# 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 token-intel.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 keyword or URL, returning compressed, firewall-filtered results via a single meta-router connection

## Facts

- Endpoint: GET https://token-intel.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: token-intel.agentdiet.dev
- Website: https://token-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-063e06b6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XwiEaNdZzLFlx4VIR8_lB

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 token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-063e06b6
```

Example prompt: Search the MCP and A2A tool index for any servers that handle SEC filings or company enrichment — I want to see what's available so I can pick the right tool for my research agent.

## When to prefer this

Choose this endpoint when you need to discover or route to MCP servers or A2A tools from a large curated index without managing multiple separate connections. It is especially valuable when you need token-efficient tool manifests, want Prompt-Guard firewall protection before proxying to unknown agents, or need to verify whether a specific endpoint URL is indexed and compliant. Prefer it over manual tool registries when building multi-agent swarms that require dynamic capability discovery.

## Known failure modes

- Empty results if query terms don't match any indexed tool capabilities
- Firewall rejection if a submitted URL is flagged as unsafe by Prompt-Guard
- Payment required error (HTTP 402) if x402 payment is not included or fails
- Malformed query (missing or empty 'query' parameter) returns validation error
- Index may be stale if recently added MCP servers haven't been crawled yet

## 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://token-intel.agentdiet.dev/v1/b2b-osint-dag)

## Output

Returns a compressed (up to 85% token reduction) list of matching MCP servers or A2A tool entries from the 500+ item index, including metadata about each tool's capabilities, schema, and safety status after Prompt-Guard firewall filtering.

## 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/token-intel-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-063e06b6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from token-intel.agentdiet.dev](https://www.zero.xyz/host/token-intel.agentdiet.dev/llms.txt)