# 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 2026-10-28).

Searches and routes queries across 500+ indexed MCP servers and A2A tools via a single connection, with token compression and prompt firewall protection.

## Facts

- Endpoint: POST https://alpha-stream.agentdiet.dev/v1/mesh/dispatch?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- 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-326638f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9xEFQCDXfV_60IJr9BOeT

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-326638f4 -d '<json body>'
```

Example prompt: Search the MCP tool mesh for anything that can do company enrichment or B2B lead data — I need to find the best available tool for that capability.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool can fulfill a capability, rather than hardcoding a direct API call. Ideal when orchestrating multi-agent swarms, when the right downstream tool is unknown at design time, or when token budget is constrained and compression is needed. Prefer this over direct tool calls when safety screening (Prompt-Guard) is required for untrusted inputs.

## Known failure modes

- Empty or vague query returns no useful matches
- Query string too short (minLength:1 enforced but semantic quality matters)
- No matching MCP server found for niche capability — returns empty result set
- Prompt-Guard firewall blocks injected or adversarial query content
- Payment required (HTTP 402) if x402 credits are exhausted
- Timeout if upstream MCP servers are slow to respond

## 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/mesh/dispatch)

## Output

Returns a matched list of MCP servers or A2A tools relevant to the query, along with routing metadata, compressed tool responses (up to 85% token reduction), and firewall-screened output indicating which tools are safe to invoke.

## 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-326638f4/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)