Ledgerbell onchain alerts

dev.workers.quietworklabs.ledgerbellPublished by ledgerbell.quietworklabs.workers.devOfficial publisherv0.4.0Updated Oct 28, 2026

Webhook alerts for EVM wallets, contract admin changes, Safe queues and custom events.

VerifiedStreamable HTTPWeb executableFinance Security & Monitoring

Server details

Identifier: dev.workers.quietworklabs.ledgerbell/ledgerbell
Transport: Streamable HTTP
Runtime: Web executable
Trust: Verified
Published: Oct 18, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified that this server's namespace belongs to ledgerbell.quietworklabs.workers.dev, which also runs its endpoint. That identifies the publisher; it does not make the server's tools safe.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

AI-generated overview

Remote MCP server that creates webhook alerts for EVM wallets, contract admin changes, Safe transaction queues and custom events.

What you can do: Create and manage API keys, including a free-plan key that is the only credential for its watches
Add watches for wallets, contracts, Safe queues or event signatures, with optional token filter and label
List plan, limits, today's alert count and all watches for a key
Send a test alert to a watch's webhook
Delete a watch to stop its alerts
Buy or extend 6 days of Pro on a key, raising watch and daily alert limits
When to use it: Useful when an assistant should set up onchain monitoring without writing infrastructure: watching an EVM address, tracking contract admin or proxy changes, following a Safe queue, or alerting on a specific event signature delivered to a webhook.
Requirements: Remote streamable HTTP endpoint; no local runtime, environment variables or headers declared. An API key is created through the create_api_key tool and must be saved by the caller. A webhook URL is needed to receive alerts. Pro purchases are paid in USDC on Base via x402.

Before you install

The created API key is the only credential for its watches and cannot be recovered, so it must be stored safely. buy_pro_6d spends $1 USDC per call on Base and can be called repeatedly to extend, so repeated calls cost money. Watches send data to the configured webhook, and delete_watch permanently removes a watch.

Installation

In SourceWeft

Open Ledgerbell onchain alerts in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.workers.quietworklabs.ledgerbell%2Fledgerbell/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "ledgerbell-onchain-alerts": {
      "type": "http",
      "url": "https://ledgerbell.quietworklabs.workers.dev/mcp"
    }
  }
}

Tools

create_api_key

Create a Ledgerbell API key

Create a new free-plan API key. Save it: it is the only credential for your watches and cannot be recovered. Free.

Takes no parameters.

add_watch

Watch an address and alert a webhook

Start watching an address. kind=wallet|contract|event|safe_queue. For kind=event pass event as a signature like Transfer(address,address,uint256) or a topic0. Optional token (wallet kind: only this ERC-20) and label. Free.

Parameterskeyrequiredkindrequiredchainrequiredeventlabeltokenaddressrequiredwebhookrequired

list_watches

List watches and plan

Show plan (free/pro), limits, alerts today and all watches for a key. Free.

Parameterskeyrequired

test_watch

Send a test alert

Send a test alert to a watch's webhook (5 per hour). Free.

Parametersidrequiredkeyrequired

delete_watch

Delete a watch

Stop and delete a watch. Free.

Parametersidrequiredkeyrequired

buy_pro_6d

Add 6 days of Ledgerbell Pro

Adds 6 days of Pro to the given key (or creates a new Pro key if none is given): 30 watches, 1,000 alerts/day, Safe queued-transaction alerts, proxy-upgrade reports. Call again to extend. Price: $1 USDC per call via x402 (Base).

Parameterskey

Version history

v0.4.0LatestOct 18, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Publish an icon in the registry entry.
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.