# 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 and routes queries across 500+ indexed MCP servers and A2A tools through a single meta-router endpoint with token compression and prompt-injection firewall

## Facts

- Endpoint: GET https://whale-momentum.agentdiet.dev/v1/workflows/execute?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-897870a5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bA61KZFRMMbf09snrgiBZ

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-897870a5
```

Example prompt: Search the MCP tool index for any servers that handle SEC filings or company enrichment — I want to see what's available before I pick one to call.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool is best suited for a given capability without hardcoding individual tool URLs. Prefer this over direct MCP connections when you want a single normalized interface across 500+ tools, need token-compressed manifests to reduce context usage, or require a security firewall layer to protect against prompt-injection from untrusted tool descriptions.

## Known failure modes

- Empty query returns validation error
- No matching tools found for obscure capability queries
- Upstream MCP server unavailable causing partial results
- Token compression may truncate detailed schema information
- Payment required (HTTP 402) if USDC balance 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/v1/workflows/execute)

## Output

Returns a list of matching MCP servers or A2A tool endpoints relevant to the search query, with compressed capability descriptions, tool metadata, and routing information. Results are filtered through a Prompt-Guard firewall to prevent prompt-injection attacks from upstream tools.

## 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-897870a5/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)