# 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 whale-momentum.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 tools by capability query, returning compressed, firewall-screened results via a single meta-router connection

## Facts

- Endpoint: GET https://whale-momentum.agentdiet.dev/v1/broker/catalog?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: whale-momentum.agentdiet.dev
- Website: https://whale-momentum.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/whale-momentum-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-22d0e1bc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9U729Cz9clYsRhMt11Usa

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 whale-momentum-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-22d0e1bc
```

Example prompt: Search the agentdiet broker catalog for MCP tools that handle SEC filings or company enrichment — I want to find a safe-proxy-compatible endpoint I can wire into my agent swarm.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover and route to MCP servers or A2A tools without maintaining its own registry. Ideal for agent swarms that need a single connection point to 500+ tools with built-in token compression, prompt injection protection, and x402 payment compatibility. Prefer over manual tool configuration when capability needs are dynamic or unknown at build time.

## Known failure modes

- Missing or empty 'query' parameter returns a 400 validation error
- Query matches no indexed tools, returning an empty result set
- Payment not satisfied (HTTP 402) if x402 micropayment not included
- Upstream MCP server index temporarily unavailable, causing partial or degraded results
- Overly broad query returns too many low-relevance 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://whale-momentum.agentdiet.dev/v1/broker/catalog)

## Output

A catalog response listing matching MCP servers and A2A tools relevant to the query, with tool metadata, capability descriptors, and compressed representations (85% token reduction) screened through the Prompt-Guard firewall. Results include endpoint URLs, supported protocols (x402, IETF MPP, MCP), and tool capability summaries.

## 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/whale-momentum-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-22d0e1bc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whale-momentum.agentdiet.dev](https://www.zero.xyz/host/whale-momentum.agentdiet.dev/llms.txt)