# Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router is a paid API for AI agents from shopify-spy.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches a catalog of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-screened tool metadata for agent routing

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/broker/catalog?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: shopify-spy.agentdiet.dev
- Website: https://shopify-spy.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/shopify-spy-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-c3425a47
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iF-mSuJ5ZbcJy30Io113x

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability shopify-spy-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-c3425a47
```

Example prompt: Search the agentdiet broker catalog for tools that can do SEC filings and tell me what MCP servers or A2A agents are available for that capability.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover and route to the right MCP server or A2A tool for a capability it doesn't already have wired in — especially useful for swarm orchestration or when building meta-agents that need to delegate subtasks to specialized tools. Prefer this over hardcoded tool registries when the tool landscape changes frequently or when you need a single connection point to 500+ endpoints with built-in prompt safety filtering.

## Known failure modes

- Empty query string returns validation error
- No matching tools found returns empty catalog result
- Upstream MCP server unavailability may cause partial results
- Malformed query may return unexpected or irrelevant tool matches
- Payment failure via x402 returns 402 status blocking access

## How this service works

Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall. (Live x402 v2, IETF MPP & MCP endpoint at https://shopify-spy.agentdiet.dev/v1/broker/catalog)

## Output

Returns a compressed catalog of matching MCP servers and A2A tools, including tool names, capability descriptions, endpoint URLs, and routing metadata — filtered through a Prompt-Guard firewall and compressed to reduce token usage by up to 85%.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "query": {
   "type": "string",
   "minLength": 1,
   "description": "Capability search query (e.g. 'context compression', 'github security', 'sec filings', 'company enrichment') or endpoint URL to verify"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/shopify-spy-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-c3425a47/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shopify-spy.agentdiet.dev](https://www.zero.xyz/host/shopify-spy.agentdiet.dev/llms.txt)