# 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 github-audit.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://github-audit.agentdiet.dev/v1/broker/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: github-audit.agentdiet.dev
- Website: https://github-audit.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/github-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-baeb41ee
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GyjCj-3R54WoFp41tvHVm

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 github-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-baeb41ee
```

Example prompt: Search the MCP tool index for any servers that handle SEC filings or company enrichment — I want to find the right tool to route my agent to.

## When to prefer this

Choose this endpoint when you need to dynamically discover which MCP server or A2A tool handles a specific capability, rather than hardcoding an endpoint. Especially useful in agent swarms that need to route tasks to the right tool at runtime, or when verifying an unknown MCP endpoint's compliance before use.

## Known failure modes

- Empty query string returns a validation error
- Unknown or unsupported capability query returns empty results
- Endpoint URL verification fails if the target is offline or non-compliant
- Rate limiting or payment failure (HTTP 402) if x402 micropayment is not satisfied
- Firewall block if query is flagged by Prompt-Guard as potentially malicious

## 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://github-audit.agentdiet.dev/v1/broker/execute)

## Output

Returns a compressed (up to 85% token reduction) list of matching MCP servers and A2A tools relevant to the query, including endpoint details, capability descriptions, and firewall-clearance 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/github-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-baeb41ee/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from github-audit.agentdiet.dev](https://www.zero.xyz/host/github-audit.agentdiet.dev/llms.txt)