# 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 x402broker.com, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches 500+ indexed MCP servers and A2A tools to discover capabilities matching a query, with token compression and prompt-injection firewall, specifically surfaced through the code-release-security-gate workflow.

## Facts

- Endpoint: GET https://x402broker.com/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: x402broker.com
- Website: https://x402broker.com
- Canonical page: https://www.zero.xyz/c/x402broker-com-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-3797a66a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s710AVN-Us3yZN-d7LML5

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 x402broker-com-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-3797a66a
```

Example prompt: Search for MCP tools or A2A agents that can handle code release security checks — I need to find what's available for GitHub security audits or vulnerability scanning before a deployment.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP servers or A2A tools are available for a given capability — especially for code security or release-gate workflows — rather than hardcoding tool connections. Ideal when token budget is limited (85% compression) and prompt-injection safety is required.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for highly specific queries returns empty result set
- Endpoint URL verification may time out for slow remote servers
- Prompt-Guard firewall may block queries containing injection-like patterns
- HTTP 402 payment required if USDC payment 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://x402broker.com/v1/workflows/code-release-security-gate)

## Output

Returns a list of matching MCP server tools and A2A agent endpoints relevant to the query, with compressed metadata (up to 85% token reduction) and prompt-injection-filtered results, helping the agent identify and route to the most appropriate 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/x402broker-com-universal-a2a-mcp-tool-discovery-safe-proxy-swarm-3797a66a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)