Changelog
What shipped in InterfaceDelta, newest first. Each entry is a change you can see in the product. Changes to the services you watch are in Decisions, not here.
November 2026
1 entry
CLI and GitHub Action 0.4.0 release candidate: dependency policy exports
The release candidate exports checked dependencies as a generic allowlist or GitHub managed MCP settings. The CLI also supports offline exports that mark every entry for review; the Action can save the policy as a workflow artifact. Repository credentials are called watch tokens, created in Routing → Watch tokens. This candidate is not yet published.
October 2026
4 entries
CLI and GitHub Action 0.2.1: fingerprints match on every machine
The CLI and the GitHub Action now produce identical fingerprints on every machine locale. Monitors also confirm changes that happened while a discovery source was unreachable, once it reads again.
CLI and GitHub Action 0.2.0: one dependencies file for several services
A dependencies file can now cover several services at once. Decision rules can name an owner and carry acceptances that expire, checks can run signed in, and results export as SARIF.
Decision cards on Monitors
Monitors now show decision cards for each change, with optional AI-written notes that cite the evidence behind them.
The public atlas of agent interfaces
The public atlas of agent interfaces is open. Browse the interfaces InterfaceDelta has observed and their recorded histories.
September 2026
17 entries
· Improved
More accessible workflow and WebMCP views
The 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.
· New
Your workflows in Impact Briefs
Each 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.
· New
Alert emails name the workflows a change affects
When 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.
· Fixed
MCP servers that reject the discovery handshake
An MCP server that answers the optional discovery request with HTTP 400 is now inspected through the standard initialize handshake, so its tools are listed instead of the server appearing unreachable.
· New
Workflow change relevance
Describe a workflow and the services, endpoints and capabilities it depends on, and InterfaceDelta shows for each dependency whether it changed, showed no change, or cannot be evaluated from the evidence. Profiles are private to your account.
· New
Monitor WebMCP tools on a specific page
A monitor can now watch one page of a site, not just its homepage, for declarative WebMCP form tools. Each watched page counts toward your monitor limit.
· New
Payment requirements declared in OpenAPI documents
Operations that declare x-payment-info now show their payment method, intent and currency, and an operation that newly declares payment is flagged as a breaking change. Declarations are publisher-stated and never paid or verified.
· Improved
WebMCP detection on the page you inspect
Inspecting a URL with a path now also reads that exact page for declarative WebMCP form tools, so demos and tools that live below the homepage are found.
· New
WebMCP tools in the Passport
Declarative WebMCP form tools are now part of the Passport (schema 0.5.0) and are tracked for changes like other capabilities. CLI and GitHub Action baselines recorded before 0.5.0 need to be regenerated.
· New
MCP Apps detection
MCP tools that declare an interactive MCP Apps UI are now recorded and shown on the Passport page. The UI itself is never fetched or rendered.
· Improved
Change records say what changed
Where the retained evidence supports it, Passport change records and alert emails now name the exact change, such as a property that became required, instead of only reporting a changed hash.
· Improved
Sharper Impact Brief guidance and layout
Impact Briefs now ask for a fresh observation only when the evidence is actually incomplete, and PDF downloads no longer spill a lone section onto an extra page.
· Fixed
MCP endpoints that require payment
An MCP endpoint that answers HTTP 402 is now reported as payment required instead of unreachable. InterfaceDelta never offers or makes a payment.
· Improved
A clearer monitoring workspace
The monitoring workspace and Watchlist Signals are now compact and scannable, email preference controls are easier to use, and Impact Brief downloads carry InterfaceDelta branding.
· Fixed
Accurate classification for services with no detected capabilities
A Passport now distinguishes a confirmed empty capability inventory from an incomplete inspection. Surfaces must resolve as observed or definitively absent, and retained inventory evidence must satisfy the completion checks.
· New
Versioned Impact Brief downloads
Download any Impact Brief as Markdown or PDF with a stable, versioned layout you can archive or share.
· New
Deterministic Impact Briefs for monitored changes
Watchlist Signals now include a rule-derived brief that explains what changed and what to check next, with no model in the path.