Kyle Truong Joins X Everything API

Engineer Kyle Truong announced that he has joined the X team under SpaceXAI, working with Santiago and Chris Park to build the X Everything API, emphasizing learning and delivery.

The Everything API is internally described as a unified interface for developers and agents, covering real-time posts and events, historical retrieval, post and interaction management, interaction and audience data, as well as a rich layer that structures original content. Recruitment materials state that X's weekly active content is in the billions, and the interface aims to enable external products and agent workflows to read and write on the platform. The team is based in Palo Alto.

Chris Park is responsible for the developer platform, recently pushing for a globally available, usage-based MCP service aimed at agents, along with Python and TypeScript toolkits and interface playgrounds. Santiago publicly stated that he is building the Everything API to enable agents to work both inside and outside X, and has launched the advertising side MCP, with developer applications needing to be linked to advertising projects for use. Another engineer reported that they have also been working on the Everything API, enhancing products and agent processes with X.

xAI was established in 2023 and was acquired by SpaceX in early 2026, integrating into a vertical stack: ground gigawatt-level training clusters, Grok models, consumer and enterprise AI products, and X as a real-time information stream. Roadshow materials state that X has approximately 350 million posts daily, with Grok and X combined having about 550 million monthly active users. The interface is positioned to sell this real-time stream to external developers and agents, rather than just serving the internal Grok.

The X interface has undergone significant price increases and permission reductions since Musk's acquisition, causing a temporary break in third-party clients and research pipelines. The usage-based billing and MCP change the interface from "social read-write" to "agent callable tool layer." The name Everything corresponds to the company's goal of making X a comprehensive application: content, advertising, business, and agents all through the same interface.

From a market mechanism perspective, this is an expansion of platform supply, not a stock price event. Buyers are developers, advertisers, and agent frameworks seeking real-time opinion and posting capabilities; sellers are X, charging for data and writing permissions based on calls. Funds flow from interface billing to the platform, and talent flows from the external engineering market to SpaceXAI. The beneficiaries are teams that can integrate agents into advertising and content streams, while those still relying on the old free high-usage interfaces for crawlers and research projects are under pressure. The hiring of a single individual does not change the interface pricing but indicates that this direction is progressing.

Source: Public Information