Capability registry

What decouvrant.fr declares an agent can do

Measured 2026-11-02 19:02 UTC from the declarations the site publishes (record s4pb1jfolo). Each capability is shown as declared, under the policy class that decides whether anything may call it, beside what a call observed.

13declared

0public read-only

0called and verified

0declared ≠ observed

a2a, api, mcpprotocols

Unknown 10 · Metadata 3

Declared versus observed

Capability	Policy class	Declared	Observed
https://www.decouvrant.fr/mcp api · https://www.decouvrant.fr/mcp	Metadata never called automatically	an API the catalog lists; its operations are in its own description auth: unknown	not attempted metadata: describes a surface, is not itself an action
https://www.decouvrant.fr/a2a api · https://www.decouvrant.fr/a2a	Metadata never called automatically	an API the catalog lists; its operations are in its own description auth: unknown	not attempted metadata: describes a surface, is not itself an action
https://www.decouvrant.fr/ask api · https://www.decouvrant.fr/ask	Metadata never called automatically	an API the catalog lists; its operations are in its own description auth: unknown	not attempted metadata: describes a surface, is not itself an action
presenter_decouvrant mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
obtenir_offre mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
references_publiques mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
communes_couvertes mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
lister_pages mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
lire_page mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
chercher_dans_le_site mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
ask mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
preparer_demande_audit mcp	Unknown never called automatically	its effect is not stated in the declaration auth: declared	not attempted requires declared: never called without the operator's own credentials
repondre-sur-decouvrant a2a · https://www.decouvrant.fr/a2a	Unknown never called automatically	its effect is not stated in the declaration auth: none	not attempted classed unknown: only read-only public actions are ever called

Where the declaration and the call disagree

None: every capability that was called answered as declared.

Signed certificate

This page’s rows, signed by the observer’s Ed25519 key: every capability’s id, endpoint, safety class, policy class and observed state, the declaration hashes and the record’s sealed manifest. The certificate is derived from the record alone, so the same record always yields the same id.

certificate_id ccap1:7e8713dc659b330874f95ced5b1d673e38cdcf337f124f799ff8846960464724
alg Ed25519 · kid 1hHmE3fo1rg5Ig70wuFtJ5wBc7G-sUTgUJkxyPWFRps
sig iSWZ0icSVyhG8yGLa1qFUa5mcLndrdeNcobSdDsCi6STnHEc3IbyDihOoi8mK8pJ3aanMm2e_hlXXj-qqhl0Cg

The certificate as JSON · verify it now · the key directory · machine-readability certificate

To verify it yourself: SHA-256 the certificate object as canonical JSON (keys sorted, no whitespace); the hex digest must equal certificate_sha256 and the id; then check the Ed25519 signature over "crawlcheck-capability-certificate-v1\n" followed by that hex digest, with the key in the directory whose RFC 7638 thumbprint is the kid.

Policy classes

Policy class	Called automatically?	Rule
Public read-only public_read_only	yes, to verify	May be called without credentials. CrawlCheck calls it only to check the declaration: GET with no input, on the scanned origin.
Authenticated read-only authenticated_read_only	never	Never called by CrawlCheck. An agent needs the user's own credentials and consent.
Reversible write reversible_write	never	Never invoked automatically. Needs the owner's written authorisation and a test account.
Irreversible write irreversible_write	never	Never invoked automatically. Deletes or changes something that cannot be undone.
Financial financial	never	Never invoked automatically. Moves money or creates a charge.
External communication external_communication	never	Never invoked automatically. Sends a message, email or notification to someone.
Identity and accounts identity	never	Never invoked automatically. Creates, signs in to or changes an account or credential.
Unknown unknown	never	Never invoked. Its effect cannot be read from the declaration, so it is treated as the riskiest case.
Metadata metadata	never	Nothing to invoke: a listing, a server card or a skill file, not an operation.