# 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 whale-momentum.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 matching endpoints with token-compressed results through a Prompt-Guard firewall

## Facts

- Endpoint: GET https://whale-momentum.agentdiet.dev/api/mcp/audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: whale-momentum.agentdiet.dev
- Website: https://whale-momentum.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/whale-momentum-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-80271a1a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kgAZETKm9WFGmwnUUPkHU

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 whale-momentum-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-80271a1a
```

Example prompt: Search the MCP tool index for anything related to 'company enrichment' and show me which servers or A2A tools are available to handle that capability.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool handles a given capability at runtime, rather than hardcoding tool URLs. Especially useful when building swarm architectures or meta-agents that need to route sub-tasks to specialized tools across a large, curated index.

## Known failure modes

- Missing or empty query parameter returns validation error
- No matching tools found for obscure capability queries
- Firewall may block or sanitize queries containing prompt injection patterns
- Endpoint may return generic object response with unclear structure
- Payment required (HTTP 402) if x402 balance is insufficient

## 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://whale-momentum.agentdiet.dev/api/mcp/audit)

## Output

Returns a list of matching MCP servers or A2A tools from a 500+ item index, including tool names, capabilities, endpoint URLs, and token-compressed descriptions, filtered through a Prompt-Guard firewall for safety

## 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/whale-momentum-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-80271a1a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whale-momentum.agentdiet.dev](https://www.zero.xyz/host/whale-momentum.agentdiet.dev/llms.txt)