# 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 meta-index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results for agent tool routing

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/broker/execute?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-ccc13c8f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_E0xIyNJc68reBaSg8adfS

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-ccc13c8f
```

Example prompt: Search the MCP and A2A tool index for any available tools that handle SEC filings or company enrichment — I need to find the right capability to route my agent to.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover and route to one of many MCP or A2A tool endpoints without hardcoding integrations, especially when token efficiency (85% compression) and prompt-injection safety (Prompt-Guard) are priorities. Prefer over manual MCP directory lookups or building a custom tool registry from scratch.

## Known failure modes

- Empty query string returns validation error (minLength:1 required)
- No matching tools found for obscure capability query returns empty result set
- Upstream MCP server unavailable causes partial or degraded index results
- Payment not completed via x402 returns 402 Payment Required
- Firewall blocks query deemed prompt-injection attempt

## 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/execute)

## Output

Returns a filtered, token-compressed list of matching MCP servers or A2A tool endpoints from the meta-index, along with capability metadata, filtered through the Prompt-Guard firewall to remove malicious or non-compliant results.

## 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-ccc13c8f/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)