"Payments" matching MCP connectors:

Web/PDF extraction and API comparison. x402 payments or prepaid comparison credit. Free discovery.

Surface contracts: API behavior evidence, x402 pre-payment check, MCP server preflight

Hosted MCP infrastructure with seven typed tools: JSON repair, JSON Schema validation, JSON to TypeScript, CSV to JSON, JSON to CSV, OpenAPI security and webhook checks. Public tool discovery; execution uses scoped Bearer keys with tool allowlists, quotas and request IDs. Free deterministic calls, no LLM calls or USDC payments. Runnable repair → validate → CSV example: https://invokeport.com/agents/workflows/json-pipeline. MCP through 2025-11-25; custom headers, no OAuth.

Test Paddle Billing in sandbox: pricing, subscriptions, payments, webhooks and event simulations.