Structured JSON for 9,435 reference sites and 266,554 entities, every entity with its sources, plus the Sacred Atlas compilation dataset. The catalogue is free. Data routes are paid per request in USDC on Base through the x402 protocol: no account, no API key.
Request any priced route. The server answers 402 with a PAYMENT-REQUIRED header that states the price, the network (eip155:8453) and the receiving address. An x402 client (for example @x402/fetch for Node, or any agent framework with x402 support) signs the USDC transfer and retries with PAYMENT-SIGNATURE; the response then carries the data. Species codexes (species-*) are free because their source data is CC BY-NC.
curl https://api.codexery.com/v1/sites # free catalogue curl -i https://api.codexery.com/v1/entity/lost-civilizations/lost-civilizations/cahokia # 402 + PAYMENT-REQUIRED
| Route | What you get | Price |
|---|---|---|
GET / | Service description (free) | free |
GET /v1/sites | Catalogue of every site with entity counts per category (free) | free |
GET /v1/site/{site} | Categories + entity name list for one site | $0.005 |
GET /v1/site/{site}/{category} | Full category data: every entity with sources | $0.005 |
GET /v1/entity/{site}/{category}/{id} | One entity | $0.002 |
GET /v1/search | Search entity names across the whole network (max 50 hits) | $0.01 |
GET /v1/sacredatlas | Sacred Atlas dataset catalogue (free) | free |
GET /v1/sacredatlas/data/{dataset} | A whole Sacred Atlas compilation dataset | $0.01 |
GET /v1/sacredatlas/record/{dataset}/{id} | One compilation record | $0.002 |
GET /v1/sacredatlas/text/{work}/{book} | One book of a public-domain scripture text | $0.005 |
GET /v1/sacredatlas/crossrefs/{book} | Verse-level cross-tradition links for one book | $0.005 |
GET /v1/sacredatlas/commentary/{source}/{file} | One chapter of public-domain commentary | $0.002 |
Machine-readable: /openapi.json · policy for AI agents: /llms.txt
Entry text is adapted from Wikipedia and other listed sources under CC BY-SA 4.0; credit "Codexery (codexery.com)" with a link when you publish or display it. The same entry data is published free on each site at https://codexery.com/<codex>/data/content/<category>.json; the API adds search, per-entity routes, the network-wide index and the licence-checked Sacred Atlas dataset (docs).