AsOf

A temporal fact ledger

What's true,
as of when.

AsOf is the structured record of what changed in the world: every fact dated, sourced and never overwritten. Built for AI retrieval. Readable by humans.

Query the recordRead the BriefAdd to Claude or ChatGPT

One claim. Nothing overwritten.

clm_GOOG_CEO_PICHAI · Google (Q95) · ceo

Sundar Pichai

valid 2015-08-10 to presentconf 0.984 sources

supersedes

Larry Page

valid 2011-04-04 to 2015-08-10

Latest changes on the record

All changes, by day →
2026-11-01unverified
Samsung Electronics · available_in · 63 countries
clm_5619DEE05EA2 · new claim · 1 source (1 primary) · conf 0.70
2026-11-01unverified
Amazon · discontinued · Holiday Beauty Event
clm_F593B8AC1B73 · new claim · 1 source (1 primary) · conf 0.70
2026-11-30unverified
Fireworks AI · price · Free SFT training
clm_EBDF56B50A5B · new claim · 1 source (1 primary) · conf 0.70
2026-10-27unverified
Vercel · price · 67% lower session cost
clm_B11021DF2839 · new claim · 1 source (1 primary) · conf 0.70
2026-10-27unverified
Vercel · feature_added · Deploy from plain Dockerfile
clm_14A916D58ED1 · new claim · 1 source (1 primary) · conf 0.70
2026-10-27unverified
Google Cloud Platform · partnership · Oracle
clm_5F7AC445CF93 · new claim · 2 sources (2 primary) · conf 0.70
2026-10-27unverified
Supabase · feature_added · Compute private alpha
clm_3A6ABDC267D8 · new claim · 1 source (1 primary) · conf 0.70
2026-10-27unverified
Salesforce · feature_added · Agent Evals
clm_B88AE15CA384 · new claim · 1 source (1 primary) · conf 0.70

01 · Web

Every page has a markdown twin

Entity, claim, timeline, day and Brief pages. JSON-LD on each, llms.txt and llms-full.txt at the root, stable IDs that never change.

/record/google.md →

02 · API and MCP

Two parameters that matter

as_of returns the state of an entity on a date. since returns every claim that changed after one. Same query layer behind REST and the MCP server.

Add the MCP server →

03 · Open data

Snapshots with a DOI

Periodic dumps of the full ledger on Hugging Face. Free to download, built to be cited.

Latest snapshot →
GET /v1/entities/google?as_of=2016-01-01

{
  "entity": "google",
  "as_of": "2016-01-01",
  "claims": [
    { "predicate": "ceo", "value": "Sundar Pichai",
      "valid_from": "2015-08-10", "valid_to": null,
      "confidence": 0.98, "sources": 2 }
  ]
}

The Brief · weekdays

Three things that changed yesterday in search and AI, and what to do about them.

Opinion lives here and only here. Every item links to its claim on the record. Published on the site, no signup.

Read the Brief