# 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 workflows.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

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

## Facts

- Endpoint: POST https://workflows.agentdiet.dev/api/mcp/audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-9eb9db1c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aNhI5AR8lWbw-4eDqVop_

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 workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-9eb9db1c -d '<json body>'
```

Example prompt: Search your MCP tool index for servers that can handle 'SEC filings' and route me to the best one — I need compressed, agent-ready results with the prompt firewall enabled.

## When to prefer this

Use this endpoint when an AI agent needs to discover the right tool or MCP server from a large index without managing individual connections, especially when context window budget is tight (85% compression) or when security screening of third-party endpoints is required. Prefer over manual tool registries when the agent needs single-connection access to 500+ tools and automated safe-routing.

## Known failure modes

- Query too vague — returns no matching tools or low-confidence results
- Endpoint URL verification fails if the target is offline or non-compliant
- Token compression may drop nuanced metadata for niche or poorly-described tools
- Rate limiting or payment failure (HTTP 402) if USDC balance is insufficient
- Prompt injection attempts blocked by firewall, returning a rejection rather than results

## 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://workflows.agentdiet.dev/api/mcp/audit)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, with 85% token-compressed metadata, safety/firewall verdicts from Prompt-Guard, and routing information to connect to the best-fit endpoint — all via a single 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/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-9eb9db1c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)