# B2B Lead Enrichment via Universal A2A & MCP Tool Discovery Router

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

Searches a meta-index of 500+ MCP servers and A2A tools to discover and proxy relevant AI agent capabilities, with token compression and prompt safety filtering, specifically surfaced through a B2B lead enrichment workflow endpoint.

## Facts

- Endpoint: GET https://onchain-risk.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: onchain-risk.agentdiet.dev
- Website: https://onchain-risk.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/onchain-risk-agentdiet-dev-b2b-lead-enrichment-via-universal-a2a-mcp-92701cce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t4IbsJwBLwbarf0C_4A-U

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 onchain-risk-agentdiet-dev-b2b-lead-enrichment-via-universal-a2a-mcp-92701cce
```

Example prompt: Search the MCP and A2A tool index for capabilities related to 'B2B lead enrichment' — I need to find which agents or servers can enrich company data like firmographics, email verification, or domain OSINT.

## When to prefer this

Choose this endpoint when you need to discover which MCP servers or A2A tools can handle a specific capability without connecting to hundreds of individual servers — especially useful for B2B lead enrichment, company intelligence, or data enrichment workflows where the right downstream tool is unknown. Prefer this over direct MCP connections when token budget is constrained (85% compression) or when prompt safety is a concern.

## Known failure modes

- Empty query string returns validation error (minLength:1 not met)
- No matching tools found for obscure or misspelled capability query
- Upstream MCP server unavailability may result in partial or stale index results
- HTTP 402 payment required if x402 payment header is missing or insufficient
- Prompt injection attempts blocked by Prompt-Guard firewall, returning filtered or rejected response

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

## Output

Returns a JSON object containing matching MCP servers or A2A tools relevant to the capability query, with compressed tool descriptions (up to 85% token reduction) and safety-filtered metadata to help agents select and route to appropriate downstream capabilities.

## 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/onchain-risk-agentdiet-dev-b2b-lead-enrichment-via-universal-a2a-mcp-92701cce/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from onchain-risk.agentdiet.dev](https://www.zero.xyz/host/onchain-risk.agentdiet.dev/llms.txt)