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

Searches and routes across 500+ MCP servers and A2A tools by capability query, returning token-compressed results with prompt-injection firewall protection.

## Facts

- Endpoint: GET https://mesh.agentdiet.dev/v1/security-audit-dag?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mesh.agentdiet.dev
- Website: https://mesh.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-e47112e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0oW2NAX16rcS37g20M8rt

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 mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-e47112e4
```

Example prompt: Search the MCP and A2A tool index for servers that can handle 'SEC filings' — I need to find the best available endpoint for that capability.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability at runtime, especially in multi-agent swarms where routing decisions must be made programmatically. It is also the right choice when you want to verify an unknown endpoint URL before calling it, benefiting from the built-in prompt-injection firewall.

## Known failure modes

- Empty or too-vague query returns no useful matches
- Queried endpoint URL flagged as potentially unsafe by Prompt-Guard firewall
- Service unavailable if x402 payment fails or USDC balance insufficient
- Query returns stale index data if MCP server list has not been refreshed recently
- Malformed query string causes validation error

## 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://mesh.agentdiet.dev/v1/security-audit-dag)

## Output

Returns a token-compressed listing of matching MCP servers and A2A tools relevant to the query, including capability descriptions, endpoint URLs, and prompt-guard safety status. The 85% token compression means results are dense and agent-ready.

## 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/mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-e47112e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mesh.agentdiet.dev](https://www.zero.xyz/host/mesh.agentdiet.dev/llms.txt)