# 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, proxies, and routes requests across 500+ MCP servers and A2A tools via a single connection with token compression and prompt firewall protection.

## Facts

- Endpoint: GET https://mcp-security.agentdiet.dev/v1/workflows/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-58935d83
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4TcANNYKh09mMabTd-JEU

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-58935d83
```

Example prompt: Search across MCP servers and A2A tools for anything that can handle SEC filings or company enrichment — I want to find and route through the best available tool with token-compressed results.

## When to prefer this

Choose this endpoint when an agent needs to discover and route across the MCP/A2A ecosystem without maintaining individual connections to hundreds of servers — especially when prompt injection safety, token budget constraints, or swarm orchestration across multiple tools is a priority.

## Known failure modes

- Query too vague returns zero or low-relevance tool matches
- Endpoint URL verification fails if the target is offline or non-compliant
- Prompt-Guard firewall may block or flag queries containing injection-like patterns
- Token compression may lose edge-case detail for highly technical queries
- HTTP 402 payment required if caller does not supply x402 credentials

## 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/workflows/execute)

## Output

Returns a structured object listing matching MCP servers or A2A tools for the query, with tool metadata, capability summaries compressed to ~85% fewer tokens, and any prompt-injection firewall flags raised during routing.

## 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-58935d83/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)