# 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 2026-10-28).

Searches and routes queries across 500+ indexed MCP servers and A2A tools via a single meta-router connection with token compression and prompt firewall protection

## Facts

- Endpoint: POST https://github-audit.agentdiet.dev/v1/mcp-router?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- 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-aa9d52ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4kC7fUKy1wENtmBMTKaGy

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-aa9d52ad -d '<json body>'
```

Example prompt: Search the MCP router for tools that can handle SEC filings and company enrichment — I want to find what's available across all 500+ indexed servers without having to connect to each one separately.

## When to prefer this

Choose this endpoint when an agent needs to discover or route to any of 500+ MCP servers or A2A tools through a single connection, especially when token efficiency matters (85% compression) or when safety filtering of tool responses is required. Prefer over direct MCP connections when building multi-tool swarm pipelines or when the specific target tool is unknown and needs to be discovered by capability query.

## Known failure modes

- Empty query returns validation error
- No matching tools found for obscure capability queries
- Prompt-Guard firewall blocks queries flagged as prompt injection
- Payment required (HTTP 402) if x402 credits are not supplied
- Timeout if downstream MCP server is unresponsive

## 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/mcp-router)

## Output

Returns a list of matching MCP servers or A2A tools from the 500+ indexed catalog, with routing information, capability descriptions, and compressed responses 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-aa9d52ad/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)