# 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 2026-10-28).

Searches and routes queries across 500+ MCP servers and A2A tools through a single meta-router endpoint with token compression and prompt injection protection

## Facts

- Endpoint: POST https://agentdiet.dev/v1/bundle-execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- 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-0eb2a259
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ncxftPqfyO6xxVukN7BJ3

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-0eb2a259 -d '<json body>'
```

Example prompt: Search across all available MCP servers and A2A tools for anything that can do 'SEC filings' or 'company enrichment' — I want to find the best tool for that capability in one shot.

## When to prefer this

Choose this endpoint when an AI agent needs to discover and route to the right tool or MCP server without knowing in advance which one to call — especially useful for dynamic agent orchestration, swarm setups, or when building agents that need to self-select capabilities at runtime. Prefer over direct MCP calls when you want a single connection point, token-compressed responses, or built-in prompt injection protection.

## Known failure modes

- Query too vague or short — no matching tools returned
- Endpoint URL verification fails if the URL is unreachable or not indexed
- Rate limit or payment failure if x402 micropayment is not properly handled
- Prompt-Guard firewall blocks query if it is flagged as a prompt injection attempt
- Empty result set if queried capability is not covered by indexed tools

## 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/bundle-execute)

## Output

Returns a structured bundle of matching MCP servers and A2A tools relevant to the query, with compressed metadata (85% token reduction), tool capability descriptions, endpoint references, and safe-proxied routing information filtered through the Prompt-Guard firewall.

## 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-0eb2a259/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)