# 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 2026-10-21).

Searches and routes to 500+ MCP servers and A2A tools via a single meta-router endpoint with token compression and prompt firewall protection

## Facts

- Endpoint: GET https://workflows.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: 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-2332ae5a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZoIJWEdQc2kN9EzIo8lN-

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-2332ae5a
```

Example prompt: Search the MCP tool index for agents or servers that handle SEC filings retrieval — I want to find the best available tool and route through it using a single connection.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which of 500+ MCP servers or A2A tools supports a given capability, rather than hardcoding individual tool connections. Ideal for swarm architectures where agents must self-select tools at runtime. Also useful for verifying whether a specific tool endpoint is live before routing traffic to it.

## Known failure modes

- Empty or too-broad query returns too many low-relevance results
- Requested tool category not indexed returns empty match set
- Endpoint URL verification fails if target server is offline
- Token compression may strip edge-case metadata for niche tools
- Rate limiting or payment failure (x402) if payment not attached correctly

## 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/v1/execute)

## Output

Returns a compressed (up to 85% token reduction) listing of matching MCP servers or A2A tools, their capabilities, and routing metadata. For URL verification queries, returns status and validity of the given endpoint. Results pass through a Prompt-Guard firewall to block injected malicious instructions.

## 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-2332ae5a/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)