# 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 mcp-security.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches and routes across 500+ indexed MCP servers and A2A tools using a single connection, with token compression and prompt-injection firewall.

## Facts

- Endpoint: GET https://mcp-security.agentdiet.dev/v1/crypto-alpha-dag?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mcp-security.agentdiet.dev
- Website: https://mcp-security.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-5960acd5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cQ9n7b0HOCn_1ccNG7Q0U

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 mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-5960acd5
```

Example prompt: Search the MCP tool index for any servers that handle 'SEC filings' or 'company enrichment' — I want to find the best available endpoint for pulling public company financial data into my agent pipeline.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to call for a given capability, rather than hardcoding a specific endpoint. Especially useful for swarm-style agent architectures that need to route tasks to the best available tool, or when you want to verify an unknown endpoint URL for prompt-injection safety before calling it.

## Known failure modes

- Empty or too-short query returns no results
- Query too vague returns low-relevance matches
- Endpoint URL provided but not indexed returns not-found result
- Rate limit or payment failure returns 402 error
- Malformed query string returns 400 validation 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://mcp-security.agentdiet.dev/v1/crypto-alpha-dag)

## Output

Returns a ranked list of matching MCP servers or A2A tools relevant to the capability query, including endpoint metadata, token-compressed summaries, and Prompt-Guard safety flags. If a URL is provided, returns verification and safety status for that specific endpoint.

## 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/mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-5960acd5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-security.agentdiet.dev](https://www.zero.xyz/host/mcp-security.agentdiet.dev/llms.txt)