Context Passport is an open standard developed for structuring and verifying records of AI agent events. It addresses the challenge of inconsistent formats when AI agents exchange context, which can lead to incompatibility, unverifiable audit trails, and schema drift in multi-agent systems. The standard defines a minimal, versioned envelope schema that records who sent the event, what it contains, and ensures its integrity, while leaving the payload contents open for agents to define according to their needs.
The schema is designed to be model-agnostic and cryptographically verifiable, using SHA-256 parent hash chaining so that any party can confirm the integrity of the event chain without relying on a trusted intermediary. Each agent in a workflow receives a "passport," performs its task, and commits a new event, which hashes the previous event to build a tamper-evident chain. Key fields in the schema include unique identifiers, agent attribution (such as agent ID, name, role, provider, and model), event types (like commit, fork, checkpoint, audit, spawn), and payload sections for input, output, memory, and variables. The schema is implemented in JSON with a fixed structure, requiring no SDK, and can be used with any orchestration framework, model provider, or programming language.
0 license, making it public domain with no copyright or restrictions. 0 license, including an explicit patent grant. The standard is governed by the community, with a commitment to backward compatibility and forward-compatible extensions that are safely ignored by existing implementations. It is intended for teams building multi-agent AI systems who need a reliable, interoperable, and verifiable format for exchanging context between agents.
In the Testing & QA space, context-passport-conformance takes a focused approach. It focuses on ensuring implementations of the Context Passport standard conform to specifications through automated testing. It is built as an open-source project for developers building Context Passport integrations. context-passport-conformance is open source under the Apache-2.0 license. context-passport-conformance is available on the web and the command line.
contextpassport builds and maintains context-passport-conformance, and the product first shipped in 2026. Development happens publicly on GitHub with 11 commits in the last 90 days. PulseGate's similarity index finds few close equivalents — context-passport-conformance occupies a relatively distinct niche. Key capabilities include conformance testing, open standard support, and test runner.
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