# 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 2026-10-23).

Searches and routes queries across 500+ indexed MCP servers and A2A tools via a single meta-router endpoint with token compression and prompt-injection firewall.

## Facts

- Endpoint: POST https://shopify-spy.agentdiet.dev/v1/broker/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-048ecf65
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__V7yJx0biHCpuqq-Mfvue

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-048ecf65 -d '<json body>'
```

Example prompt: Search the MCP tool index for any servers that handle SEC filings or company enrichment — I want to find which tools are available and route my query there.

## When to prefer this

Choose this endpoint when you need to discover and route to one of many MCP servers or A2A tools from a single connection point, especially when token efficiency matters or when you need prompt-injection protection on returned tool outputs. Prefer it over direct MCP connections when you don't know which specific server hosts a capability, or when building multi-tool swarm agents that need unified routing.

## Known failure modes

- Query too vague — returns no matches or low-confidence tool listings
- Endpoint URL verification fails for unknown or offline MCP servers
- Payment not attached — x402 payment required error returned
- Rate limiting or idempotency key conflict on retries
- Tool index returns stale results if upstream MCP servers are offline

## 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 matched set of MCP servers or A2A tools relevant to the query, with token-compressed responses (up to 85% reduction) and Prompt-Guard firewall applied to filter unsafe or injected content.

## 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-048ecf65/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)