# 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 results via a single connection

## Facts

- Endpoint: GET https://llms-generator.agentdiet.dev/v1/crypto-alpha-dag?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-a2a6bdeb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pkIuFJnt9tmwrQs0KK70B

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-a2a6bdeb
```

Example prompt: Search the MCP tool index for agents that can do SEC filings discovery — I want to find which servers support that capability and get back compressed, firewall-safe results.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools support a given capability without hardcoding tool lists — especially useful in swarm or meta-agent architectures where the set of available tools is large or changing, and when token budget is constrained (85% compression) or prompt injection risk is a concern.

## Known failure modes

- Empty query string returns validation error
- Query matches no indexed tools, returning empty result set
- Endpoint URL verification fails if the target is not indexed
- Service may return stale index data if MCP servers have gone offline
- Payment (x402) not fulfilled results in HTTP 402 response blocking access

## 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/crypto-alpha-dag)

## Output

Returns a compressed (up to 85% token reduction) list of matching MCP servers or A2A tools ranked by relevance to the query, including metadata such as endpoint URLs, capability descriptions, and firewall validation status from the Prompt-Guard layer.

## 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-a2a6bdeb/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)