# 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 an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results via a single meta-router connection

## Facts

- Endpoint: GET https://alpha-stream.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: 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-a91a3189
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pLdru6DPg7RXfNzf5x4Vd

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-a91a3189
```

Example prompt: Search the MCP and A2A tool index for anything that handles SEC filings or company enrichment — I want to see what's available with token-compressed results.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools support a given capability without maintaining its own index. Ideal for swarm orchestration scenarios where agents need to self-assemble toolchains, or when token budget is constrained and compressed tool metadata is valuable. Prefer over manual MCP registries when breadth (500+ servers), safety filtering, and single-connection convenience matter.

## Known failure modes

- Empty results if query is too vague or no matching tools are indexed
- Rate limiting or payment failure (HTTP 402) if x402 payment not properly handled
- Firewall rejection if query triggers Prompt-Guard heuristics
- Malformed query (minLength:1 not met) returns validation error
- Upstream MCP server unavailability may reduce result completeness

## 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/execute)

## Output

A filtered, token-compressed list of matching MCP servers or A2A tools from an index of 500+, screened through a Prompt-Guard firewall. Results include tool metadata relevant to the query, suitable for direct agent consumption or further routing.

## 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-a91a3189/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)