Google's proposed WebMCP standard, unveiled at I/O 2026 as a way for websites to expose structured tools to browser-based AI agents, is already being put to work by travel giant MakeMyTrip, signaling early enterprise interest in an emerging "agentic web."
I/O 2026 · Google · The Agentic Web
WebMCP: Turning Websites Into Tools AI Agents Can Actually Use
Google's proposed open web standard lets sites declare JavaScript functions and HTML forms as callable tools — so browser-based agents like Gemini stop guessing from screenshots. Travel giant MakeMyTrip is already an early adopter.
2
API paths: imperative (JS tools) & declarative (HTML form annotations)
146
Chromium version with active origin trial & early preview support
1st
A first look — developer preview, limited production evidence
Two ways an agent reads a page
OLD: DOM / screenshot guessing
parse DOM
reason on pixels
infer fields
click & hope
hallucinate input
brittle · many steps
→
WebMCP: declared tools
discover tool
call w/ JSON Schema
reliable · fewer steps
Fewer stacked steps = less fragility. JSON Schema inputs cut hallucinated form entries; execution runs visibly in the browser tab with user-confirmation dialogs.
The recursive fit: complex booking flows
Multi-city itinerary
→
Multi-passenger forms
→
Structured tools
→
Accurate booking
MakeMyTrip's VP of Engineering showcased WebMCP layered onto existing pages as a progressive enhancement — preserving brand and UX while making the site legible to agents.
Why developers welcome it
Sidesteps fragile DOM scraping
JSON Schema reduces hallucinated inputs
Tool Inspector validates calls interactively
Sample demos: flight search, pizza maker, French bistro
Still a first look
No headless operation — needs a tab / web view
Complex interfaces may require refactoring
Discovery requires visiting the site
Prompt-injection & permission boundaries matter
The road ahead
Standardization runs through the WebMachineLearning group, with Google's early collaboration with Microsoft hinting at broader industry ambitions. Travel and e-commerce — dominated by intricate forms and support flows — will be the proving grounds for whether the agentic web moves from demo to dependable infrastructure.
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