# 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 hn-pulse.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Discovers and routes to 500+ MCP servers and A2A tools via a single connection, with token compression and prompt injection firewall

## Facts

- Endpoint: GET https://hn-pulse.agentdiet.dev/v1/a2a-router?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: hn-pulse.agentdiet.dev
- Website: https://hn-pulse.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/hn-pulse-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-73646c55
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6XQ55NCxwEi_6H6sW0n5u

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 hn-pulse-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-73646c55
```

Example prompt: Search the MCP and A2A tool registry for any available tools that handle SEC filings or company enrichment, and tell me which ones are available right now.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover or route to one of many MCP or A2A tools without maintaining separate integrations for each. It is especially useful for swarm architectures, agent orchestration pipelines, or when you need a safety-filtered (prompt injection protected) proxy layer over a large tool ecosystem.

## Known failure modes

- Empty result set if no tools match the query string
- Timeout or 402 payment required if micropayment not completed
- Prompt-Guard firewall blocks queries flagged as injection attempts
- Malformed query (empty string) rejected due to minLength:1 constraint
- Unavailable backend MCP servers may not appear in results

## 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://hn-pulse.agentdiet.dev/v1/a2a-router)

## Output

Returns a structured list of matching MCP servers or A2A tools relevant to the query, with metadata about each tool including capabilities, connection details, and safety-filtered (Prompt-Guard) results. Token-compressed to reduce overhead by up to 85%.

## 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/hn-pulse-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-73646c55/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hn-pulse.agentdiet.dev](https://www.zero.xyz/host/hn-pulse.agentdiet.dev/llms.txt)