# 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 metadata and prompt-guard filtering.

## Facts

- Endpoint: GET https://whale-momentum.agentdiet.dev/v1/b2b-osint-dag?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-19cd8c26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l9CtVOv4gC3OlT1yQC35n

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-19cd8c26
```

Example prompt: Search the MCP and A2A tool index for any available endpoints that handle SEC filings or company enrichment, and give me a compressed list of the best matches.

## When to prefer this

Choose this endpoint when an AI agent or swarm needs to dynamically discover which MCP servers or A2A tools support a given capability at runtime, especially when the agent does not have a hardcoded tool registry and needs to search across 500+ indexed providers. Prefer this over direct MCP connections when token budget is constrained (85% compression) or when prompt injection safety is required.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for obscure or misspelled capability queries
- Prompt-guard firewall may block queries flagged as potentially harmful
- Rate-limiting or payment failure (HTTP 402) if x402 credentials are missing or insufficient
- Upstream MCP server index may be stale or temporarily unavailable

## 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/b2b-osint-dag)

## Output

A compressed list of matching MCP server or A2A tool descriptors relevant to the capability query, including endpoint metadata, with 85% token compression applied and prompt-guard firewall filtering applied to remove unsafe or malicious entries.

## 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-19cd8c26/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)