# 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-intel.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 agent tools by capability query, returning compressed, firewall-filtered results for agent routing

## Facts

- Endpoint: GET https://shopify-intel.agentdiet.dev/v1/tool-search?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: shopify-intel.agentdiet.dev
- Website: https://shopify-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/shopify-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-871087f6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kFmayZVMX7a-STdC21egV

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-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-871087f6
```

Example prompt: Search the MCP and A2A tool index for capabilities related to 'SEC filings' — I need to find an agent tool that can pull company filing data, and I want the results filtered through the Prompt-Guard firewall.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to call for a given capability at runtime, especially when the agent ecosystem is large (500+ tools) and token budget is constrained. Prefer this over hardcoded tool registries when the available toolset changes frequently or when prompt-injection safety filtering on tool metadata is required.

## Known failure modes

- Empty or whitespace query returns validation error
- No matching tools found for an obscure capability query returns empty results
- Endpoint URL verification query for a non-existent endpoint returns null or not-found
- Rate limiting or payment failure (x402) blocks the call
- Firewall (Prompt-Guard) may filter or reject queries containing prompt-injection patterns

## 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-intel.agentdiet.dev/v1/tool-search)

## Output

Returns a compressed list of matching MCP server entries and A2A tool descriptors relevant to the query, filtered through a Prompt-Guard firewall, with up to 85% token compression applied to the metadata payload.

## 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-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-871087f6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shopify-intel.agentdiet.dev](https://www.zero.xyz/host/shopify-intel.agentdiet.dev/llms.txt)