# 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 a meta-index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered tool matches for agent routing

## Facts

- Endpoint: GET https://llms-generator.agentdiet.dev/api/mcp/audit?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-80b3174b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W972xcRCZUA13Dlp37Nmn

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-80b3174b
```

Example prompt: Search the MCP tool index for servers that can handle SEC filings or company enrichment — I need to find the best available tool with prompt-guard filtering enabled.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover and route to MCP servers or A2A tools at runtime rather than hardcoding tool connections. It is especially useful when building multi-agent swarms that need to find the right specialized tool on demand, when token budget is a concern (85% compression), or when safety filtering via Prompt-Guard is required before proxying to third-party agents.

## Known failure modes

- Empty query string returns validation error (query is required, minLength 1)
- No matching tools found for obscure or misspelled capability queries
- Payment required (HTTP 402) if x402 micropayment header not provided
- Upstream MCP server index may be stale or partially unavailable
- Overly broad queries may return too many results with insufficient routing signal

## 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/api/mcp/audit)

## Output

Returns a structured object listing matching MCP servers and A2A tools relevant to the query, with compressed tool descriptions (up to 85% token reduction) and Prompt-Guard firewall filtering applied. May include tool metadata, endpoint URLs, capability summaries, and routing recommendations.

## 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-80b3174b/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)