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

## Facts

- Endpoint: GET https://workflows.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: 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-3d7032c0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_O1-splhpJ11KEs4ZWLCjH

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-3d7032c0
```

Example prompt: Search the MCP and A2A tool index for anything that can do 'SEC filings' or 'company enrichment' — I want to find the best available tool across all indexed servers without connecting to each one separately.

## When to prefer this

Choose this endpoint when an AI agent needs to discover the right MCP server or A2A tool from a large ecosystem without maintaining individual connections to hundreds of servers. Ideal for swarm orchestration scenarios, agent bootstrapping, or when you want a single safe-proxy layer with prompt-injection protection over untrusted tool responses. Prefer this over manual MCP server enumeration or raw tool registries when token efficiency and firewall filtering matter.

## Known failure modes

- Missing or empty query string returns validation error
- Query matches no indexed tools — returns empty result set
- Queried URL not found in index — returns unverified status
- Downstream MCP server index temporarily unavailable — returns partial or cached results
- Malformed endpoint URL in query causes parsing 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://workflows.agentdiet.dev/v1/crypto-alpha-dag)

## Output

Returns a compressed, firewall-screened list of matching MCP servers and A2A tools from a 500+ server index, including routing metadata, tool capability summaries, and verification status for queried endpoint URLs. Results are token-compressed (up to 85%) for efficient downstream agent consumption.

## 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-3d7032c0/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)