Public signals
See what is actually exposed.
Machine-facing infrastructure
Build deeper layers.
Infrastructure and interfaces for machines to discover, understand, evaluate, and act on the public web.
Product / Evidence to action
OnTheStacks Machine Presence Agent
Know what to change.
Verify what changed.
Enter a public website. The Agent turns Machine Presence evidence into prioritized findings, an approved remediation plan, implementation-ready artifacts, and verification.
You approve the work. You control what gets published.
- 01
Prioritized findings
Confirmed issues separated from limitations and unknowns.
- 02
Remediation plan
What to address first, why it matters, and what should change.
- 03
Implementation-ready artifacts
Approved schema, metadata, configuration, or other bounded remediation output.
- 04
Verification
Reinspect the site and compare the evidence before and after.
Product
OnTheStacks Machine Presence Inspector
Inspect how a public website presents itself to machines.
OnTheStacks Machine Presence Inspector evaluates publicly observable signals across identity, structure, crawler policy, interfaces, and actionability, returning structured observations tied to source evidence.
- Access
- Retrievability of public resources.
- Identity
- Canonical URLs and consistent entity signals.
- Structure
- Semantic content and structured data.
- Policy
- Crawler directives and access rules.
- Interfaces
- Declared tools, APIs, and connection paths.
- Actionability
- Clear, supported next steps.
Inspect a public website
Process
How OnTheStacks Machine Presence Inspector works
Evidence-bound
Carry the source with the observation.
Machine-callable
Expose clear inputs and structured returns.
Evidence
Machine-readable evidence
Structured observations include the assessed signal, source evidence, a qualified status, and the time of the check.
- 01
Public signal
What the website exposes.
- 02
Observation
What was assessed.
- 03
Source evidence
Where the finding comes from.
- 04
Qualified status
What the evidence supports.
Status vocabulary
- Present
- Absent
- Conflicting
- Inaccessible
- Unknown
What cannot be verified stays unknown.
System
How the OnTheStacks system works
Evidence grounds the tools. OnTheStacks Agents organizes those capabilities; machine interfaces expose them to developers and systems.
- 01 / Evidence
Public evidence
Sources and observations.
- 02 / Tools
Callable tools
Bounded operations.
- 03 / Agents
OnTheStacks Agents
Shared capabilities.
- 04 / Access
Machine interfaces
Documented contracts.
Interfaces
Human and machine interfaces
Two access surfaces. The same inspection capability and underlying evidence.
Human interface
OnTheStacks.dev / Inspector UI
A public URL goes in; a readable, evidence-backed report comes back.
Machine interface
Callable tool / MCP interface
A URL argument goes in; structured observations and their sources come back.
MCP endpoint
https://mcp.onthestacks.dev/mcpOnTheStacks Machine Presence Inspector is machine-callable. Connect through MCP using the same inspection engine and evidence contract.
Commercial / Collaboration
BUILD with OnTheStacks
Commercial access, integrations, partnerships, and custom deployments for serious product work.
Start a build conversationOnTheStacks
Same root. Deeper layers.
Built for humans to understand. Structured for machines to read.
OnTheStacks Machine Presence technology · Patent Pending
OnTheStacks
- website
- https://onthestacks.dev/
- focus
- Machine-facing infrastructure and interfaces
OnTheStacks Machine Presence Agent
- status
- Public preview
- purpose
- Turn website inspection evidence into a prioritized remediation plan, approved artifacts, and verification.
- interface
- Human web interface
- capabilities
- https://agent.onthestacks.dev/capabilities.json
workflow
- 01
Inspect a public website.
- 02
Prioritize findings and prepare a remediation plan.
- 03
Obtain your approval for selected actions.
- 04
Prepare the approved remediation artifacts.
- 05
Reinspect after you publish changes.
- approval
- Required before generating selected artifacts.
- publication
- You review and publish through your own workflow.
- website-editing
- The Agent does not modify external websites.
- machine-access
- No public autonomous Agent API in V1.
- consent
- Required before the submitted URL and inspection evidence are processed by OpenAI.
OnTheStacks Machine Presence Inspector
- purpose
- Inspect how a public website presents itself to machines.
- mode
- Read-only
- scope
- Public HTTP and HTTPS URLs
- human-interface
- https://onthestacks.dev/#inspector
- machine-interface
- MCP
observation-groups
- Access
- Retrievability of public resources.
- Identity
- Canonical URLs and consistent entity signals.
- Structure
- Semantic content and structured data.
- Policy
- Crawler directives and access rules.
- Interfaces
- Declared tools, APIs, and connection paths.
- Actionability
- Clear, supported next steps.
- retrieval
- No sign-in, site JavaScript execution, cookies, or form submissions to inspected websites.
Machine-readable evidence
- public-signal
- What the website exposes.
- observation
- What was assessed.
- source-evidence
- Where the finding comes from.
- qualified-status
- What the evidence supports.
- checked-at
- When the inspection took place.
statuses
- PRESENT
- ABSENT
- CONFLICTING
- INACCESSIBLE
- UNKNOWN
- uncertainty
- What cannot be verified stays unknown.
- limitations
- An oversized or inaccessible response is an inspection limitation, not proof that a site is not machine-ready.
- interpretation
- Published declarations do not prove truth, permission, or working connectivity.
OnTheStacks system
- public-evidence
- Sources and observations.
- callable-tools
- Bounded operations.
- agents
- Shared capabilities.
- machine-interfaces
- Documented access to those capabilities.
- consumers
- Developers and systems.
MCP connection
- product
- OnTheStacks Machine Presence Inspector
- protocol
- MCP
- transport
- Streamable HTTP
- endpoint
https://mcp.onthestacks.dev/mcp- tool
inspect_machine_presence- input
- url: public HTTP or HTTPS URL
- output
- Structured observations, source evidence, statuses, timestamps, and limitations.
- authentication
- No account or API key required for the public MCP interface.
- documentation
- https://onthestacks.dev/connect.html
- consistency
- The human Inspector and MCP interface use the same inspection engine and normalized result contract.
Public discovery resources
- orientation
- https://onthestacks.dev/llms.txt
- crawler-policy
- https://onthestacks.dev/robots.txt
- agent-crawler-policy
- https://agent.onthestacks.dev/robots.txt
- agent-site-map
- https://agent.onthestacks.dev/sitemap.xml
BUILD with OnTheStacks
- inquiries
- Commercial access, integrations, partnerships, and custom deployments.
Same root. Deeper layers.
Built for humans to understand.
Structured for machines to read.