Sovereign Engine
Sovereign Engine is a pay-per-call MCP server that exposes 15 x402-gated AI agent primitives settled in USDC on Base for developers who need autonomous micropayments instead of API keys.
About
Sovereign Engine is a Model Context Protocol (MCP) server that sells access to 15 paid AI agent primitives through the x402 HTTP 402 payment protocol, settling each tool call in USDC on the Base network. Instead of provisioning API keys or monthly subscriptions, developers connect Sovereign Engine to MCP-aware clients such as Claude Code or Cursor; the server handles pay-per-call pricing so agents autonomously authorize micropayments when invoking primitives. Sovereign Engine targets agentic commerce workflows where software pays software per request using stablecoin rails on Base. Reach for Sovereign Engine when building agents that must buy discrete capabilities on demand without human checkout flows. Each invocation returns the primitive's structured result after x402 negotiates price and confirms USDC settlement. The published manifest scopes the server to 15 x402-gated tools rather than an open-ended API marketplace.
- Exposes 15 x402-gated AI agent primitives as MCP tools
- Settles pay-per-call charges in USDC on Base via HTTP 402
- Connects to Claude Code, Cursor, and other MCP-aware clients
- Replaces API keys with autonomous stablecoin micropayments per call
Sovereign Engine by the numbers
- Data as of Jul 7, 2026 (Skillselion catalog sync)
claude mcp add --transport http sovereign-engine https://api.zuluworksai.com/mcpAdd your badge
Show developers this MCP server is listed on Skillselion. Paste this into your README.
| Transport | HTTP |
|---|---|
| Auth | None |
How do agents pay per MCP tool call with USDC?
Sovereign Engine lets MCP-connected agents call 15 x402-priced primitives and settle each invocation in USDC on Base without API keys.
Who is it for?
Developers building MCP-connected agents that need a fixed catalog of 15 pay-per-call primitives settled in USDC on Base without API key management.
Skip if: Teams that need free unlimited API access, fiat-only billing, or open discovery across hundreds of unrelated x402 endpoints should skip Sovereign Engine.
What you get
MCP tool responses from paid primitives, x402 payment proofs, and USDC settlement records on Base.
- paid primitive tool responses
- x402 payment proofs
By the numbers
- Exposes 15 paid AI agent primitives
- Settles payments in USDC on Base via x402
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Pick Sovereign Engine for a fixed catalog of 15 curated paid primitives; use a generic x402 wallet MCP when you need open-ended discovery across arbitrary x402 endpoints.
FAQ
What is Sovereign Engine MCP?
Sovereign Engine is a pay-per-call MCP server exposing 15 x402-gated AI agent primitives. Each tool invocation is priced through HTTP 402 and settled in USDC on the Base network, so agents pay per call without API keys or subscriptions.
How does Sovereign Engine handle payments?
Sovereign Engine uses the x402 protocol: the server returns HTTP 402 with pricing, the MCP client signs a USDC authorization on Base, and settlement completes before the primitive result is returned to the agent.
How many tools does Sovereign Engine expose?
Sovereign Engine exposes 15 paid AI agent primitives as MCP tools. Each primitive is invoked individually with pay-per-call USDC settlement on Base rather than bundled subscription access.