/vendor/marriott/AgentRouting.json or
/vendor/marriott/AgentContext.json directly.
marriott.com
Overview
Does marriott.com support MCP?
No confirmed MCP support was found for marriott.com as of 2026-06-24.
What agentic protocols does marriott.com support?
As of 2026-06-24, marriott.com has confirmed support for UCP and proprietary.
Is marriott.com's API publicly accessible or partner-gated?
Access varies by protocol: platform mediated, partner only.
Does marriott.com explicitly prohibit automated access?
Yes. marriott.com's terms of service explicitly prohibit automated or scraper access to the public website without prior written permission.
Is marriott.com agent-ready?
Partial. marriott.com supports some agentic workflows but requires a human handoff for certain operations — see the protocols and summary sections for details.
Protocols
No evidence found that Marriott has implemented or publicly committed to the A2A (Agent2Agent) protocol. Marriott is actively building internal agentic infrastructure — publicly described as an 'agentic mesh' — but all sources describe this as an internal orchestration layer, not an externally callable A2A-compliant interface. The Linux Foundation's April 2026 announcement naming 150+ A2A-supporting organizations cited Microsoft, AWS, Salesforce, SAP, and ServiceNow with vertical adoption in supply chain, financial services, insurance, and IT operations; Marriott is not named. No agent card at a well-known URL, no A2A SDK reference, and no developer portal documentation referencing A2A was located. Recorded as not_found rather than confirmed_absent because no Marriott-specific statement explicitly declining or deprecating A2A was found — only absence of any supporting evidence.
No evidence that Marriott has implemented or been named as a partner for the Agentic Commerce Protocol (OpenAI/Stripe). Known named ACP merchant partners in travel/hospitality include Delta Air Lines, Expedia, and Hilton (the latter via the Amex ACE framework); Marriott is not among them. Marriott's confirmed OpenAI engagement is participation in the ChatGPT advertising (Ad Pilot) program, which is a discovery/advertising arrangement, not an ACP checkout integration. Marriott's other agentic booking work is with Google AI Mode, which is UCP-adjacent, not ACP. Recorded as not_found rather than confirmed_absent because no Marriott-specific statement ruling out ACP was located.
No evidence found that Marriott (marriott.com) is among the 60+ named AP2 launch or contributing partners. Named partners include Mastercard, PayPal, American Express, Adyen, Coinbase, Etsy, Lowe's, Forter, Intuit, JCB, Mysten Labs, Revolut, Salesforce, ServiceNow, UnionPay International, and Worldpay — Marriott is not among them. No Marriott-specific AP2 adoption announcement, developer documentation, or implementation was found. This is recorded as not_found rather than confirmed_absent because no Marriott-specific statement rejecting or deprecating AP2 was located.
No official Marriott-published MCP server was found in the official MCP registry, Marriott's developer portal (devportalprod.marriott.com), or any Marriott press release or documentation. A third-party scraping-based MCP server exists at https://github.com/markswendsen-code/mcp-marriott (published by Strider Labs, same author as parallel scraper-MCPs for Hilton, Booking.com, Walmart, etc.), which uses browser automation with user-supplied Marriott credentials — this is unsanctioned, not an official vendor integration, and is excluded as a routing option per research policy. Marriott has publicly described an internal 'agentic mesh' architecture (per CIO Dive, Sept 2025), but no external MCP surface has been announced; this is recorded as not_found rather than confirmed_absent because no Marriott-specific statement explicitly deprecating or declining MCP was located.
MPP (Machine Payments Protocol) launched March 18, 2026, co-authored by Stripe and Tempo. Named launch partners and directory entries include Anthropic, OpenAI, Shopify, Alchemy, Dune Analytics, DoorDash, Mastercard, Nubank, Ramp, Revolut, Standard Chartered, Visa, Browserbase, MultiversX, Cloudflare, and Lightspark; Marriott is not among them. No vendor-specific statement, developer portal entry, or integration announcement connecting marriott.com to MPP was found. Recorded as not_found rather than confirmed_absent because the absence is based on omission from public partner lists — no Marriott-specific rejection or non-participation statement was located.
No evidence found that marriott.com has deployed an NLWeb /ask or /mcp endpoint. Named NLWeb launch partners and pioneers include TripAdvisor, Shopify, Eventbrite, O'Reilly Media, Hearst, Chicago Public Media, Common Sense Media, DDM (Allrecipes/Serious Eats), Milvus, Snowflake, Qdrant, and Inception Labs — Marriott is not among them. An unofficial third-party browser-automation MCP package (github.com/markswendsen-code/mcp-marriott by Strider Labs) exists but is not an NLWeb implementation and is not sanctioned by Marriott. Marriott's own public AI strategy references internal 'agentic mesh' architecture and Microsoft 365 Copilot tooling, with no mention of NLWeb adoption. Recorded as not_found rather than confirmed_absent because no Marriott-specific statement or deprecation notice addresses NLWeb directly.
Hotel room availability search and direct booking completion via Google AI Mode and Gemini — an agent can discover Marriott properties, check pricing and availability in real time, and complete a reservation without redirecting the user to marriott.com. Marriott acts as merchant of record; Google surfaces handle the agent interaction layer.
Marriott International is explicitly named by Google as a participating partner in UCP for Lodging, confirmed in multiple Google announcements (Google I/O / Google Marketing Live, May 19–20, 2026) and corroborated by Marriott CEO Anthony Capuano's public confirmation (Q4 2025 earnings call, Feb 2026) that Marriott began designing the integration in November 2025. The UCP for Lodging program is in a waitlist/pre-launch phase as of the check date: Google's own developer page (https://developers.google.com/hotels/ucp) states 'Detailed onboarding and specs coming soon' and directs new participants to a waitlist, meaning the integration is not yet publicly callable. Access is platform-mediated and requires Google approval; Marriott is not among the ~26 sites with live public UCP implementations found in independent scans of the open web, consistent with the spec being unpublished.
...
No evidence that marriott.com has directly implemented x402. The x402 Foundation (launched April 2026 under the Linux Foundation) lists founding and participating members as Coinbase, Cloudflare, Stripe, Google, Visa, Mastercard, AWS, and Shopify — Marriott is not among them. Separately, Travala's x402-based AI hotel booking protocol (on Base, via USDC) includes Marriott properties in its 2.2M-property inventory sourced through aggregator partners, but this reflects Travala's integration, not a direct Marriott implementation. No Marriott-issued statement, developer documentation, or API announcement referencing x402 was located; recorded as not_found rather than confirmed_absent because the absence is from search results, not from a Marriott-specific deprecation or opt-out notice.
No evidence found of Marriott having built or launched a ChatGPT app using the OpenAI Apps SDK. Marriott's confirmed OpenAI relationship as of mid-2026 is participation in the ChatGPT Ad Pilot program (sponsored advertising placements within ChatGPT responses), which is a paid advertising channel, not an Apps SDK integration. Competitors with confirmed native ChatGPT apps include Booking.com, Expedia, Accor, Wyndham, and IHG; Marriott is not among them — industry coverage explicitly notes Marriott has not announced a native ChatGPT app. A third-party community-built GPT ('Marriott Design Expert' at chatgpt.com/g/g-fY2PGJeuR-marriott-design-expert) exists but is not an official Marriott integration and does not constitute use of the Apps SDK.
Property search, rate/availability lookup, and booking management across Marriott's portfolio of 30+ hotel brands via integration with Marriott's Central Reservation System (CRS). An agent can query hotel inventory, check room availability for specified dates, retrieve rates, and manage reservations programmatically.
Marriott operates a developer portal at devportalprod.marriott.com exposing a CRS API catalog for property search, availability, and booking management. The portal is authentication-gated behind cpp.marriott.com (a Salesforce-based portal), with a 'provision-partner' path visible in login URLs, indicating access requires a partner provisioning relationship rather than self-serve signup. Documentation content is not publicly visible without login, so endpoint-level auth details and full API scope could not be verified; access tier is partner_only based on observed provisioning flow. The Spotnana integration announcement independently confirms Marriott exposes a CRS API used by external partners. Marked insufficient_data for sketchiness because full docs are gated and could not be directly inspected.
Retrieval of hotel property digital media assets (photography, brand images, style assets) for Marriott-branded properties. An agent can query a list of properties, list available assets per property filtered by type/status, and retrieve asset metadata and download URLs. Capability is content/media only — no booking or reservation functionality.
'The Stacks' (formerly Marriott Asset Library) is a separate proprietary REST API at thestacks.marriott.com distinct from the CRS developer portal. Its documentation at https://thestacks.marriott.com/api/readme.html is publicly visible and describes endpoints for listing properties, listing/filtering assets, and paginating results. Access requires extranet credentials (login page describes it as a 'Marriott Extranet'). Target users are hotel franchisees, their creative agencies, and OTA distribution partners (Expedia, Orbitz, Hotels.com) that integrate property imagery. This is confirmed as a long-running Marriott-internal tool rebuilt under the 'The Stacks' brand by agency Imarc.
Searched for llms.txt, AGENTS.md, /.well-known/agent, /.well-known/ai-plugin.json, /.well-known/ai-catalog.json, and /.well-known/ucp on both www.marriott.com and devportalprod.marriott.com. No web-indexed references to any such file being published on any Marriott domain were found. Direct HTTP fetches via curl were network-blocked in the research environment (all returned HTTP 000), so on-domain presence could not be independently confirmed via fetch; however, the working web search found no third-party references, crawl results, or mentions indicating these files exist. Marriott has active AI/agentic initiatives (Ask Bonvoy, agentic cloud transformation announced 2025–2026) but no evidence of external-facing self-declaration discovery files accompanying them. Recorded as not_found rather than confirmed_absent because no vendor-specific denial or deprecation notice was located — only absence of evidence.
Summary
Has agent interface: partial
Target Marriott's UCP for Lodging integration via Google AI Mode/Gemini for agent-mediated hotel search and booking — this is the only confirmed externally-callable interface, currently in pre-launch/waitlist phase; monitor https://developers.google.com/hotels/ucp for published specs and onboarding. For programmatic CRS access (availability, rates, reservations across 30+ brands), apply for partner provisioning via devportalprod.marriott.com through the cpp.marriott.com Salesforce portal — access is gated and requires a partner relationship. Do not attempt scraping; Marriott's own Terms of Use explicitly prohibit automated access without written permission.
AgentContext
Verified discrepancies
Vendor claim: Marriott.com advertises nightly room rates that represent the cost of a stay, including on loyalty award-night bookings where the app may display 'Taxes & fees included.'
What actually happens: Mandatory resort/destination fees are routinely added after the initial rate display — sometimes disclosed only at the final confirmation screen or at physical check-in — making the actual checkout total materially higher than the advertised price. A separate documented issue exists with points/award-night bookings, where resort fees are still charged even though the platform implies they are included.
Agent guidance: Do not treat the first price displayed on marriott.com as the final checkout total. Before confirming any booking — paid or award-night — explicitly query the property's resort/destination fee by checking the full rate breakdown on the rate-detail or 'taxes and fees' page, and add that mandatory fee to the total cost presented to the user. For Marriott Bonvoy points bookings, do not rely on any 'fees included' label; call the property or check its dedicated fee disclosure page to confirm whether a resort fee will be collected at check-in.
- The Texas Attorney General secured a settlement with Marriott requiring it to clearly and conspicuously disclose all resort fees and the total price of rooms at the point of advertising, after finding violations of the Texas Deceptive Trade Practices Act.
- The DC Attorney General sued Marriott alleging that quoting lower advertised prices than the true total — by omitting mandatory resort fees — caused consumers to pay hundreds of millions of dollars more than expected, and the court refused to dismiss the case.
- A documented gap exists specifically for Marriott Bonvoy award-night bookings: the Marriott app can display 'Taxes & fees included' yet resort fees are still charged at check-in, meaning the no-cost representation is false even after state-level settlements applied to paid bookings.
Vendor claim: Marriott.com displays room rates and availability on its search results and property landing pages, implying those rooms are bookable at the shown price. Marriott Bonvoy program terms require that standard rooms at eligible properties (e.g., all Luxury Collection hotels, as former Starwood brands) be made available for points redemption.
What actually happens: Two independently documented patterns undermine displayed availability: (1) Rates shown on Marriott.com search/landing pages have been reported to change materially — in one documented November 2024 case, a price jumped significantly between the search results page and the checkout screen, a classic bait-and-switch pattern. (2) Individual properties have been documented blocking points-bookable standard rooms by relabeling them with non-standard category names to suppress award inventory, even when those exact room types are simultaneously available for cash. Phantom booking complaints linked to Marriott's legacy reservation systems have also surged as of early 2025.
Agent guidance: Do not treat the price displayed on a Marriott.com search results or property landing page as the confirmed booking price. An agent should always verify the final price shown on the checkout confirmation screen before submitting a reservation. For points redemptions, if a standard room type appears unavailable for awards but is shown available for cash, escalate to a human rather than concluding no award inventory exists — the property may be improperly suppressing it.
- A November 2024 FlyerTalk thread documents a user attempting to book the Prince Gallery Hotel on marriott.com, where the landing page showed one price for 9 nights but the rate changed materially upon proceeding to book — prompting the user to label it a bait-and-switch.
- One Mile at a Time documents Las Alcobas Napa Valley (a Marriott Luxury Collection property) appearing to rename standard king rooms to suppress points availability, while those same rooms remained available for cash — blocking award redemptions that Marriott's own program rules require to be open.
- A March 2025 report describes Marriott's outdated reservation software as a documented source of phantom bookings and inventory discrepancies, with complaint volumes surging and consumer confidence declining.
Vendor claim: Marriott.com presents itself as the unified booking platform and customer service counterparty for stays at Marriott-branded properties, giving consumers the reasonable expectation that Marriott International is their merchant of record and the entity responsible for resolving billing disputes and refunds.
What actually happens: When consumers book through marriott.com and a dispute or refund request arises at a franchised property, Marriott International's standard response is that the property is operated by an independent franchise management company unaffiliated with Marriott, and that the matter has been referred to the franchisee for handling. Marriott declines to provide details or directly resolve the complaint, leaving consumers without a clear merchant of record to pursue. This deflection occurs even though the booking was made on marriott.com and payment is collected centrally.
Agent guidance: When completing a booking at a Marriott-branded property via marriott.com, an agent should verify at checkout whether the specific property is corporate-owned or franchised. If the property is franchised, note this in the transaction record and advise the user that dispute and refund resolution may need to be pursued directly with the franchisee rather than with Marriott International, and that Marriott corporate may decline to intervene. If a cancellation or refund is the goal, contact the property directly before relying on marriott.com customer service to act as the merchant of record.
Vendor claim: Marriott.com presents points-redemption (award night) bookings showing only the points cost, implying no additional cash charges are required to complete the reservation.
What actually happens: When a customer proceeds through the booking flow for an award night, mandatory destination fees (and taxes on those fees) appear only at the final checkout step — not on the initial rate display or in the 'rate details' panel. This means the full cash cost required to complete a points booking is not disclosed until late in the transaction, a practice that has been cited as non-compliant with both Marriott's own prior lawsuit settlement agreement and FTC regulations on drip pricing that took effect in 2024. The issue was documented as still active as of May 2025.
Agent guidance: When completing a points-redemption (award night) booking on marriott.com, do not treat the points-only price shown on search results or rate detail panels as the total cost. Proceed through to the final checkout screen and explicitly expand the fees breakdown before confirming any reservation; capture the full cash amount due (destination fees + taxes) and surface this to the user for approval before completing the transaction.
Human handoff required for
Escalate to a human when the final checkout total on marriott.com exceeds the initially displayed rate due to mandatory resort or destination fees appearing only at the confirmation screen, so the user can approve the true total before the reservation is submitted.
- Texas AG reached a settlement requiring Marriott to disclose resort fees transparently; a DC AG lawsuit and 50-state AG investigation document ongoing failures to disclose fees upfront.
- An FTC drip-pricing rule that took effect in 2024 is cited in a May 2025 report as being violated by Marriott's practice of disclosing mandatory destination fees only at the final checkout step.
Escalate to a human when booking a Marriott Bonvoy award night and the platform displays a 'taxes and fees included' label or shows only a points cost, because mandatory cash destination fees and associated taxes may still be charged at check-in despite that labeling.
- A May 2025 report documents that Marriott's booking platform fails to disclose mandatory cash destination fees on award-night bookings until the final checkout step, with earlier screens showing only the points cost, in ongoing non-compliance with FTC drip-pricing regulations.
- The 50-state AG investigation and prior settlement documentation confirm resort fees are charged on award nights even when platform labeling implies they are included.
Escalate to a human when the price shown on a marriott.com search results or property landing page changes materially by the time the checkout confirmation screen is reached, rather than proceeding to complete the booking at the new price without user reconfirmation.
- A November 2024 FlyerTalk report documents a case where a Marriott.com rate changed significantly between the search results page and the checkout screen, a bait-and-switch pattern.
- A March 2025 report links Marriott's legacy reservation systems to a surge in phantom booking complaints, further undermining the reliability of displayed availability and pricing.
Escalate to a human when a Marriott Bonvoy points redemption shows no standard award room availability at a property while the same room type is simultaneously listed as available for cash purchase, rather than concluding no award inventory exists.
Escalate to a human when a refund or billing dispute arises on a booking made through marriott.com at a franchised property, because Marriott International has a documented pattern of declining to act as merchant of record and redirecting consumers to the unnamed franchisee operator.
Five discrepancy categories were checked for marriott.com: (1) Pricing — findings present; substantial independent evidence found including a Texas AG settlement, an active DC AG lawsuit, and a 50-state AG investigation documenting resort and destination fee non-disclosure, plus active FTC drip-pricing non-compliance on award-night bookings as of May 2025. (2) Availability — findings present; documented evidence of rate changes between search and checkout pages (November 2024 FlyerTalk), improper suppression of award inventory at Luxury Collection properties, and a surge in phantom booking complaints tied to legacy systems in March 2025. (3) Identity — findings present; a consistent BBB-documented pattern of Marriott International deflecting refund and billing disputes to franchise operators despite bookings being transacted through marriott.com. (4) Policy — no finding; consumer-level cancellation and refund complaints were found but no primary-source regulatory action, court ruling, or official watchdog finding specifically documenting systemic enforcement of cancellation policy contrary to stated terms was located; this category returned a null result. (5) Undisclosed constraints — findings present; a May 2025 report directly documents non-disclosure of mandatory cash fees on award-night bookings until the final checkout step, inconsistent with FTC drip-pricing regulations. No scans were blocked; all five categories were actively searched.