# 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 tool metadata for agent routing and discovery.

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/api/mcp/audit?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-7e35c3db
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l3--6_o-4iDYph_mDUkCZ

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-7e35c3db
```

Example prompt: Search the MCP tool index for servers that handle 'github security' — I want to find available agent tools I can route to for code auditing.

## When to prefer this

Use this endpoint when an AI agent needs to dynamically discover which MCP servers or A2A tools support a given capability, rather than hardcoding tool URLs. Ideal for multi-agent swarms, meta-orchestrators, or agents that need to self-configure their tool belt at runtime. Prefer this over a static tool registry when you need real-time index freshness, token-compressed manifests, or built-in prompt-injection firewall filtering on returned tool descriptions.

## Known failure modes

- Missing or empty 'query' parameter returns a validation error
- Query matches no indexed tools — returns empty results set
- Endpoint URL verification fails if the target is unreachable or unregistered
- Rate limiting or payment failure (HTTP 402) if x402 credits are exhausted

## 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/api/mcp/audit)

## Output

Returns a structured object listing matched MCP servers or A2A tools relevant to the query, including compressed capability descriptors, safety/firewall status, and routing metadata — with up to 85% token reduction compared to raw tool manifests.

## 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-7e35c3db/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)