# 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 across 500+ indexed MCP servers and A2A tools by capability query, returning compressed, firewall-filtered tool metadata for agent routing.

## Facts

- Endpoint: POST https://whale-momentum.agentdiet.dev/v1/crypto-alpha-dag?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-b4459509
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kvAqBoUkFcxn9wq9xgasr

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-b4459509 -d '<json body>'
```

Example prompt: Search the MCP and A2A tool index for anything that handles 'context compression' and tell me what servers are available with their capabilities.

## 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 at runtime, rather than hardcoding tool lists. Especially useful for swarm orchestrators, meta-agents, or systems that need to route sub-tasks to specialized tools without prior knowledge of what's available. Prefer this over direct tool calls when the right downstream tool is unknown.

## Known failure modes

- Empty or too-short query returns no meaningful results
- Endpoint URL validation fails if the URL is unreachable or non-compliant
- Firewall may block or sanitize queries flagged as prompt-injection attempts
- Generic queries may return too many results without useful ranking
- Payment or x402 auth failure results in 402 response blocking the call

## 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/crypto-alpha-dag)

## Output

Returns a compressed, Prompt-Guard-filtered list of matching MCP servers and A2A tools with capability metadata, endpoint URLs, and routing information, using up to 85% token compression to minimize agent context overhead.

## 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-b4459509/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)