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

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

## Facts

- Endpoint: GET https://workflows.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: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-6cf62832
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Kul_5dviRxmZWuu4rIrRL

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 workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-6cf62832
```

Example prompt: Search the MCP tool index for agents that handle 'SEC filings' or 'company enrichment' and tell me which endpoints are available with their capabilities.

## When to prefer this

Choose this endpoint when an AI agent needs to discover which MCP servers or A2A tools support a given capability without maintaining its own registry, or when safe proxying and token compression across a large tool ecosystem is required. Prefer over direct MCP registries when prompt-injection protection and unified single-connection routing across 500+ servers matters.

## Known failure modes

- Empty query string returns validation error
- Unknown or unindexed endpoint URL returns no match
- Prompt injection attempts blocked by Prompt-Guard firewall with rejection notice
- Service unavailable if 500+ server index is unreachable
- Payment not completed (x402) results in 402 response before results are returned

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

## Output

Returns a list of matching MCP servers and A2A tool endpoints relevant to the capability query, with 85% token-compressed metadata and firewall screening applied. May include endpoint URLs, capability descriptions, latency indicators, and safety flags.

## 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/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-6cf62832/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)