# 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 protection.

## Facts

- Endpoint: GET https://hn-pulse.agentdiet.dev/v1/swarm-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-b1867d50
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_95sdh39r3DLbAMnFoCgqM

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-b1867d50
```

Example prompt: Search the swarm router for MCP tools that can do SEC filings and company enrichment — I want to see what's indexed and available through a single connection.

## When to prefer this

Choose this endpoint when you need to discover and route to one of many MCP servers or A2A tools without maintaining individual connections to each, especially when token budget is a concern (85% compression) or when prompt injection safety is required via the built-in Prompt-Guard firewall. Prefer this over direct tool connections when building agent orchestration layers that need to dynamically find the right tool for a given capability at runtime.

## Known failure modes

- Empty query string returns a validation error
- No matching tools found for obscure capability queries returns empty result set
- Endpoint URL verification may return unverified or unlisted status if not indexed
- Token compression edge cases may truncate tool descriptions unexpectedly
- Rate limiting or payment failure (HTTP 402) if x402 micropayment is not satisfied

## 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/swarm-router)

## Output

Returns a list of matched MCP servers or A2A tools relevant to the query, with compressed tool descriptions (85% token reduction), safety-screened through the Prompt-Guard firewall, along with metadata about each matched endpoint such as capability tags and routing info.

## 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-b1867d50/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)