# 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 catalog of 500+ MCP servers and A2A tools using a natural language query, returning compressed, firewall-screened capability matches

## Facts

- Endpoint: GET https://github-audit.agentdiet.dev/v1/broker/catalog?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-0d170b6c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4oAfLsPlYnQzelml0L7CS

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-0d170b6c
```

Example prompt: Search the MCP and A2A tool catalog for anything that handles SEC filings or company financial data — I want to find the right tool to plug into my agent.

## When to prefer this

Choose this endpoint when you need to discover which MCP servers or A2A tools exist for a given capability without querying each tool individually — especially when building or expanding an agent swarm and needing a single connection point with built-in token compression and prompt injection protection. Prefer over manual catalog browsing or individual server probing when breadth of discovery (500+ indexed tools) and safety filtering matter.

## Known failure modes

- Empty query string returns a validation error (minLength:1 required)
- Query matches no tools in the catalog, returning an empty result set
- Upstream catalog index is stale or temporarily unavailable, causing incomplete results
- Malformed or unrecognized endpoint URL provided for verification returns no match
- Rate limiting or payment failure (x402) blocks the request

## 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/catalog)

## Output

A catalog response listing matched MCP servers and A2A tools relevant to the query, with metadata such as capability descriptions and endpoint details, compressed by approximately 85% for token efficiency and screened 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/github-audit-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-0d170b6c/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)