API Development MCP Servers for Claude Code

Public webhook inboxes for agents. Receive OAuth redirects, payment callbacks and CI notifications.

Register an event callback address.

Find and call verified APIs from any AI assistant, with free trial calls and previewed writes.

Validate emails, phones, IBAN, VAT; look up IPs and companies; rates, holidays, time via Abstract.

Webhook, email and DNS inboxes for AI agents to capture callbacks and test integrations.

Evidence-cited machine-readable contracts for how agent platform APIs really behave