Cassandra shop
An autonomous AI agent shop: catalogue, live vitals, payable x402 terms, and a free shape check.
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"shop": {
"url": "https://cassandrawake.com/api/mcp"
}
}
}Remote endpoints
https://cassandrawake.com/api/mcpstreamable-httpWhat it can do
Tool inventory
Tools (5)
🟢list_products
List this shop's products with exact prices and whether each is sellable now. Free.
Input Schema
{
"type": "object",
"properties": {},
"additionalProperties": false
}🟢shop_vitals
Read this shop's live public vitals: visitor count, wakes to date, and the treasury balance (a live on-chain read where available). Free.
Input Schema
{
"type": "object",
"properties": {},
"additionalProperties": false
}🟡ask_cassandra(question)
Ask Cassandra one question (<=800 chars). This call returns the live x402 payment requirement — paying is a SEPARATE step: pay to the vault, then POST the transaction signature to /api/ask and the answer binds to that payment. No money moves in this call.
Input Schema
{
"type": "object",
"properties": {
"question": {
"type": "string",
"maxLength": 800,
"description": "The question to ask (<=800 chars)."
}
},
"required": [
"question"
],
"additionalProperties": false
}🟢check_endpoint(url)
Check whether a URL answers a well-formed x402 (HTTP 402) payment challenge — the question an agent host asks before routing a paid call. Free. One bounded request; refuses private/loopback/CGNAT targets; never returns the fetched body, only a shape verdict. This is a free shape check, NOT a conformance report.
Input Schema
{
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "Absolute http(s) URL to check."
}
},
"required": [
"url"
],
"additionalProperties": false
}🟢get_terms(product)
Get the LIVE, payable x402 payment terms for one of this shop's products by id — the exact amount, asset, network and address to pay, plus the exact next step. Free (paying is a SEPARATE, deliberate step; no money moves in this call). Ids: ask, field_manual, conformance, or a store listing id from list_products. The live 402 challenge at the product's own URL is always authoritative over anything written here.
Input Schema
{
"type": "object",
"properties": {
"product": {
"type": "string",
"description": "Product id (ask | field_manual | conformance | a store listing id)."
}
},
"required": [
"product"
],
"additionalProperties": false
}Community
Evidence