# 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 and routes to 500+ MCP servers and A2A tools via a single meta-router connection with token compression and prompt-injection firewall

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/x402-gateway?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-fd057751
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qt34XzMANKOZg_USNqy9F

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-fd057751
```

Example prompt: Search the MCP meta-router for any indexed tools related to 'github security' — I want to find available agents or servers I can connect to for repository auditing.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover new MCP servers or A2A tools at runtime, especially when the right downstream tool is not known in advance. Useful for swarm orchestration pipelines that need to route tasks to the best-fit agent tool from a large indexed catalog. Prefer this over hardcoded tool registries when you need breadth (500+ tools), token-efficient metadata, or built-in prompt-injection protection.

## Known failure modes

- Empty query string returns validation error
- No tools match the search query — returns empty result set
- Endpoint URL verification fails if URL is not indexed
- Rate limiting or payment failure under x402 protocol returns 402 response
- Malformed query may return irrelevant or zero results

## 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/x402-gateway)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, including compressed metadata about each tool's capabilities, endpoint URLs, and safety status from the Prompt-Guard firewall layer.

## 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-fd057751/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)