# 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 json-repair.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-22).

Searches and routes across 500+ indexed MCP servers and A2A tools via a single connection, with token compression and prompt injection firewall.

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/v1/workflows/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Provider: json-repair.agentdiet.dev
- Website: https://json-repair.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/json-repair-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-f5cdb131
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NZjLcSW0Hjp9ocVC6ZOEh

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 json-repair-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-f5cdb131
```

Example prompt: Search the MCP and A2A tool index for servers that handle 'SEC filings' so I can find the right endpoint to pull company financial data.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover which MCP server or A2A tool to use for a given capability, rather than hardcoding a specific endpoint. Especially useful for multi-agent swarms or orchestrators that need to find and proxy to specialized tools without managing many separate connections.

## Known failure modes

- Empty results if query is too vague or no indexed tool matches
- Timeout if the upstream MCP index is unavailable
- 402 Payment Required if the $0.01 per-call fee has not been settled
- Invalid query format if the query string is empty or malformed

## 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://json-repair.agentdiet.dev/v1/workflows/execute)

## Output

Returns a list of matching MCP servers or A2A tool endpoints relevant to the query, including metadata about each tool's capability, along with routing information to invoke them safely through the proxy layer.

## 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/json-repair-agentdiet-dev-universal-a2a-mcp-tool-discovery-safe-proxy-f5cdb131/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from json-repair.agentdiet.dev](https://www.zero.xyz/host/json-repair.agentdiet.dev/llms.txt)