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

Discovers and proxies 500+ MCP servers and A2A tools via a single meta-router endpoint with 85% token compression and a Prompt-Guard firewall.

## Facts

- Endpoint: GET https://mcp-security.agentdiet.dev/v1/broker/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mcp-security.agentdiet.dev
- Website: https://mcp-security.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-f1e810da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QgxVrX9iS8ITcIVuf4zi_

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 mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-f1e810da
```

Example prompt: Search the MCP tool index for anything that can handle SEC filings or company enrichment — I want to find the right tool to route my agent to without connecting to dozens of servers separately.

## When to prefer this

Choose this endpoint when an agent needs to discover and route to one of many MCP servers or A2A tools without managing individual connections, especially when token budget is constrained or when safety screening of upstream tools is required. It is particularly useful for swarm architectures or orchestrators that need dynamic tool selection at runtime.

## Known failure modes

- Query too vague returns broad or irrelevant tool matches
- Endpoint URL verification fails if the target is offline or non-compliant
- Firewall blocks results for endpoints flagged as prompt-injection risks
- Empty results if no indexed tool matches the capability query
- Timeout if the meta-router cannot reach upstream MCP servers in time

## 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://mcp-security.agentdiet.dev/v1/broker/execute)

## Output

Returns a ranked list of matching MCP servers or A2A tools with compressed metadata (85% token reduction), safety flags from the Prompt-Guard firewall, and routing information for the best-matching capability given the query.

## 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/mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-f1e810da/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-security.agentdiet.dev](https://www.zero.xyz/host/mcp-security.agentdiet.dev/llms.txt)