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

Searches a meta-index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-screened tool matches via a single connection.

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/workflows?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: alpha-stream.agentdiet.dev
- Website: https://alpha-stream.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/alpha-stream-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-4c5998e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BrdRAr4IT7EUMu2HsYSDC

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 alpha-stream-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-4c5998e1
```

Example prompt: Search the MCP tool index for any servers or A2A agents that support SEC filings or financial document retrieval — I need the top matches with compressed metadata so I can pick the best one for my workflow.

## When to prefer this

Choose this endpoint when you need to discover or route to one of many MCP servers or A2A tools without maintaining direct connections to each, especially when token budget is constrained (85% compression), security screening of tool responses is required, or you need a single-connection entry point to a large swarm of heterogeneous agent tools.

## Known failure modes

- Empty or too-short query string returns validation error
- Query matches no indexed tools, returning empty results
- Upstream MCP server index temporarily unavailable, causing timeout
- Prompt-Guard firewall blocks query flagged as adversarial input
- x402 payment failure prevents request from being processed

## 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://alpha-stream.agentdiet.dev/v1/workflows)

## Output

Returns a structured list of matching MCP servers and A2A tools relevant to the capability query, with 85% token-compressed metadata and Prompt-Guard firewall screening applied. Includes tool names, capability descriptions, endpoint URLs, and compliance indicators.

## 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/alpha-stream-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-4c5998e1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from alpha-stream.agentdiet.dev](https://www.zero.xyz/host/alpha-stream.agentdiet.dev/llms.txt)