# 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 audits 500+ indexed MCP servers and A2A tools by capability query, with 85% token compression and prompt-injection firewall protection.

## Facts

- Endpoint: GET https://agentdiet.dev/api/mcp/audit?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-0cbcf4a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wPgaGDhHdWO6tLIQf0qWq

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-0cbcf4a8
```

Example prompt: Search the MCP tool index for anything that handles 'SEC filings' so I can find a safe, compressed-response endpoint to use in my agent pipeline.

## When to prefer this

Choose this endpoint when you need to discover, compare, or verify MCP/A2A tools across a broad index of 500+ servers without making individual connections to each — especially when token budget is a concern (85% compression) or when you want a safety-screened proxy layer before connecting an untrusted tool to your agent pipeline.

## Known failure modes

- Empty query string returns validation error (query is required, minLength 1)
- No matching tools found for obscure capability query returns empty result set
- Endpoint URL audit may time out if the target server is unresponsive
- Payment required (HTTP 402) if x402 micropayment not attached at $0.01 per call
- Malformed endpoint URL may return parse error rather than audit result

## 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/api/mcp/audit)

## Output

Returns a structured object listing matching MCP servers or A2A tools ranked by relevance to the query, with metadata about each tool's capabilities, safety status (Prompt-Guard firewall check), and compressed descriptions. When an endpoint URL is submitted, returns an audit result for that specific endpoint.

## 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-0cbcf4a8/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)