I will connect one external REST API or webhook provider to an existing Node.js backend, or deliver a focused standalone Express or Fastify service.
You receive:
• Up to three API endpoints for one provider
• Schema and input validation with structured error handling
• Secure environment-variable configuration
• Webhook signature verification when applicable
• Five automated Jest or Vitest tests
• A Dockerfile or clear local run instructions
• A concise README and one revision
Good fit for payment or stablecoin providers, SaaS integrations, CRM, notifications, analytics, AI APIs, webhook receivers, and event processing.
Scope: one provider, up to three endpoints, one environment, and one documented workflow. Delivery in five days. Production hosting, paid third-party services, large frontends, smart-contract audits, data migration, and ongoing maintenance are separate.
I work with public documentation, sandbox credentials, or sanitized examples only. Never send private keys, seed phrases, production wallet credentials, or live customer data.
