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

Searches and discovers MCP servers and A2A agent tools from a 500+ endpoint index using a natural language capability query, with built-in prompt firewall protection.

## Facts

- Endpoint: GET https://agentdiet.dev/v1/workflows/defi-token-due-diligence?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-f8ba0f8a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tcRqWvCoxo8A5HIWyyga2

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 agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-f8ba0f8a
```

Example prompt: Search the agentdiet tool index for MCP servers that can handle SEC filings and company enrichment — I want to find available endpoints I can plug into my agent workflow.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover and route to specialized MCP servers or A2A tools without pre-hardcoding integrations. Ideal for swarm orchestration, tool-of-tools patterns, or when building meta-agents that need to find the right capability at runtime. Prefer this over maintaining a static tool registry when the tool landscape changes frequently or when you need 500+ tools accessible through a single connection with built-in prompt safety.

## Known failure modes

- Empty or too-broad query returns low-relevance or no results
- Query string too short (minLength:1 not meaningful enough) returns generic matches
- Endpoint URL verification query returns no match if URL is not indexed
- Response schema is generic object — structure of results may vary
- Payment not completed (HTTP 402) blocks access to results
- Rate limiting or quota exhaustion for repeated identical queries

## 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://agentdiet.dev/v1/workflows/defi-token-due-diligence)

## Output

A structured response listing matching MCP servers and A2A tool endpoints from the 500+ tool index, including their capabilities, metadata, and routing information, filtered through a Prompt-Guard firewall for safety.

## 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/agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-router-f8ba0f8a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdiet.dev](https://www.zero.xyz/host/agentdiet.dev/llms.txt)