Most APIs want an account, a card and a monthly plan before you make one call. That model breaks for AI agents, which need to call a tool once, pay a cent, and move on.
Highland Intel's small utility APIs use x402: the server answers 402 Payment Required with a price, the client pays in USDC on Base, retries, and gets the result. No signup, no API key.
What is live
- DNS records lookup: 1.5 cents per call
- Email auth check (SPF, DKIM, DMARC)
- HTTP security header audit, HTTPS redirect check, security.txt check
- Uptime check, JSON Schema validate, regex tester, cron explainer, text diff, hash
The full catalog has 70 APIs at 1 to 5 cents per call: https://api.highlnd-intel.group/v1/catalog (OpenAPI: https://api.highlnd-intel.group/openapi.json)
For agents
There is an MCP endpoint at https://api.highlnd-intel.group/mcp, so Claude, Cursor and other MCP clients can discover the tools directly.
For humans
Pay with any wallet on the buy page: https://api.highlnd-intel.group/buy
Feedback welcome, especially on which tools you would actually pay a cent for.
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