# Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (Code Release Security Gate)

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (Code Release Security Gate) is a paid API for AI agents from defi-yield.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches a meta-index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results via a single proxied connection

## Facts

- Endpoint: GET https://defi-yield.agentdiet.dev/v1/workflows/code-release-security-gate?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: defi-yield.agentdiet.dev
- Website: https://defi-yield.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/defi-yield-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-6dbde5db
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AtH06f9g7fi8Tkl11KI3c

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 defi-yield-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-6dbde5db
```

Example prompt: Search the MCP and A2A tool index for servers that handle GitHub security audits — I want to find the best proxied, firewall-safe option available.

## When to prefer this

Use this endpoint when an agent needs to dynamically discover and route to one of hundreds of MCP servers or A2A tools without maintaining individual connections, especially when token efficiency matters or when security filtering (prompt injection guard) is required before invoking external tools.

## Known failure modes

- No matching tools found for the given query — returns empty results
- Query string too vague — may return irrelevant tools across unrelated domains
- Firewall blocks a result if prompt injection is detected in tool metadata
- Upstream MCP server unavailable — proxied result may be stale or missing
- Payment not completed — HTTP 402 returned if x402 micropayment is not attached

## 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://defi-yield.agentdiet.dev/v1/workflows/code-release-security-gate)

## Output

Returns a compressed (up to 85% token reduction) list of matching MCP servers or A2A tools from a 500+ entry index, filtered through a Prompt-Guard firewall, with metadata about each matching capability.

## 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/defi-yield-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-6dbde5db/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defi-yield.agentdiet.dev](https://www.zero.xyz/host/defi-yield.agentdiet.dev/llms.txt)