API

The PAX Marketplace exposes two JSON endpoints for programmatic access. Agents and applications can query these to discover, evaluate, and install PAX without visiting the website.

GET /index.json

Full registry of all published PAX with enriched knowledge detail. Schema version 2.0.

Example

curl -s https://pax-market.com/index.json | jq '.[0]'

Each entry contains:

Field	Type	Description
`name`	string	Kebab-case PAX identifier
`pax_type`	string	`paper` \| `topic` \| `field` \| `engine`
`domain`	object	Domain metadata: `display_name`, `description`, `research_questions[]`, `temporal_scope`, `population`
`constructs_detail`	array	Full construct definitions with `id`, `display_name`, `definition`, `aliases[]`
`findings_detail`	array	Empirical findings with `finding_text`, `direction`, `effect_size`, `confidence`, `method_used`
`propositions_detail`	array	Theoretical claims: `proposition_text`, `construct_from`, `construct_to`, `direction`
`playbooks_detail`	array	Analysis recipes: `display_name`, `description`, `estimated_runtime`, `step_count`, `engines_used[]`
`sources_detail`	array	Bibliographic info: `title`, `authors`, `year`, `doi`
`related_packs`	array	Up to 3 related PAX names (computed from shared constructs)
`download_url`	string	Path to `.pax.tar.gz` archive
`download_sha256`	string	SHA-256 checksum of the archive

GET /packs/index.json

Same as above — available at the section level.

GET /graph.json

Full knowledge graph — all constructs as nodes and finding-implied edges. Powers the interactive visualization.

Field	Type	Description
`nodes[]`	array	Constructs: `id`, `name`, `domain`, `color`
`edges[]`	array	Finding-implied connections: `source`, `target`, `weight`
`domains[]`	array	Domain summary: `name`, `color`, `count`
`stats`	object	`nodes`, `edges`, `domains` counts

GET /packs/{name}.pax.tar.gz

Downloadable PAX archive. Contains pax.yaml, knowledge/, engines/, playbooks/, and data/. Verify integrity with the download_sha256 from the registry.

Install a PAX

# Download
curl -O https://pax-market.com/packs/happiness-economics.pax.tar.gz

# Import into Praxis
praxis_import_pax("happiness-economics.pax.tar.gz", install=True)

Agent Usage

AI agents can discover and install PAX programmatically:

# 1. Discover PAX that cover "income" constructs
registry = fetch("https://pax-market.com/index.json")
matches = [p for p in registry
           if any("income" in c["id"] for c in p["constructs_detail"])]

# 2. Check what a PAX provides before installing
pax = matches[0]
print(pax["domain"]["research_questions"])
print([f["finding_text"] for f in pax["findings_detail"]])

# 3. Download and install
praxis_import_pax(f"https://pax-market.com{pax['download_url']}", install=True)

# 4. Publish your own PAX back to the marketplace
praxis_create_pax("my-research", ...)
praxis_publish_pax("my-research")  # → live on pax-market.com