# 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 token-compressed results through a Prompt-Guard firewall

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/security-audit-dag?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-14d670b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6vaikECW-rPjZ2kxHVsER

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-14d670b2
```

Example prompt: Search the agentdiet MCP index for tools that handle 'github security audits' and show me the top matches with compressed metadata.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover and route to MCP servers or A2A tools without maintaining its own index. It is especially valuable for swarm orchestration scenarios where token efficiency matters (85% compression) and when safety filtering via Prompt-Guard is required to prevent prompt injection from untrusted tool metadata.

## Known failure modes

- Missing or empty 'query' parameter returns a 400 validation error
- Query matches zero tools in the index, returning an empty result set
- Endpoint URL verification input returns invalid or unreachable status
- Rate limiting or payment failure (HTTP 402) if x402 micropayment is not completed
- Firewall rejects query as potentially adversarial prompt injection

## 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/security-audit-dag)

## Output

A compressed list of matching MCP servers or A2A tool endpoints ranked by relevance to the query, with metadata about each tool's capabilities, connection details, and token-efficient descriptions filtered through the Prompt-Guard firewall.

## 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-14d670b2/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)