# 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 across 500+ indexed MCP servers and A2A tools using a single connection, with built-in token compression and prompt-injection firewall

## Facts

- Endpoint: GET https://agentdiet.dev/v1/universal-mcp-gateway?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-a1985fcf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5DUJWJEQQ8bbfqXvtHndL

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-a1985fcf
```

Example prompt: Search the universal MCP gateway for tools that handle 'SEC filings' and tell me which ones are available and safe to use.

## When to prefer this

Choose this endpoint when you need a single connection to discover, compare, or safely route to any of 500+ MCP or A2A tools without manually cataloging individual endpoints. Especially useful when you want built-in prompt-injection protection on tool responses and 85% token compression to minimize LLM context costs.

## Known failure modes

- Empty or too-vague query returns no matches
- Unrecognized endpoint URL fails verification check
- Query times out if indexing is delayed or stale
- Payment not processed (x402 402 response) if micropayment fails
- Response schema is unspecified — output structure may vary per query type

## 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/universal-mcp-gateway)

## Output

Returns a structured object listing matching MCP servers and A2A tools for the query, including tool metadata, routing information, safety status from the Prompt-Guard firewall, and token-compressed capability descriptions to minimize context usage.

## 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-a1985fcf/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)