# Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router — Broker Catalog

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router — Broker Catalog is a paid API for AI agents from shopify-intel.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-22).

Searches a meta-index of 500+ MCP servers and A2A tools by capability query and returns matching endpoints with token-compressed results and prompt-firewall safety.

## Facts

- Endpoint: GET https://shopify-intel.agentdiet.dev/v1/broker/catalog?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-22
- 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-4b0280d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G2cwyXgUm6EWhYXWrQQVb

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-4b0280d4
```

Example prompt: Search the MCP broker catalog for tools that handle 'SEC filings' and show me what endpoints are available.

## When to prefer this

Use this endpoint when an agent needs to dynamically discover which MCP servers or A2A tools support a given capability at runtime, rather than hardcoding tool URLs. Especially useful for swarm architectures that need to route tasks to the best available external agent or MCP endpoint. Prefer this over manual tool registries when the ecosystem of available tools is large and changes frequently.

## Known failure modes

- Missing or empty 'query' parameter returns a validation error
- Query matches no indexed endpoints — returns empty result set
- Upstream MCP servers may be stale or unavailable, causing incomplete catalog results
- x402 payment failure if USDC balance is insufficient
- Overly broad queries may return too many loosely matched tools

## 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/broker/catalog)

## Output

A catalog listing of matched MCP servers and A2A tools relevant to the capability query, with token-compressed metadata describing each endpoint's capabilities, supported schemas, and routing information, filtered through a prompt-guard firewall for safety.

## 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-4b0280d4/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)