# 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 and returns compressed, firewall-screened tool matches via a single connection

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/tool-broker?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-ed26ceb0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9wuHK_2OOuOIRR0yOpWEO

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-ed26ceb0
```

Example prompt: Search the MCP and A2A tool index for anything that handles 'SEC filings' or 'company enrichment' — I want to find available tools I can plug into my agent workflow.

## When to prefer this

Use this endpoint when an agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability at runtime, especially when you want a single connection point that normalizes and compresses tool metadata across 500+ sources. Prefer this over manually curating tool lists or querying individual MCP directories when you need breadth of coverage, built-in prompt injection protection, or when token efficiency across tool descriptions matters.

## Known failure modes

- Empty results if query terms don't match any indexed tool
- Query too vague returns noisy or irrelevant tool matches
- Endpoint URL verification fails if the remote URL is unreachable
- Rate limiting or 402 payment required if quota exceeded
- Generic object response schema makes parsing results unpredictable

## 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/tool-broker)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the capability query, with tool metadata that has been compressed (up to 85% token reduction) and screened through a Prompt-Guard firewall for safety. May also return compliance or verification data if an endpoint URL is submitted.

## 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-ed26ceb0/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)