# 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 2026-10-23).

Searches a meta-index of 500+ MCP servers and A2A tools by capability query, returning token-compressed results filtered through a Prompt-Guard firewall

## Facts

- Endpoint: POST https://whale-momentum.agentdiet.dev/api/mcp/audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-6358d89d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bXMZA1zHUlJu82gkNePOQ

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-6358d89d -d '<json body>'
```

Example prompt: Search across all indexed MCP servers and A2A tools to find ones that support context compression — I need the top matches with token-efficient results and prompt-firewall filtering enabled.

## When to prefer this

Choose this endpoint when an AI agent needs to discover which MCP servers or A2A tools are available for a given capability without maintaining its own registry, or when you need a single safe-proxy connection that compresses token usage and guards against prompt injection across a large tool ecosystem. Prefer it over manual tool catalogs or direct MCP server connections when operating an agent swarm that needs centralized, curated routing.

## Known failure modes

- Query too vague returns low-relevance or empty tool matches
- Prompt-Guard firewall blocks query if it resembles a prompt injection attempt
- Invalid or unrecognized endpoint URL returns no match on verification
- Service unavailable if 402 payment not completed before request
- Malformed query (empty string) rejected by minLength:1 schema validation

## 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 compressed list of matching MCP servers or A2A tools relevant to the capability query, with metadata about each tool, filtered through a Prompt-Guard firewall to block adversarial content, at up to 85% token compression versus raw responses.

## 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-6358d89d/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)