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

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

## Facts

- Endpoint: GET https://llms-generator.agentdiet.dev/v1/mcp-router?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: llms-generator.agentdiet.dev
- Website: https://llms-generator.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/llms-generator-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-106f5746
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QLY6_1s3xBXgttMc_7-R_

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 llms-generator-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-106f5746
```

Example prompt: Search the MCP tool index for any servers that handle SEC filings or company enrichment, and return the best matches with compressed descriptions.

## When to prefer this

Choose this endpoint when your AI agent needs to discover, compare, or route to one of hundreds of MCP servers or A2A tools without maintaining separate connections to each. It is especially useful when you want a single federated search across the agent tool ecosystem with built-in prompt-injection protection and token-compressed responses, rather than querying individual tool registries or maintaining your own index.

## Known failure modes

- Empty or too-vague query returns low-relevance or no results
- Queried endpoint URL is unreachable or non-compliant, returning a validation error
- Index may be stale if newly registered MCP servers haven't been crawled yet
- Payment not processed (HTTP 402) if x402 credentials are missing or invalid
- Rate limiting if query volume exceeds per-account thresholds

## 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://llms-generator.agentdiet.dev/v1/mcp-router)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the query, including endpoint metadata and token-compressed tool descriptions, optionally filtered through a Prompt-Guard firewall to block injection attacks.

## 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/llms-generator-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-106f5746/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from llms-generator.agentdiet.dev](https://www.zero.xyz/host/llms-generator.agentdiet.dev/llms.txt)