# 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 across 500+ MCP servers and A2A tools via a single connection, with token compression and prompt-injection firewall.

## Facts

- Endpoint: GET https://mesh.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: 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-ee60b06e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qf7QbAoOJfLLjrBAiq44e

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-ee60b06e
```

Example prompt: Search the universal MCP gateway for tools that handle SEC filings retrieval — I want to find the best available A2A endpoint for that capability.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to delegate a task to, especially when the agent doesn't know the exact backend endpoint in advance. It is particularly valuable when operating across a large heterogeneous tool ecosystem (500+), when token budget is tight (85% compression), or when untrusted tool responses need firewall protection.

## Known failure modes

- Query string too short or empty — returns validation error
- No matching tools found for the capability query — returns empty result set
- Endpoint URL not indexed or unrecognized — returns no match
- Service temporarily unavailable — returns 5xx error
- Payment not completed (x402) — request blocked before processing

## 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/universal-mcp-gateway)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, including endpoint metadata, compressed descriptions, and safety/firewall status — with up to 85% token reduction compared to raw discovery.

## 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-ee60b06e/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)