# 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 2026-10-23).

Searches and routes across 500+ MCP servers and A2A tools via a single meta-router endpoint with token compression and prompt firewall protection

## Facts

- Endpoint: POST https://alpha-stream.agentdiet.dev/v1/a2a-mesh?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-18b205cf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6P2dfxcjP5m8UqHqFUGCN

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-18b205cf -d '<json body>'
```

Example prompt: Search the A2A and MCP tool mesh for any available tools that handle 'GitHub security auditing' so I can route my next request to the right one.

## When to prefer this

Choose this endpoint when your agent needs to dynamically discover which MCP server or A2A tool handles a given capability without hard-coding tool lists. It is especially useful in swarm or multi-agent architectures where tool availability changes, or when you want safe-proxied access to hundreds of tools through a single connection with token-efficient responses.

## Known failure modes

- No matching tools found for query — empty result set returned
- Query too vague to narrow down to specific tools — broad results
- Prompt-Guard firewall blocks query if it resembles adversarial prompt injection
- Payment required (HTTP 402) if x402 credit is not provided
- Idempotency-Key collision causing unexpected cached result reuse

## 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/a2a-mesh)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, with capability descriptions and routing metadata, filtered through a Prompt-Guard firewall and delivered with 85% token compression to minimize agent context usage.

## 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-18b205cf/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)