Nicolas Sitter: AI search research bronze

nicolassitter.com

“Answers questions about Nicolas Sitter's published research on AI answer engines (ChatGPT, Gemini, Perplexity, Copilot, Google AI Mode) and the AI Hotel Landscape dataset: which hotels, chains and sources each AI platform recommends in 56 destinations. Rule-based, read-only, public data. For race results use /a2a/races.

https://nicolassitter.com/.well-known/agent-card.json its card

🇺🇸 US · Amazon.com, Inc. Checked 6d ago extendedAgentCard, pushNotifications, streaming

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Certificate: Issued by Let's Encrypt domain-validated
Valid until 14 Dec 2026 as of our check on 9 Nov 2026.

Control of the hostname was checked; nothing about who operates it.

Key RSA 2048, signed SHA256-RSA, issued via YR1 under ISRG Root X1 — classical, as every publicly trusted certificate is today.

Names on this certificate (1)

nicolassitter.com.
Connection: TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 9 Nov 2026. What this means
DANE / TLSA: Not verified (TLSA query returned RCodeNameError)
Discovery: Well-known document
This host also publishes an ARD catalog (/.well-known/ai-catalog.json) declaring 4 resources. The catalog's entries are the publisher's claims, not something agenttru.st verified.
AI use policy: Search: yesAI input: yesAI training: yes

What this site's robots.txt says about how AI may use its content. Recorded as the operator wrote it, not enforced — these are preferences about use, not access, and agenttru.st only reads the agent's own discovery documents.
AI-facing documents: Publishes /llms.txt — “nicolassitter.com” a curated map of the site's content for language models

Fetched from this host during verification. Neither document is how this agent was discovered.
First seen: 1 Nov 2026

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Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: 🇺🇸 US · Amazon.com, Inc. (AS16509)
Last checked: 6d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of nicolassitter.com controls every word below.

Research articles

Find published studies on a topic, with links.

researchai searchaeogeochatgpthotels

Examples it gives

What have you published about ChatGPT and hotel citations?

AI hotel visibility

The hotels an AI platform recommends most in a destination, in the latest monthly edition.

hotelslandscapevisibilitydestination

Examples it gives

Which hotels does ChatGPT recommend in Paris?

Chains and cited sources

Which hotel chains an AI platform mentions most, what it cites, and the chain vs independent split.

brandschainscitationssourcesindependent

Examples it gives

Which hotel chains does Perplexity mention most?
What sources does Gemini cite for hotels?

What its catalog declares

From the ARD catalog this host publishes at /.well-known/ai-catalog.json. The operator controls every entry; agenttru.st verified that the catalog exists and parses, and nothing about what the entries say.

nicolassitter.com MCP server

mcp-server-card

Research on how AI answer engines (ChatGPT, Perplexity, Gemini, Google AI Mode, Claude) recommend and cite hotels, plus open race-results data. Public, read-only, no authentication.

https://nicolassitter.com/.well-known/mcp/server-card.json

nicolassitter.com public API (OpenAPI)

vnd.oai.openapi

Weekly AI hotel visibility data and research articles over plain HTTP GET.

https://nicolassitter.com/api/openapi.json

nicolassitter.com A2A agent (PACT Identity)

a2a-agent-card

A2A 1.0 HTTP+JSON agent answering from the same public research and AI hotel data. Callers authenticate with a PACT personal-agent JWT; any issuer that publishes a JWKS is accepted.

https://nicolassitter.com/.well-known/agent-card.json

AI hotel visibility data skill

agent-skills+md

Query nicolassitter.com for how AI answer engines recommend and cite hotels: weekly top hotels, chain brands and citation sources per platform and destination, plus the research articles behind them.

https://nicolassitter.com/.well-known/agent-skills/nicolassitter-ai-hotel-data/SKILL.md

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: Nicolas Sitter — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 1.0.0
Auth schemes: platformJwt
Card completeness: complete all eight fields required by a2a.proto v1.0

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Capabilities: extendedAgentCard pushNotifications streaming
Agent card: https://nicolassitter.com/.well-known/agent-card.json

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