Ledger serves an AI Catalog
manifest at /.well-known/ai-catalog.json on developers.ledger.com, declaring
5 agentic resources
that a discovery service can index without asking anyone’s permission.
Run against this exact body with the project’s own
conformance CLI.
Declared identity
404
did:web:developers.ledger.com —
resolving it returns 404. A did:web: that does not resolve is a string, not an identity, and does not earn the identity affordance here.
Discovery path
predecessor
Answered only at /.well-known/ai-catalog.json. ARD v0.91 renamed the path to /.well-known/ard.json and made the old one an optional courtesy, so a consumer implementing only the current spec will not find this manifest.
Declared spec version
1.0
The specVersion in the manifest. 1.0 is current for the AI Catalog data model; anything lower is an earlier draft. ARD reads this field as transport-defined and ignores it.
Optional affordances missing. None of these break a client, but each one costs the publisher search relevance or verifiability.
Search Ledger developer documentation, fetch full page content, browse the documentation section tree, and retrieve Ledger AI coding skills, all from developers.ledger.com.
Maps informal developer intent and natural language to the correct Ledger Device Management Kit (DMK) components, operations, and API methods, for requests that are ambiguous, incomplete, or phrased in terms of outcomes rather than API methods.
Executes Ledger Device Management Kit (DMK) signing operations safely: initialize the SDK, establish a device session, verify device state, open the correct chain app, perform signing or device management operations, and return the result.
“check the balance of a Ledger hardware wallet from the command line”
“run a swap quote using the Ledger wallet CLI”
“discover accounts on a connected Ledger device via CLI”
How it is served
The publishing guide asks for three things at the transport layer, because a crawler is the
consumer that matters and a crawler is a browser-shaped client.
HTTPS only — yes (HTTP 200)
Content-Type: application/json —
yes
Access-Control-Allow-Origin: * —
yes
Evidence. Fetched https://developers.ledger.com/.well-known/ai-catalog.json on 2026-09-13, HTTP
200. The verbatim body is stored alongside its manifest in the
Ledger repository
as ai-catalog/ledger-ai-catalog.json. Nothing on this page is derived
or generated: an AI Catalog manifest is served from the publisher’s own domain or it does not
exist, which makes it — like an
A2A Agent Card — one of the few agent artifacts that cannot be
produced on a provider’s behalf. Grades are recomputed on every build; the specification is a
v0.9 draft and
these verdicts will move when it does.
Every descriptor here is available over the APIs.io API and to AI agents over MCP. Agent Discovery is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for agent discovery
3 MCP tools reach this
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.
Discovery needs no key. Ratings and market analysis are Pro.
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