AgentObserver - Check x402 Dependencies Before Paying

io.github.kaattaallaa-sketchPublished by GitHub account kaattaallaa-sketchv0.8.1Updated Oct 24, 2026

Check Exa, BlockRun, OneSource, Apify and other x402 dependencies before invoking or paying.

The publisher's own server: check.tattoo: tattoo size and placement guide

VerifiedStreamable HTTPWeb executableFinanceDeveloper Tools

Overview

AI-generated overview

Lets an assistant check x402 payment dependencies such as Exa, BlockRun, OneSource and Apify before invoking or paying them.

What you can do
AgentObserver is a remote MCP endpoint whose stated purpose is to check x402 dependencies before an assistant invokes or pays them. The registry description names Exa, BlockRun, OneSource and Apify as examples of the dependencies it covers. No tool list is published, so the exact operations it exposes are not documented in the available material.
When to use it
Consider it when an assistant workflow calls paid x402 services and you want a pre-flight check before money is spent. It is aimed at setups that already depend on x402-style paid endpoints and want to verify them first.
Requirements
It runs as a remote streamable HTTP endpoint; no package, environment variable or header is declared. The manifest declares no authentication, so no credential is documented as required. Network access to the remote endpoint is needed.
Before you install
The server concerns payment-related dependencies, so any use that leads to invoking or paying a service can spend money. No authentication is declared and no tool list is published, so what the endpoint does with a request is not documented here. Treat the provider and homepage as unverified third-party sources.

Installation

In SourceWeft

  1. Open AgentObserver - Check x402 Dependencies Before Paying in the dashboard and add it to a workspace.
  2. 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/io.github.kaattaallaa-sketch%2Fagentobserver/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": {
    "agentobserver-check-x402-dependencies-be": {
      "type": "http",
      "url": "https://icqzbuuix6e4bed2stnnboqcti.srv.us/mcp"
    }
  }
}

Tools

0
SourceWeft has not read this server's tools yet.

Version history

3
  1. v0.8.1LatestSep 23, 2026
  2. v0.7.2Sep 22, 2026
  3. v0.7.0Sep 22, 2026

Score

67% 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

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • 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.

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