# 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 to 500+ MCP servers and A2A agent tools via a single meta-router connection with token compression and prompt-injection firewall

## Facts

- Endpoint: GET https://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: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-2fe719c9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XVoJBNPCXrIlZrupyivpg

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-2fe719c9
```

Example prompt: Search the MCP and A2A tool index for any available capabilities related to 'SEC filings' so I can route my agent to the right tool without connecting to dozens of servers individually.

## When to prefer this

Choose this endpoint when your agent needs to discover or route to one of many MCP servers or A2A tools without maintaining individual connections to each — especially valuable when you want token-compressed tool manifests, a single authenticated connection point, or built-in prompt-injection protection before delegating to an external tool. Prefer over manually curating your own MCP index or connecting directly to untrusted agent endpoints.

## Known failure modes

- No matching tools found for the given query — returns empty result set
- Query too vague to resolve to specific tools — may return low-relevance results
- Endpoint URL verification fails if the target is unreachable or flagged by Prompt-Guard
- Payment not processed (x402 / USDC) — returns 402 with payment instructions
- Rate limit exceeded — returns 429 error

## 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/broker/execute)

## Output

Returns a matched list of MCP servers or A2A tools relevant to the query, with compressed tool manifests (85% token reduction), safety-verified endpoint metadata, and routing information needed to invoke the selected capability — all through a single broker connection.

## 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-2fe719c9/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)