# 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 queries across 500+ indexed MCP servers and A2A tools via a single meta-router connection with token compression and prompt firewall protection.

## Facts

- Endpoint: GET https://agentdiet.dev/v1/a2a-mesh?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-82e84e6a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__I2iDlvP1xBZBk2WhMqaB

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-82e84e6a
```

Example prompt: Search the A2A mesh for MCP tools that handle SEC filings and company enrichment, and route me to the best match.

## When to prefer this

Choose this endpoint when an AI agent needs to discover or route to one of hundreds of MCP servers or A2A tools without maintaining separate connections to each; ideal when you need token-efficient tool discovery with built-in prompt safety filtering across a broad index of agent capabilities.

## Known failure modes

- Empty query string returns validation error
- Query too vague returns no matching tools
- Endpoint URL verification fails if target is offline
- Rate limiting or payment failure if x402 payment not settled
- Prompt-Guard firewall may block queries flagged as 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://agentdiet.dev/v1/a2a-mesh)

## Output

Returns a ranked list of matching MCP servers or A2A tool endpoints relevant to the search query, including capability metadata and routing information, filtered through a Prompt-Guard firewall with 85% token compression applied.

## 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-82e84e6a/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)