# 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).

Searches and routes across 500+ indexed 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/agent-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-f5fb4834
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Jr6ayiYvLn9dPuNmg8Vg8

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-f5fb4834
```

Example prompt: Search the A2A and MCP tool index for anything that can do 'github security audits' — I want to see which tools are available and how to reach them.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover and connect to MCP servers or A2A tools without maintaining its own registry, especially when token budget is constrained (85% compression claimed) or when prompt injection safety is required at the routing layer. Best when building multi-tool orchestration pipelines that need to search across a large catalog of agent capabilities from a single connection point.

## Known failure modes

- Query returns no matching tools if the capability is too niche or misspelled
- Response may be incomplete if the indexed registry has not recently updated for a new MCP server
- HTTP 402 payment required if x402 USDC micropayment is not sent with the request
- Overly broad queries may return too many results with insufficient differentiation
- Firewall may block queries containing patterns that resemble prompt injection attempts

## 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/agent-router)

## Output

A JSON object listing matched MCP servers and A2A tools relevant to the query, with routing metadata, token-compressed manifests, and connection details, filtered through a Prompt-Guard firewall to block injection payloads.

## 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-f5fb4834/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)