# 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 to 500+ MCP servers and A2A tools via a single meta-router connection, with token compression and prompt injection firewall protection.

## Facts

- Endpoint: POST https://json-repair.agentdiet.dev/v1/swarm-router?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-669c2fce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yVBG3MRnoImRxUHAL8961

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-669c2fce -d '<json body>'
```

Example prompt: Search the swarm router for any MCP or A2A tools that handle SEC filings and company lead enrichment — I want to know which agents are available and what they can do.

## When to prefer this

Use this endpoint when an agent needs to discover which of 500+ MCP servers or A2A tools can handle a specific capability, rather than hardcoding tool URLs. Ideal for dynamic agent orchestration pipelines where the right downstream tool is not known in advance. Prefer over manual tool registries when you need token-compressed, firewall-guarded routing in a single API call.

## Known failure modes

- Empty or too-vague query string returns no matches or low-confidence results
- Unknown endpoint URL passed as query may return unverified or empty result
- Firewall may block or flag queries that resemble prompt injection attempts
- Payment failure via x402 returns HTTP 402 with no result
- Upstream MCP servers may be offline, returning partial or stale index data

## 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/swarm-router)

## Output

Returns a JSON object listing matching MCP servers or A2A tools relevant to the query, including their names, capabilities, and routing metadata, filtered through a Prompt-Guard firewall to prevent prompt injection attacks.

## 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-669c2fce/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)