# 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).

Discovers and routes to 500+ MCP servers and A2A tools via a single connection, with token compression and prompt-injection firewall

## Facts

- Endpoint: POST https://whale-momentum.agentdiet.dev/v1/a2a-router?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-111b7ebd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Lz6-huKFxbFNIWyHaP-CZ

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-111b7ebd -d '<json body>'
```

Example prompt: Search across all indexed MCP servers and A2A tools to find me something that handles SEC filings, and route my query through the safe proxy with token compression enabled.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool can handle a given task, especially when operating in a multi-tool swarm environment with token budget constraints. It is ideal when you want a single connection point to 500+ tools rather than maintaining individual integrations, and when prompt-injection safety on external tool responses is a priority.

## Known failure modes

- Query returns no matching tools if the capability is too niche or not indexed
- Token compression may lose nuance for highly detailed tool descriptions
- Prompt-Guard firewall may block legitimate but ambiguous payloads
- Endpoint unavailable if upstream MCP servers are offline
- Missing or malformed query field returns validation error

## 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/v1/a2a-router)

## Output

Returns a list of matched MCP servers or A2A tools relevant to the query, with compressed tool descriptions (up to 85% token reduction), safety-filtered responses via Prompt-Guard firewall, and routing metadata including endpoint URLs and capability summaries.

## 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-111b7ebd/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)