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

> Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (B2B OSINT DAG) is a paid API for AI agents from mcp-compiler.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, verify, or route to the right AI capability, with token compression and prompt-injection firewall built in.

## Facts

- Endpoint: GET https://mcp-compiler.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: mcp-compiler.agentdiet.dev
- Website: https://mcp-compiler.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-compiler-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-42fddf42
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_odOwPKf6xq_yATiWGMmhf

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 mcp-compiler-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-42fddf42
```

Example prompt: Search the MCP tool index for capabilities related to 'company enrichment' — I want to find which MCP servers or A2A tools can help me enrich B2B lead data.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool provides a specific capability at runtime, rather than hardcoding tool integrations. Especially useful in swarm or multi-agent architectures where the right tool is not known in advance, or when verifying whether a particular endpoint URL is legitimate and indexed.

## Known failure modes

- Empty result set if no tools match the query string
- Query too vague returns overly broad or irrelevant matches
- Endpoint URL verification may fail if the URL is not indexed
- Service may return generic error object if backend index is unavailable
- Rate limiting or payment failure via x402 if USDC balance is 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://mcp-compiler.agentdiet.dev/v1/b2b-osint-dag)

## Output

Returns a structured object listing matched MCP servers or A2A tools relevant to the query, including metadata about each tool's capabilities, endpoint URLs, and routing information — compressed to minimize token usage.

## 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/mcp-compiler-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-42fddf42/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-compiler.agentdiet.dev](https://www.zero.xyz/host/mcp-compiler.agentdiet.dev/llms.txt)