# 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 tools via a single connection, with token compression and prompt injection firewall

## Facts

- Endpoint: GET https://agentdiet.dev/v1/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-cdf95e35
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MS6taZDXxAI9N5L9dgO4F

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-cdf95e35
```

Example prompt: Search the MCP tool index for agents that can handle SEC filings — find me the best available tool and route my request through the safe proxy.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover and connect to the right MCP server or A2A tool from a large index without managing multiple connections. Particularly useful when the specific capability tool is unknown and needs to be searched, or when token budget is constrained and compression is needed, or when a prompt injection firewall is required for safe tool routing.

## Known failure modes

- Query returns no matching tools if capability is too niche or not indexed
- Prompt injection attempt blocked by Prompt-Guard firewall with rejection notice
- Payment required error (HTTP 402) if USDC payment not attached
- Endpoint URL verification returns invalid or unreachable status
- Token compression may lose detail for highly structured schemas

## 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/execute)

## Output

Returns a ranked list of matching MCP servers or A2A tools with metadata, routing information, and safe-proxy access details. Includes tool capabilities, endpoint URLs, and compressed schema information with up to 85% token reduction.

## 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-cdf95e35/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)