# 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 queries across 500+ indexed MCP servers and A2A tools, returning token-compressed results with prompt-injection firewall protection.

## Facts

- Endpoint: GET https://mesh.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: 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-a14f906e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nuDo_o4ZvjByETqFJNTrN

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-a14f906e
```

Example prompt: Search the MCP meta-router for tools that can do 'company enrichment' — I want to find and safely proxy a capable A2A endpoint from the 500+ indexed servers.

## When to prefer this

Choose this endpoint when an AI agent needs to discover, search, or route to external MCP servers or A2A tools without setting up individual connections to hundreds of services. Especially valuable when token efficiency matters (85% compression), when operating in multi-agent swarm architectures, or when you need a firewall-protected proxy layer between agents and untrusted external tools. Prefer this over direct tool discovery when you want a single-connection meta-router rather than managing 500+ integrations manually.

## Known failure modes

- Missing or empty query string returns a validation error
- Query too vague returns empty or low-confidence results
- Provided endpoint URL is unknown to the index and returns unverified status
- Rate limiting or payment failure (x402) blocks the request
- Firewall may flag suspicious queries as potential prompt injection attempts

## 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/broker/execute)

## Output

Returns a compressed, token-efficient list of matching MCP servers or A2A tools from a 500+ server index, including endpoint metadata, capability summaries, and safety status from the Prompt-Guard firewall. If an endpoint URL is provided, returns verification and trust information 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/mesh-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-a14f906e/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)