# 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 a meta-index of 500+ MCP servers and A2A tools by capability query, returning matched endpoints with token-compressed results through a prompt-injection firewall.

## Facts

- Endpoint: POST https://shopify-spy.agentdiet.dev/v1/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-c1fef568
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__amM84N7p6t12-ws15Rq1

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-c1fef568 -d '<json body>'
```

Example prompt: Search the MCP tool index for any servers or A2A endpoints that can handle 'SEC filings' — I need to find what's available so I can route my agent to the right one.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool is best suited for a given task at runtime, especially when the agent does not have a hard-coded tool list. Prefer this over manually curated tool lists when working across 500+ tools or when you need the built-in prompt-injection firewall to sanitize discovered endpoints before use.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for obscure or misspelled capability queries
- Firewall may flag or block results containing suspicious prompt patterns
- Timeout if the meta-index is slow to respond for broad queries
- Malformed endpoint URL input when using URL-verification mode returns an error

## 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/execute)

## Output

Returns a list of matched MCP servers or A2A tool endpoints relevant to the capability query, with metadata and compressed descriptions, filtered through the Prompt-Guard firewall to remove injection risks.

## 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-c1fef568/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)