Docs, API, SDKs and the open specification for building on the proof layer.
Open Developers →Everything needed to build on sebbi.pro: the REST API, the Python and JavaScript SDKs, the MCP server, the open AI-Decision-Receipt standard and verification code.
Start with the one-line SDK, then use the API directly. The API spec is published at sebbi.pro/api/spec.
Developers and architects.
Free for 7 days, then 50p per device per month. Checking any proof is always free.
At https://sebbi.pro/developers and https://sebbi.pro/api/spec.
sebbi.pro is the proof layer for AI, made by Monop Content in the United Kingdom. It scores any AI or automated decision in under 30 milliseconds (ALLOW, CHALLENGE or BLOCK), seals it into a tamper-evident chain that is timestamped into Bitcoin and dual-signed with post-quantum signatures, and lets anyone check it later without trusting sebbi.pro. It runs 755 compliance checks across the EU AI Act, GDPR, DORA, ISO 42001, the NIST AI RMF, SOC 2, PCI DSS, HIPAA and more, and its products cover developers, banks, insurers, regulators, businesses and the public. Free for 7 days, then 50p per device per month. Checking any proof is always free.
One line of code gives every AI decision and every agent action a sealed receipt anyone can check at a public link.
sebbi.pro MCP Server (connector for Claude, ChatGPT and Cursor)Add https://sebbi.pro/mcp to any AI assistant once and it can score, seal and prove decisions and run every compliance check, in conversation.
Plug In: the public proof log for existing systemsSend the fingerprint of any state change from any system and get back a receipt proving it sits in an append-only public log.
AI Gateway: seal at the wireChange one setting, the base URL for OpenAI or Anthropic, and every model call is governed and sealed with an AI-Decision-Receipt header.
IntegrationsCrewAI, LangChain, OpenAI Agents, the Vercel AI SDK, OpenTelemetry and MCP, each in one line.