# 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 agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches and discovers capabilities across 500+ MCP servers and A2A tools via a single meta-router endpoint with token compression and prompt firewall protection

## Facts

- Endpoint: GET https://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: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-ecb53f00
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2m7qNMHsuwcR4we9ln0AO

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 agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-ecb53f00
```

Example prompt: Search the AgentDiet catalog for any MCP servers or A2A tools that handle SEC filings and company enrichment — I want to see what's available via the meta-router.

## When to prefer this

Choose this endpoint when you need a single connection point to discover, verify, or route across a large corpus of MCP servers and A2A tools without managing individual server connections. Ideal for agents that need to dynamically discover capabilities at runtime rather than hardcoding tool integrations. Prefer this over individual MCP server queries when breadth of discovery matters and token efficiency is important.

## Known failure modes

- Missing or empty query parameter returns validation error
- Query matches no indexed tools and returns empty results
- Upstream MCP server unavailable causing partial catalog response
- Rate limiting or payment failure via x402 protocol
- Overly broad query returns too many low-relevance 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://agentdiet.dev/v1/broker/catalog)

## Output

Returns a catalog of matching MCP servers and A2A tools from the 500+ indexed providers, including capability descriptions, endpoint URLs, and metadata compressed for token efficiency. Results are filtered through the 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/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-ecb53f00/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdiet.dev](https://www.zero.xyz/host/agentdiet.dev/llms.txt)