# 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 domain-osint.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Searches a meta-index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-screened results via a single connection

## Facts

- Endpoint: POST https://domain-osint.agentdiet.dev/v1/mesh?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-dce9c816
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0iiTfgtPwfdLqgDKxFKkX

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 domain-osint-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-dce9c816 -d '<json body>'
```

Example prompt: Search the MCP tool index for any servers that can handle context compression or GitHub security auditing — I want to see what's available with token-efficient results.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools support a given capability at runtime, rather than hard-coding tool endpoints. It is especially valuable in multi-agent swarm architectures where routing decisions must be made on the fly, and when security (prompt-injection firewall) and token efficiency (85% compression) are priorities over raw query flexibility.

## Known failure modes

- Query too vague returns zero or irrelevant tool matches
- Firewall blocks a legitimate tool result flagged as a false positive
- Token compression may truncate tool descriptions for very large result sets
- Payment failure (HTTP 402) if x402 USDC micropayment is not processed
- Rate limiting or timeout if the upstream meta-index is unavailable

## 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://domain-osint.agentdiet.dev/v1/mesh)

## Output

A compressed, firewall-screened list of matching MCP servers and A2A tools relevant to the capability query, with 85% token reduction applied and prompt-injection threats filtered out before delivery.

## 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/domain-osint-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-dce9c816/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)