# 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 an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results via a single meta-router connection.

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/mesh/dispatch?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-c5dd7176
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_REeCtZIb9tXuU8hspUjb9

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-c5dd7176
```

Example prompt: Search the agentdiet mesh for MCP servers or A2A tools that handle 'SEC filings' and show me the top matches with their endpoints.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover the right MCP server or A2A tool for a capability it doesn't already know, especially when you want a single-connection interface to a large index, token-compressed results, and built-in prompt firewall protection. Prefer it over manually curated tool lists when the target capability space is broad or rapidly changing.

## Known failure modes

- Empty or too-generic query returns no useful matches
- Endpoint URL verification fails if the target is offline or non-compliant
- Query string shorter than 1 character is rejected with validation error
- Index may not include very recently registered MCP servers
- Payment required (HTTP 402) if x402 credentials are not provided

## 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/mesh/dispatch)

## Output

Returns a structured object listing matching MCP servers or A2A tools from the 500+ index, with compressed metadata (85% token reduction applied), endpoint URLs, capability tags, and Prompt-Guard firewall screening results. May also return compliance or verification status if an endpoint URL was provided as the query.

## 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-c5dd7176/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)