Graphs that say how far to trust them.
HopperGraphs is the family of graphs Hopper Labs builds — tax law, tax forms, churches, schools, jobs and skills. Every record keeps where it came from, and every graph says whether a person has checked it.
See where each graph standsA record from LawGraph, as it is held
For purposes of providing for the payment of sick and accident benefits to members of such an association and their dependents, the term “dependent” shall include any individual who is a child (as defined in section 152(f)(1)) of a member who as of the end of the calendar year has not attained age 27.
The graphs
Nothing here is a public service yet. Six graphs are candidates on our own computers, and eight more are planned.
LawGraph
US federal tax law — 26 USC and 26 CFR — with every dated version of a provision, what amended it and when, what it cites, and the terms it defines.
- in-force provisions
- 9,448
- dated versions
- 37,977
- dated amendment events
- 26,002
- citation edges
- 54,864
- defined terms
- ~30,000
As the graph's own repository states them.
Candidate Run on our own computers. Its defined terms are machine-extracted: checked word for word against the source, not yet read by a person. It gives no legal advice.
Forms graph
Every federal AcroForm tax form we hold for tax years 2024 and 2025: each form, edition, schedule, line and box, its field inventory, and its links to the law it rests on.
Candidate Local only. Not published and not admitted. It claims no computed values and no legal currency.
FaithGraph
faithgraph.ioA directory of churches that says, for each one, when it meets, how to get there, and where each fact came from and when it was last checked.
Candidate Local only. A service time counts only once it is reviewed against its source, and none are yet. The church records are not public: whether they may be published is still undecided.
EducationGraph
US public schools, school districts and colleges from the federal CCD 2024–25 and IPEDS HD2024 datasets.
- public schools
- 100,237
- local education agencies
- 19,400
- postsecondary institutions
- 5,994
Loaded locally from the federal datasets named above.
Candidate Validated and loaded on our own computers; not a deployed service. The federal datasets do not claim to be complete for private or religious schools.
JobsGraph
jobsgraph.ioJob postings, careers feeds and employers over time, each with where it came from.
Candidate Runs only as a local instance and is not admitted. What it holds is reviewed historical evidence, not a live feed of open jobs.
SkillsGraph
How work gets done: it finds the procedure for a task, puts its prerequisites in order, and says what evidence is still missing for a particular business.
Candidate Validated locally. Its vocabulary is human-reviewed; the product is not published. Its first real procedures are a CFO's.
In the plan
TaxGraph, and shared graphs of APIs, datasets, documentation, GitHub, businesses, research and finance.
Planned Named in the HopperGraphs plan, with nothing built to show yet.
The words
What each word means when a graph here uses it.
- Live
- A public service anyone can use.
- None yet.
- Candidate
- Built and checked on our own computers. Not admitted, not published.
- Every graph above.
- Machine-extracted
- Found by software and checked word for word against its source, but not yet read by a person.
- LawGraph's defined terms.
- Human-reviewed
- A person has read it and said it is right.
- SkillsGraph's vocabulary.
- Planned
- Named in the plan, with nothing built to show.
- TaxGraph and seven shared graphs.