# 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 and routes across 500+ indexed MCP servers and A2A tools using a single connection with token compression and prompt injection firewall.

## Facts

- Endpoint: GET https://github-audit.agentdiet.dev/v1/crypto-alpha-dag?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-b6aa2674
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P3_Z73st0iCN-A0pJHqPt

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-b6aa2674
```

Example prompt: Search the AgentDiet meta-router for any indexed MCP servers or A2A tools that handle SEC filings or financial data retrieval — I need to find what's available with a single query.

## When to prefer this

Choose this endpoint when you need to discover or route to the right MCP server or A2A tool across a large federated index without maintaining separate connections to each provider. Especially useful when you don't know which specific tool to call and want a single search to surface relevant options with token-efficient metadata and built-in prompt injection protection.

## Known failure modes

- Query string too vague returns low-relevance or empty results
- Endpoint URL verification returns not-found if URL is not indexed
- Service may return partial results if upstream MCP servers are unavailable
- Overly broad queries may return a large unfiltered list requiring further refinement
- Payment failure (HTTP 402) if x402 micropayment is not correctly configured

## 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/crypto-alpha-dag)

## Output

A structured object listing matching MCP servers and A2A tools that satisfy the capability query, including endpoint metadata, token-compressed tool descriptions, and routing information filtered through the Prompt-Guard firewall.

## 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-b6aa2674/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)