ARD trust manifest

A trustManifest binds catalog entries to a verifiable identity so clients can check who published them.

Category: Discoverability
Standard: Emerging; Off by default, turn on in settings

0%Top 100 adoption0 of 100 sites implement it 0/9OverviewStalledNo meaningful support, or vendors have said no.

Who supports it

No agent or browser has announced support yet.

27 others: no evidence yet. See every agent and browser

What it checks

For each entry in the site’s ARD catalog, the extension checks for a trustManifest object with a string identity. It does not verify the identity itself; it only checks that one is declared.

Results

Status	When
Pass	Every entry declares a `trustManifest` identity
Warn	Some entries declare one and some do not
N/A	No entry declares a `trustManifest`
N/A	There is no ARD catalog, it could not be read, or it has no entries

How to fix

Add a trustManifest to each entry, with an identity that matches the publisher domain in the entry’s identifier, such as a did:web identifier:

{
  "identifier": "urn:air:example.com:mcp:main",
  "displayName": "Example MCP server",
  "type": "application/json",
  "url": "https://example.com/.well-known/mcp/server-card.json",
  "trustManifest": {
    "identity": "did:web:example.com"
  }
}

Support by agent and browser

Announced means the vendor’s own docs or announcement say so. Published is the date on the vendor’s own page, where it has one. Checked is the last time our weekly research found that page still saying so.

No agent or browser has announced anything about this yet.

No evidence yet27

ChatGPT
Claude
Gemini
Perplexity
Copilot
Meta AI
ChatGPT Atlas
Comet
Dia
Gemini in Chrome
Edge Copilot Mode
Claude Code
Cursor
Codex
GitHub Copilot
Windsurf
CCBot
Applebot
Amazonbot
Bytespider
Cohere
Mistral
DuckAssist
Chrome
Edge
Firefox
Safari

Names and marks belong to their owners and are used only to identify products. None of these vendors is affiliated with Sitebulb. Spotted something out of date? Send a correction.

Adoption on the top 100 sites

0 of 100 measured sites implement it

Scanned 23 Oct 2026 with the Sitebulb Labs extension, against the Tranco list (tranco-56Z8N).

9 Oct 2026 0% → 23 Oct 2026 0%

Overview

0/9

Stalled

No meaningful support, or vendors have said no.

How this rating is worked out0 of 9 points

Factor	Points	Why
Vendor support	0 / 3	0 vendors supporting, 0 partly or planned
Top-100 adoption	0 / 3	0% of measured sites
Spec maturity	0 / 3	Community proposal

8 or more points is Established, 5 to 7 is Gaining traction, 2 to 4 is Speculative and under 2 is Stalled. A feature is also Stalled when more vendors have said no than yes. Read the spec.

Community insights

No community insights for this feature yet.

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