# 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+ indexed MCP servers and A2A tools via a single connection, with token compression and prompt firewall protection.

## Facts

- Endpoint: GET https://llms-generator.agentdiet.dev/v1/agent-tool-marketplace?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-90860257
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L6jTSud-EP4T1ZWpYVvpf

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-90860257
```

Example prompt: Search the agent tool marketplace for MCP servers that support SEC filings data retrieval — I need to find the best available tool I can connect to.

## When to prefer this

Choose this endpoint when you need to discover or route to MCP servers or A2A tools at scale from a single connection, especially when token efficiency matters or you want firewall protection against prompt injection in tool responses. Prefer over manual tool registries when you need live indexing of 500+ servers with a unified interface.

## Known failure modes

- No matching tools found for the given query — returns empty result set
- Query string too vague — may return low-relevance results
- Endpoint URL verification fails if the provided URL is unreachable or non-compliant
- Rate limiting or payment failure via x402 may block access
- Prompt-Guard firewall may block queries containing injection patterns

## 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/agent-tool-marketplace)

## Output

Returns a list of matching MCP servers or A2A tools relevant to the capability query, including compressed metadata about each tool, their endpoints, and safety-filtered descriptions. Results are compressed to reduce token overhead.

## 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-90860257/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)