X402-BROKER Agent Tool Marketplace

x402

X402-BROKER Agent Tool Marketplace is a paid API for AI agents from mcp-gateway.agentdiet.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Searches and routes requests across 31,390+ MCP servers, x402 APIs, and A2A agents, returning ranked tool results with USDC-settled execution via x402 protocol on Base.

Price / call$0.01

Seller volume →—

Success—

StatusUnknown

How this service works

Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://mcp-gateway.agentdiet.dev settling in USDC on Base.

Output

Returns a JSON object with a 'status' field ('ok'), a 'data' object containing matched tool/agent/MCP-server listings relevant to the query, and an 'roi_proof' object with a compression_ratio_pct (e.g. 91.4) indicating how much the response was distilled from the full marketplace index.

Example use cases

Discover web-scraping agent tools

“Search the agent marketplace for tools or MCP servers that can scrape and extract data from websites — I want to find the best option my agent can use right now.”

Find payment-capable A2A agents

“Can you look up which A2A agents or x402 APIs in the marketplace support sending or processing USDC payments? I want to wire one into my agent workflow.”

Route to a code-execution MCP server

“Search for MCP servers in the agent tool marketplace that can execute Python code snippets — list me the top options so I can pick one to add to my agent.”

Technical details

Endpoint

GEThttps://mcp-gateway.agentdiet.dev/v1/agent-tool-marketplace?utm_source=zero.xyz

When to prefer

Choose this endpoint when an AI agent needs to discover, search, or route to one of 31,390+ MCP servers, x402 APIs, or A2A agents from a single brokered interface. Prefer it over direct MCP registries or manual API directories when you want deterministic routing with USDC micropayment settlement on Base, especially in agentic pipelines that require pay-per-call access without long-term API key management.

Side effects

Missing or malformed 'input' object returns a 400-style error
Query string absent returns empty or generic results
Payment not settled in USDC on Base returns 402 Payment Required
x402 protocol handshake failure prevents access
Overly broad or ambiguous queries may return low-relevance tool listings
Downstream MCP server unavailability may reduce result completeness

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {},
    "status": "ok",
    "roi_proof": {
      "compression_ratio_pct": 91.4
    }
  }
}

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