending limits
`get_study_status`	Check progress and when to check again
`get_study_results`	Retrieve aggregate A/B votes and shares
`list_local_studies`	Find your saved tests after returning or restarting

The agent learns each tool's inputs automatically when connected. It should read the catalog first, use the quote for the purchase, and follow the returned polling interval when checking progress.

Returning to your results

Keep the connector's private local state folder backed up. It retains access to your tests and their purchase history across restarts. You can choose a folder with PEBBLER_STATE_DIR; use the same folder when returning to existing tests.

Your total spending limit counts retained signed purchases, including unresolved attempts, and does not reset automatically. Increase it deliberately if you want to buy more tests. Keep the original state rather than deleting it to reset your budget.

If a purchase is interrupted or pending, ask the agent to retry that same purchase. The connector preserves its identifiers and payment authorization instead of signing another payment. Reading progress and results does not require another purchase.

Try an example

The included examples/run-study.mjs demonstrates discovery and creating an image comparison. It prints the live catalog and quote; purchasing requires the --purchase flag and your locally configured wallet and budgets.

License

MIT. Original example image assets are included under the same license.

Pebbler Human Feedback

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 Design, images & audioi

Common questions

Alternatives

Figma Context MCP

Claude Real Video

Figma MCP Server

README from the maker

Pebbler MCP

Connect your agent

Enable purchases

Ask for a test

Available tools

Returning to your results

Try an example

License