# 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 queries across 500+ MCP servers and A2A agent tools via a single connection, with token compression and prompt injection protection.

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/workflows/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-67d6bf49
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vIu1VyH-NVzYND2kfwS35

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-67d6bf49
```

Example prompt: Search the agentdiet meta-router for tools that handle 'context compression' — I want to find an MCP server or A2A endpoint I can plug into my workflow for squeezing down token usage.

## When to prefer this

Choose this endpoint when you need to dynamically discover and route to the right MCP server or A2A tool from a large index rather than hardcoding a specific tool, or when you want prompt-injection-safe proxying and token-compressed responses across multiple agent frameworks in a single call.

## Known failure modes

- Empty query string returns a 400 validation error
- No matching tools found for obscure or misspelled capability queries
- Endpoint URL verification may return inconclusive results for non-standard servers
- Rate limiting or x402 payment failure if USDC balance is insufficient
- Generic 500 error if the upstream index is temporarily unavailable

## 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/workflows/execute)

## Output

Returns a list of matching MCP servers or A2A tool metadata entries relevant to the query, including endpoint details and compressed capability descriptions, or a verification result if an endpoint URL was provided.

## 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-67d6bf49/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)