Onyx Mcp
Connect paid operational APIs—captcha, SMS OTP, DNS, email, URL text, and related checks—to your agent via one remote MCP endpoint on Base x402 USDC.
Overview
Onyx MCP is a MCP server for the Build phase that exposes 12 paid verification and comms tools over x402 USDC on Base for agent integrations.
What is this MCP server?
- 12 paid agent tools exposed over remote streamable-http MCP at onyx-actions.onrender.com
- Micropayments via x402 USDC on Base for per-use captcha, SMS OTP, HLR, DNS, email, and URL text utilities
- Hosted MCP v0.2.0—no local stdio binary required beyond client config URL
- Suites signup flows, phone verification prototypes, and automated QA that needs real SMS or captcha solves
- GitHub source at dimitrilaouanis-tech/onyx-mcp for server metadata and integration notes
- Payments over x402 USDC on Base
- Remote MCP version 0.2.0 at https://onyx-actions.onrender.com/mcp/
What problem does it solve?
Agent-built signup, SMS, captcha, and DNS flows fail in production because local stubs cannot replace paid real-world verification APIs.
Who is it for?
Indie builders prototyping or shipping agent-driven onboarding, telephony validation, or web integrity checks who accept per-call USDC on Base.
Skip if: Hobby projects that need only free mocks, teams blocked from crypto micropayments, or workflows with strict data residency that forbid third-party verification vendors.
What do I get? / Deliverables
After you add the remote MCP URL and x402 wallet funding, your agent can call twelve on-chain-billed tools for live captcha, OTP, DNS, email, and related checks.
- Live captcha, SMS OTP, HLR, DNS, email, and URL-text results inside agent workflows
- Production-shaped verification steps without maintaining separate vendor SDKs per feature
- Documented remote endpoint for repeatable agent integration tests
Recommended MCP Servers
Journey fit
Most builders register Onyx while wiring agent features that call external verification and comms APIs, which is Build integrations, though the same tools support Validate prototypes and Ship-time security checks. Integrations captures multi-tool HTTP MCP access for third-party actions agents cannot fake locally, billed per call rather than as embedded libraries.
How it compares
Remote paid agent API hub over MCP, not a self-hosted open-source skill for local file edits.
Common Questions / FAQ
Who is Onyx MCP for?
Solo builders and agent authors who need real captcha, SMS, DNS, email, and similar utilities billed per use via x402 USDC on Base.
When should I use Onyx MCP?
Use it while building or validating integrations that must hit live verification services instead of hard-coded fake OTP or captcha responses.
How do I add Onyx MCP to my agent?
Register the streamable-http remote MCP URL https://onyx-actions.onrender.com/mcp/ in Claude Code or Cursor, configure x402 USDC on Base funding, then invoke tools from chat.