# 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 2026-10-23).

Discovers, proxies, and routes across 500+ MCP servers and A2A tools via a single connection, with token compression and prompt-injection firewall

## Facts

- Endpoint: POST https://github-audit.agentdiet.dev/v1/web-rag-shield-dag?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-239925d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_79P0o3CSmYM_FT2eNBHLC

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-239925d9 -d '<json body>'
```

Example prompt: Search across 500+ MCP servers and A2A tools for any capability that handles 'GitHub security audit' — route through the safe-proxy with prompt-guard enabled and give me the compressed results.

## When to prefer this

Choose this endpoint when an agent needs to discover and route across a large catalog of MCP or A2A tools from a single connection, especially when token budget is constrained (85% compression), when prompt-injection safety is required, or when the agent needs to orchestrate a swarm of sub-agents without managing individual server connections.

## Known failure modes

- Query too vague returns low-relevance tool matches
- Payment not processed (x402) results in 402 error blocking access
- Prompt-guard firewall flags query as injection attempt and blocks execution
- No matching tools found for highly niche capability queries
- Timeout if upstream MCP servers are 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/web-rag-shield-dag)

## Output

Returns a ranked list of matching MCP servers or A2A tools for the query, with token-compressed capability summaries, endpoint routing metadata, and prompt-guard firewall validation status for each result.

## 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-239925d9/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)