# 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 routes across 500+ MCP servers and A2A tools via a single compressed meta-router endpoint with prompt-injection firewall protection.

## Facts

- Endpoint: GET https://agentdiet.dev/v1/bundle-execute?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-399b2c09
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6gj5k1WaUxI8tY1VSrwS_

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-399b2c09
```

Example prompt: Search the MCP tool index for anything that handles SEC filings or company enrichment — I need to know which servers support those capabilities so my agent can route to them.

## When to prefer this

Choose this endpoint when you need to discover which MCP servers or A2A tools support a given capability without manually querying each one — especially useful for agent orchestration layers that need to route tasks dynamically, compress tool manifests to save tokens, or verify an endpoint's legitimacy before proxying through it. Prefer this over manual MCP server catalogs when building multi-agent swarms that need real-time tool routing.

## Known failure modes

- Empty or vague query returns low-relevance results
- Queried endpoint URL not found in the 500+ server index
- Prompt-Guard firewall may block or sanitize queries containing injection patterns
- Payment required error (HTTP 402) if x402 micropayment not provided
- Timeout if upstream MCP server index is unavailable
- Overly broad queries may return too many results to be useful

## 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/bundle-execute)

## Output

Returns a compressed index of matching MCP servers and A2A tool endpoints relevant to the query, including capability metadata, with up to 85% token reduction compared to raw tool manifests. May include safety flags from the Prompt-Guard firewall if a queried endpoint is flagged.

## 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-399b2c09/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)