# 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 across 500+ indexed MCP servers and A2A tools via a single meta-router endpoint with built-in prompt-injection firewall and token compression.

## Facts

- Endpoint: POST https://shopify-spy.agentdiet.dev/v1/b2b-osint-dag?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-3d11d28a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I_ctI3tuiIOVsqWZhMm9G

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-3d11d28a -d '<json body>'
```

Example prompt: Search your tool index for an MCP server that handles GitHub security audits and route me to the best match.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover and route to one of hundreds of specialized MCP servers or A2A tools without maintaining its own registry. It is especially useful for agent swarms that need a single meta-connection point with built-in security (Prompt-Guard) and token efficiency (85% compression), rather than hardcoding individual tool endpoints.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for the given capability query
- Upstream MCP server unreachable, partial results returned
- Rate limit exceeded due to high-frequency calls
- Payment required (HTTP 402) if x402 USDC micro-payment not included

## 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/b2b-osint-dag)

## Output

Returns metadata about matching MCP servers or A2A tools that satisfy the capability query, including routing information, endpoint details, and compressed tool descriptions. The response is token-compressed (up to 85%) and pre-screened by the built-in Prompt-Guard firewall.

## 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-3d11d28a/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)