Inspect
InterfaceDelta looks at the public machine-readable interfaces a service exposes to AI agents—including ARD, A2A and MCP.
It observes metadata and capabilities without executing tools or reading private resources.
Inspect · Understand · Interface
The machine-readable interface, made legible.
See the machine-readable interface an AI agent sees. Understand the protocols and capabilities a service exposes. Monitor that interface for changes that could break downstream agents.
No service handy?See a representative sample Passport →Static example · no network scanInspect the live InterfaceDelta demo →Live controlled service · you start the scan
The product model
Inspect, understand, interface
Understand
InterfaceDelta turns those observations into a canonical Passport: what protocols exist, what capabilities they advertise, how access behaves, and what the service exposes right now.
Interface
Save a target and InterfaceDelta observes it again over time. When the machine-readable interface changes, InterfaceDelta compares the observations and explains what changed.
Why it matters
Software interfaces change. Agents depend on them.
AI agents increasingly depend on machine-readable services to discover tools, resources and other agents. Those interfaces can change without a website going offline.
A tool may disappear. A schema may change. An endpoint may begin requiring authentication. A service may publish metadata that no longer matches what it actually exposes.
InterfaceDelta records those machine-readable surfaces and compares them over time, so developers can see when the interface an agent depends on has changed.
A simple record across time
From public service to explained change.
- Public service
- ARD · A2A · MCP
- InterfaceDelta Passport
- Recurring observation
- What changed?
The record
What is InterfaceDelta?
InterfaceDelta is the observability and compatibility layer for machine-readable software interfaces.
InterfaceDelta observes the public machine-readable interfaces software exposes to AI agents and normalizes what it sees into a Passport: a structured record that can be understood, revisited and compared over time.
Traditional uptime monitoring can tell you that a server still responds. InterfaceDelta asks a different question: does it still expose the same machine-readable interface?
That difference matters because tools, schemas, endpoints, authentication requirements and advertised capabilities can change while the host remains online.
Inspection
What does this service expose right now?
Monitoring
What changed since the last observation?
Inspection is a snapshot. Monitoring adds time. When you choose to monitor a target, InterfaceDelta revisits its public machine-readable interface, records a new Passport, compares it with the previous observation, and can notify you about qualifying compatibility changes. The current beta cadence is approximately 24 hours.
Product updates
What’s new
- More accessible workflow and WebMCP viewsThe workflow editor now moves keyboard focus predictably, labels every control for screen readers and announces errors, and the workflow and WebMCP sections name what they describe.
- Your workflows in Impact BriefsEach Impact Brief on the monitoring page now shows which of your saved workflows the change touches. Downloaded briefs stay unchanged and never include workflow details.
- Alert emails name the workflows a change affectsWhen a monitored change touches one of your saved workflows, the alert email now names the workflow and dependency. Every alert also links to your workflow view, and nothing is ever filtered out.
For developers
Built for interfaces machines read.
InterfaceDelta uses deterministic protocol observation, canonical normalization and versioned comparison rules to make agent-facing interfaces inspectable across time.
Explore developer integrations →Inspect what a service exposes now.
Run a passive inspection against a public service and see the Passport InterfaceDelta produces.