# 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 2026-10-21).

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

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/v1/a2a-mesh?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-c6c70d82
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Pe9aj17ZBTlKZrYzvjL84

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-c6c70d82
```

Example prompt: Search the A2A and MCP tool index for any servers that support SEC filings or company financial data enrichment — I need to find the best available endpoint for that capability.

## 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, rather than hardcoding specific tool URLs. It is especially useful when building swarms or orchestrators that need to route tasks to the best available tool, or when verifying whether a remote agent endpoint is compliant before connecting to it.

## Known failure modes

- Missing or empty 'query' parameter returns a 400 validation error
- No matching tools found for a niche or misspelled capability query returns empty results
- Payment required (HTTP 402) if x402 micropayment header is not included
- Upstream MCP server index temporarily unavailable causes degraded or partial results
- Queried endpoint URL fails compliance check and returns audit failure details

## 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/a2a-mesh)

## Output

Returns a JSON object containing matching MCP servers and A2A tool endpoints relevant to the capability query, with compressed metadata and Prompt-Guard firewall screening applied. May include endpoint URLs, capability descriptions, compliance status, and routing information.

## 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-c6c70d82/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)