# 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 serp-extract.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches and verifies 500+ MCP servers and A2A agent tools via a single meta-router endpoint with token compression and prompt firewall protection.

## Facts

- Endpoint: GET https://serp-extract.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: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-ae676194
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dmu5k-VMu_QY3h8GGlbHM

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 serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-ae676194
```

Example prompt: Search the agentdiet meta-router for MCP tools that handle 'github security' audits — I want to find all indexed servers that offer that capability and see which ones pass the prompt firewall check.

## When to prefer this

Choose this endpoint when you need a single-connection way to discover, search, or verify MCP servers and A2A agent tools without managing connections to hundreds of individual registries. It is especially useful when token efficiency matters (85% compression), when you need prompt-firewall safety filtering, or when you want to verify an unknown third-party agent endpoint before connecting to it.

## Known failure modes

- Empty query string returns validation error (minLength:1 enforced)
- No matching tools found returns empty or minimal result object
- Unrecognized endpoint URL during verification returns inconclusive status
- Payment not provided or declined results in HTTP 402 response
- Upstream index unavailable causes delayed or error response

## How this service works

Evaluates any GitHub repository for license risk, maintenance velocity, stars/forks, and supply-chain security before code execution. (Live x402 v2, IETF MPP & MCP endpoint at https://serp-extract.agentdiet.dev/v1/workflows/code-release-security-gate)

## Output

Returns a structured object listing matching MCP servers and A2A tools relevant to the search query, or verification status for a provided endpoint URL. Results include compressed tool metadata with up to 85% token reduction and prompt-firewall safety signals.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "repo"
 ],
 "properties": {
  "repo": {
   "type": "string",
   "minLength": 1,
   "description": "GitHub repository in owner/name format (e.g. modelcontextprotocol/servers or langchain-ai/langgraph)"
  },
  "limit": {
   "type": "integer",
   "default": 20,
   "maximum": 100,
   "minimum": 1,
   "description": "Maximum number of items to return per page (1-100)"
  },
  "cursor": {
   "type": "string",
   "description": "Opaque pagination cursor for fetching the next page"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/serp-extract-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-ae676194/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)