# Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (B2B Lead Enrichment Workflow)

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (B2B Lead Enrichment Workflow) is a paid API for AI agents from workflows.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Searches 500+ indexed MCP servers and A2A tools by capability query, or verifies a specific endpoint URL, returning compressed, firewall-filtered results via a single meta-router connection

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/workflows/b2b-lead-enrichment?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-b0c03427
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UQSDHNuRv2RQqboPTxjzx

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 workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-b0c03427
```

Example prompt: Search the MCP and A2A tool index for any servers that support B2B lead enrichment or company data lookup — I want to find what's available across the 500+ indexed tools.

## When to prefer this

Choose this endpoint when you need to discover or route to MCP servers and A2A tools across a large federated index without maintaining individual connections to each. Ideal for agent orchestration layers that need to dynamically find capabilities at runtime, or for verifying whether a specific agent endpoint is live and schema-compliant. Best when token efficiency matters, as the 85% compression reduces downstream LLM costs significantly.

## Known failure modes

- No matching tools found for the given capability query — returns empty results or low-confidence matches
- Query too vague or ambiguous — broad queries like 'data' may return unranked noise
- Endpoint URL verification fails if the target is offline or non-compliant
- Payment (x402) not resolved — endpoint returns HTTP 402 if micropayment not handled
- Rate limiting or quota exhaustion on the meta-router side

## 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://workflows.agentdiet.dev/v1/workflows/b2b-lead-enrichment)

## Output

A compressed (up to 85% token reduction) structured response listing matching MCP servers or A2A tools relevant to the capability query, or verification status for a provided endpoint URL, filtered through a Prompt-Guard firewall for safety. The response includes tool metadata, endpoint details, and routing information.

## 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/workflows-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-b0c03427/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)