# 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 a meta-index of 500+ MCP servers and A2A tools by capability query, returning compressed, firewall-validated tool routing results

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/v1/agent-router?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-aba385f9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WyUUajmwGiiF9PVjWPYG3

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-aba385f9
```

Example prompt: Search the A2A and MCP tool index for any servers that handle SEC filings or company enrichment — I want the best-matched tool with compressed metadata so I can route my agent to it directly.

## When to prefer this

Use this endpoint when an AI agent or orchestration system needs to dynamically discover which MCP server or A2A tool handles a specific capability, rather than hardcoding tool URLs. Especially useful when building swarms that need to self-configure, when you want firewall-validated routing for untrusted tool sources, or when token budget is constrained and you need compressed tool metadata.

## Known failure modes

- Missing or empty query parameter returns a 400 error
- Query matches no indexed tools and returns an empty result set
- Payment not completed via x402 results in a 402 Payment Required response
- Endpoint URL verification target is unreachable or malformed, returning an error flag
- Index may be stale if new MCP servers have not yet been crawled

## 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/agent-router)

## Output

Returns a structured JSON object listing matched MCP servers and A2A tools ranked by relevance, with 85% token-compressed descriptions, capability metadata, routing endpoints, and Prompt-Guard firewall validation status for each result.

## 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-aba385f9/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)