# 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 cve-intel.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 tool manifests filtered through a Prompt-Guard firewall

## Facts

- Endpoint: GET https://cve-intel.agentdiet.dev/v1/x402-gateway?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: cve-intel.agentdiet.dev
- Website: https://cve-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/cve-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-687d196f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oewXIw-QfEExlUmFklMEQ

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 cve-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-687d196f
```

Example prompt: Search the MCP and A2A tool index for servers that can handle GitHub security audits — I want to find what's available and route to the best match.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover and route to one of many MCP or A2A tools without hardcoding individual server connections; especially useful when token budget is a concern (85% compression) or when prompt injection from upstream tools is a risk (Prompt-Guard firewall). Prefer over direct MCP server connections when the target tool is unknown and needs to be searched at runtime.

## Known failure modes

- Empty query string returns a validation error (query is required, minLength 1)
- No matching tools found for an obscure or overly narrow capability query
- Prompt-Guard firewall blocks queries detected as adversarial or injection attempts
- x402 payment failure if USDC payment for the $0.01 per-call fee is not completed
- Upstream MCP server availability issues may result in stale or incomplete index entries
- Generic object response schema means callers must handle variable result shapes

## 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://cve-intel.agentdiet.dev/v1/x402-gateway)

## Output

A compressed, firewall-filtered list of matching MCP servers or A2A tools from a 500+ item index, including tool descriptors and routing metadata, with up to 85% token reduction applied to the manifest payload.

## 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/cve-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-687d196f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cve-intel.agentdiet.dev](https://www.zero.xyz/host/cve-intel.agentdiet.dev/llms.txt)