Highland API documentation
Highland API is a catalog of 70 small, fast APIs for intel, text, data and agent work: DNS, email auth, RDAP lookups, hashing, PII redaction, classification, web fetch and more. You only pay for calls that succeed. There is no subscription to start, no sign-up form and no ID check.
You can use every API in three ways:
REST + API keyCreate a key in one request, top up credits with USDC, then call any API with curl, Python or JavaScript.
MCP toolsPlug the whole catalog into Claude, ChatGPT, Grok, Cursor or VS Code as tools. One URL, one key.
x402 pay-per-callNo account at all. Your agent gets HTTP 402, pays in USDC on Base and retries. Built for autonomous agents.
Start here
- Quickstart: your first paid call in about 60 seconds.
- API keys: create, store, rotate and revoke keys.
- Credits and pricing: how 1 credit = 1 CAD cent works, and why failed calls are free.
- Buy credits with USDC: the exact top-up flow, step by step, from any wallet.
- Wallets: browser wallet, phone wallet, or a manual send. What an address is for, and what we never store.
Save money
- Monthly plans: Solo and Builder give bonus credits every 30 days.
- Coupons: redeem a code for free credits.
- Referrals: share your link. When someone you refer buys their first plan, you get a free month.
- Affiliates: earn a commission on every sale you send.
Connect your AI
| Client | Guide | What you need |
|---|---|---|
| Claude (claude.ai, Desktop, Code, Messages API) | MCP for Claude | API key |
| ChatGPT, OpenAI Responses API, Agents SDK | MCP for OpenAI | API key |
| Grok (xAI API, xAI SDK) | MCP for Grok | API key |
| Cursor, VS Code, Windsurf, any MCP client | Editors and other clients | API key |
| Autonomous agents with a wallet | x402 | USDC on Base |
Base URLs
| What | URL |
|---|---|
| REST API | https://api.highlnd-intel.group/v1 |
| MCP (Streamable HTTP, header auth) | https://api.highlnd-intel.group/mcp |
| MCP (key in path, for clients that cannot send headers) | https://api.highlnd-intel.group/mcp/<YOUR_KEY> |
| Catalog (JSON, free) | https://api.highlnd-intel.group/v1/catalog |
| x402 discovery (free) | https://api.highlnd-intel.group/.well-known/x402 |
| Buy credits (web) | https://api.highlnd-intel.group/buy |
| Health (free) | https://api.highlnd-intel.group/health |