# 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 2026-10-28).

Meta-router that searches 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results through a single connection

## Facts

- Endpoint: POST https://shopify-spy.agentdiet.dev/v1/swarm-execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- 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-43a3d991
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Lm43VRv-WGhgBFOdtpavc

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-43a3d991 -d '<json body>'
```

Example prompt: Search the swarm router for MCP tools that handle GitHub security audits — find me the best matching tools from the index of 500+ servers.

## When to prefer this

Use this endpoint when you need to discover which MCP servers or A2A tools exist for a given capability without knowing the specific endpoint upfront, especially when you want a single connection that covers 500+ servers with built-in safety filtering and token compression rather than managing individual server connections.

## Known failure modes

- Empty query string returns 400 validation error
- No matching tools found returns empty result set
- Prompt-Guard firewall blocks query if it resembles injection attack
- Payment required (HTTP 402) if x402 credits are exhausted
- Upstream MCP server unreachable causes partial result or timeout

## 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/swarm-execute)

## Output

Returns a filtered, token-compressed list of matching MCP servers or A2A tools from the 500+ server index, with metadata about each tool's capabilities, filtered through the Prompt-Guard firewall to remove malicious payloads before delivery.

## 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-43a3d991/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)