# 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 routes queries across 500+ indexed MCP servers and A2A agent tools with token compression and prompt injection firewall protection.

## Facts

- Endpoint: GET https://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: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-f46f68f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L-8GKLveor4SoRvLSZIzN

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-f46f68f4
```

Example prompt: Can you search the MCP tool index for any servers or A2A agents that handle SEC filings or company enrichment — I need to route my next task through the right one?

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool best matches a capability at runtime, rather than hardcoding tool connections. Particularly useful for swarm architectures that must route tasks to the right specialist tool, or when you want prompt injection firewall protection layered over external tool calls. Prefer over manual tool registries when you need to search across 500+ tools simultaneously with token-efficient responses.

## Known failure modes

- Empty query string returns validation error
- Query matches no indexed tools — returns empty result set
- Endpoint URL provided for verification may be unreachable or not indexed
- Token compression or firewall layer may introduce latency spikes
- x402 payment failure if USDC balance is insufficient
- Overly broad queries may return 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/security-audit-dag)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, including metadata about each endpoint, token-compressed summaries, security/firewall status, and routing recommendations. May also return verification results if an endpoint URL is provided as input.

## 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-f46f68f4/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)