# 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 an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results for agent routing and discovery

## Facts

- Endpoint: GET https://github-audit.agentdiet.dev/v1/workflows/code-release-security-gate?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-42edfd0a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cYW7Er8swHtI67JB0QVri

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-42edfd0a
```

Example prompt: Search the MCP and A2A tool index for servers that can handle GitHub security auditing — I want to see what's available with token-compressed results and prompt firewall protection.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP server or A2A tool provides a specific capability, rather than hardcoding a single tool. Especially useful for swarm architectures that need to route tasks to the best available tool at runtime, or when you want to verify an unknown endpoint for compliance and safety before use.

## Known failure modes

- Empty or too-broad query returns too many low-relevance results
- Query for a niche capability returns no matches if not yet indexed
- Endpoint URL verification may return inconclusive results for non-standard implementations
- Payment failure (HTTP 402) if x402 USDC micropayment is not correctly handled
- Prompt injection attempts blocked by Prompt-Guard firewall, returning a rejection response
- Timeout if the index is temporarily unavailable or under load

## 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/workflows/code-release-security-gate)

## Output

Returns a compressed, firewall-filtered list of matching MCP servers or A2A tools from the 500+ indexed entries, including routing metadata, capability descriptions, and token-compressed summaries relevant to the search query or verified endpoint URL.

## 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-42edfd0a/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)