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

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (B2B Lead Enrichment) 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 an index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-filtered results for agent tool discovery and routing.

## 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-fe71da5c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TK19ZV7AHEmy7bONH8S0U

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-fe71da5c
```

Example prompt: Search the MCP and A2A tool index for capabilities related to 'company enrichment' — I need to find the best agent tools for B2B lead data.

## When to prefer this

Use this endpoint when an agent needs to dynamically discover which MCP servers or A2A tools support a given capability, especially when building multi-agent pipelines that require routing to the right specialized tool. Prefer this over manually curated tool lists when you need access to a broad index (500+) of live agent capabilities with built-in safety filtering.

## Known failure modes

- Empty query string returns validation error
- No matching tools found for niche capability query returns empty results
- Endpoint URL verification may fail if target is offline or non-compliant
- Rate limiting or payment failure (HTTP 402) if x402 payment not satisfied
- Overly broad queries may return low-relevance results

## 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

Returns a compressed, Prompt-Guard-filtered list of matching MCP servers or A2A tools relevant to the search query, including metadata about each tool's capabilities, or verification status if an endpoint URL is provided. Results include up to 85% token compression for efficiency.

## 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-fe71da5c/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)