# 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 2026-10-23).

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

## Facts

- Endpoint: POST https://json-repair.agentdiet.dev/v1/security-audit-dag?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-8550c96b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eNqmtDOWKKkbENQXtrRze

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-8550c96b -d '<json body>'
```

Example prompt: Search the MCP and A2A tool index for any servers that support context compression or token reduction — I want to see what's available across the 500+ indexed tools.

## When to prefer this

Choose this endpoint when an agent needs to dynamically discover which MCP server or A2A tool supports a given capability without knowing the target endpoint in advance. Ideal for swarm orchestration, meta-agent routing, or when building tool-use pipelines that need to self-configure. Prefer over hardcoded tool lists when the landscape of available agents may change or when you need a single connection point with built-in prompt safety filtering.

## Known failure modes

- Empty or vague query returns no matches or overly broad results
- Queried endpoint URL not found in the index returns an empty or not-found response
- Prompt-Guard firewall blocks queries containing injection-like patterns
- Service unavailability or payment failure returns HTTP 402 or 503
- Malformed query object (missing required 'query' field) returns a validation error

## 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/security-audit-dag)

## Output

Returns a filtered list of matching MCP servers or A2A tools from the 500+ indexed catalog, including endpoint metadata, capability descriptions, and routing information, with prompt-injection filtered results and compressed token output.

## 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-8550c96b/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)