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

Searches and routes queries across 500+ indexed MCP servers and A2A tools via a single connection, with token compression and prompt-injection firewall.

## Facts

- Endpoint: GET https://mcp-security.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: mcp-security.agentdiet.dev
- Website: https://mcp-security.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-608d7b54
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j54CMkHmGWWYTKXU3mAsN

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 mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-608d7b54
```

Example prompt: Search the swarm router for available MCP tools that handle SEC filings or company enrichment — I want to find which ones are indexed and ready to use.

## When to prefer this

Choose this endpoint when your agent needs to discover the right tool for an unknown capability across a broad landscape of MCP servers and A2A APIs, especially when you want a single-connection entrypoint, 85% token compression on results, and built-in prompt-injection safety rather than manually curating tool lists or calling multiple registries.

## Known failure modes

- Missing or empty 'query' parameter returns 400 validation error
- Query returns no matching tools if capability is not indexed
- Payment required (HTTP 402) if x402 credit not provided
- Prompt-Guard may suppress results flagged as injection attempts, returning fewer results than expected
- Upstream MCP server may be offline despite being indexed

## 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://mcp-security.agentdiet.dev/v1/swarm-router)

## Output

Returns a list of matching MCP servers and A2A tools from the 500+ indexed registry, with tool metadata, endpoint details, and token-compressed summaries — all filtered through the Prompt-Guard firewall to strip hidden injection attempts before surfacing results to the agent.

## 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/mcp-security-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-608d7b54/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-security.agentdiet.dev](https://www.zero.xyz/host/mcp-security.agentdiet.dev/llms.txt)