# 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 discovers capabilities across 500+ MCP servers and A2A tools via a single meta-router endpoint with token compression and prompt-injection firewall

## Facts

- Endpoint: GET https://mesh.agentdiet.dev/v1/tool-broker?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-8502fb78
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aqJGYKwf3OL6VUFUv1SVr

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-8502fb78
```

Example prompt: Search the AgentDiet tool broker for any MCP servers or A2A tools that handle SEC filings and company enrichment — I need to find the best available capability for that.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover and route to specialized tools or MCP servers at runtime without hardcoding dozens of individual API integrations. Ideal for swarm orchestrators, meta-agents, and agent frameworks that need a single connection point to 500+ tools with built-in prompt-injection protection and token-efficient responses.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for obscure or misspelled capability names
- Endpoint URL verification returns not-found if URL is not indexed
- Rate limiting or payment failure when x402 micropayment is not correctly handled
- Overly broad queries may return too many results without useful ranking

## 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/tool-broker)

## Output

Returns a compressed, token-efficient list of matching MCP servers and A2A tools relevant to the query, including capability descriptions, endpoint URLs, and metadata — filtered through a Prompt-Guard firewall to prevent injection attacks.

## 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-8502fb78/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)