jblaz6335/mcp-server-aidatamarketplace

Decision-ready machine-to-machine reports paid per request with the **x402 Payment Protocol** on **Base Mainnet**.
**No API key. No account. No subscription.** Buy one current answer in USDC when a workflow needs it. The catalog includes agent-readiness audits, vendor onboarding risk, transaction preflight, live x402 opportunity research, company intelligence, endpoint verification, website due diligence, VIN safety, market checks, security research, and atomic EVM reads.
Every billable route accepts ?preview=true. The preview is a live contract proof showing the source, freshness, required inputs, and response shape. It deliberately withholds the decision-ready values delivered by the paid call.
Start with the free find_marketplace_products MCP tool. Give it the buyer's task in plain language and it returns three ranked live products plus one recommended_purchase containing the exact price, required inputs, and ready preview and paid-call payloads. Replace the example inputs with the buyer's real values, preview when available, and only use the paid call after the user authorizes the listed price and payment method.
Engineering overview
This repository contains the open-source MCP buyer adapter and client. The marketplace backend is a separate service.
The adapter derives tools from the service's OpenAPI contract, keeps signing keys local, and rejects disabled, conflicting, malformed, and over-cap payment requests. Inspect payment flow, client examples, and automated verification.
Install
Use it from any stdio-compatible MCP client:
Official MCP Registry name: io.github.jblaz6335/ai-data-marketplace.
Small tool list for existing agents
Set X402_TOOL_MODE=compact to expose just find_marketplace_products and purchase_marketplace_product. All live products remain available through those two tools. The default full mode keeps the product-specific tools for existing integrations.
No environment variable or wallet key is required to start the default server. A wallet is needed only if the buyer chooses locally signed auto-pay. The remote /mcp URL is a separate authenticated publisher integration, not the public stdio install URL.
Ready-to-copy configurations and a free end-to-end client check are in examples/README.md. The check discovers a real product and requests its free preview. It never signs or submits a payment.
Buy with credits instead of configuring a wallet
The service is already indexed in APIHub's external x402 catalog. Buyers with APIHub credits can ask its proxy to sign and settle a marketplace call without keeping a Base wallet or gas in the calling process:
APIHub is an independent third party with its own account, credit, markup, and terms. Direct x402 remains the self-custody path. Both routes settle the protected endpoint before its paid result is delivered.
Inspect a live contract
The proof includes source, freshness, request parameters, top-level fields, response shape, and a purchase block. Decision-ready values remain in the paid result.
Optional one-call purchasing
The current npm release can complete the x402 challenge, authorization, retry, and settlement automatically. Install the public package directly:
The buyer key stays inside the local MCP process and is never sent to the marketplace. Use a dedicated low-balance Base wallet, not a primary wallet.
Call a product with auto_pay: true. The adapter refuses disabled, conflicting, invalid, or over-cap purchases. It never falls back to an uncapped payment.