SettlementWitness
Add a deterministic MCP verification gate so agent execution and x402 settlement claims are witnessed before money or authority moves.
Overview
SettlementWitness is an MCP server for the Ship phase that provides a deterministic verification gate for agent execution and x402 settlement over streamable HTTP.
What is this MCP server?
- Deterministic verification gate for agent execution claims
- x402 settlement witnessing via remote MCP
- Streamable-http endpoint at https://defaultverifier.com/mcp
- Open-source verifier repo: github.com/nutstrut/default-settlement-verifier
- Server version 1.0.0 per MCP registry metadata
- MCP server version 1.0.0
- Remote endpoint: https://defaultverifier.com/mcp
- Repository: github.com/nutstrut/default-settlement-verifier
What problem does it solve?
Agentic payment flows break trust when settlements depend on the model saying it did the work, with no deterministic witness.
Who is it for?
Solo builders shipping autonomous agents with machine payments or x402 settlement who need a verification MCP, not honor-system logging.
Skip if: Traditional e-commerce with no agent execution layer, or products that do not use settlement protocols requiring external attestation.
What do I get? / Deliverables
After registering the MCP remote, your stack can route execution and x402 settlement through SettlementWitness so only witnessed claims proceed.
- Registered SettlementWitness MCP remote (v1.0.0)
- Deterministic verification step in agent execution and settlement pipelines
- GitHub-aligned verifier implementation reference for customization
Recommended MCP Servers
Journey fit
How it compares
Deterministic settlement-witness MCP, not a generic testing framework or marketplace skill.
Common Questions / FAQ
Who is SettlementWitness for?
Developers building agentic commerce or x402 settlement paths who need an external, deterministic verifier callable from MCP agents.
When should I use SettlementWitness?
Use it while integrating paid agent actions in build, and mandatorily before ship when autonomous settlements could move value without human review.
How do I add SettlementWitness to my agent?
Configure the streamable-http MCP server at https://defaultverifier.com/mcp in Claude Code, Cursor, or your host, then call verifier tools from your agent settlement workflow.