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Full detail: Where this data comes from
Replica is a San Francisco-based data platform for the built environment, spun out of Alphabet's Sidewalk Labs in 2019, that operates a nationwide activity-based travel model. Its engine combines public data (US Census/ACS, GTFS, OpenStreetMap, land-use records, state traffic counts) with licensed private data (de-identified aggregate mobile location, credit transaction and driving-behavior data) to synthesize a privacy-preserving simulated population and a complete trip table for the United States.
- Website: https://www.replicahq.com/
- Documentation: https://documentation.replicahq.com/
- Help center: https://help.replicahq.com/en/
- Platform (login): https://studio.replicahq.com/
- GitHub: https://github.com/replicahq
Replica publishes no public developer API. Contract discovery probed replicahq.com,
documentation.replicahq.com, studio.replicahq.com and api.studio.replicahq.com for OpenAPI,
Swagger, GraphQL, MCP tools/list, A2A agent cards and every /.well-known/* discovery document —
all missed. The documentation site is ReadMe.io-hosted but its API-reference section is not enabled.
The Studio application is backed by a private api.studio.replicahq.com/api/v1/* service that
answers 401 Unauthorized behind an Express session cookie; it is undocumented and is not offered
as a developer API. Beware the marketing site's SPA catch-all, which answers HTTP 200 with an HTML
shell for /openapi.json, /llms.txt and every /.well-known/* path.
What Replica does publish machine-readably is its dataset schemas — field name, content type, sample value and description for each data product. Those are captured here.
| Path | What |
|---|---|
vocabulary/replica-data-dictionary.yml |
Data dictionary: 19 datasets, 338 documented fields, harvested from the documentation schema tables |
json-schema/ |
One JSON Schema (2020-12) per dataset, derived from the data dictionary, plus _index.yml |
data-model/replica-data-model.yml |
Entity-relationship graph (person / household / trip / network_link / transit_route / geography / intersection) derived from the documented join keys |
llms/replica-llms.txt |
Verbatim llms.txt from documentation.replicahq.com |
changelog/replica-changelog.yml |
Structured recent release notes (seasonal data, annual traffic, platform, product launches) |
lifecycle/replica-lifecycle.yml |
Data-vintage versioning cadence, dated dataset discontinuations, absent SLA/status page |
conformance/replica-conformance.yml |
Reference-standard conformance (OSM, GTFS, FIPS, ACS/PUMS/CTPP/LEHD, NAICS, HPMS, NHTSA FARS, WGS 84, H3, WKT/GeoJSON, published privacy principles) plus the negative API-protocol rows |
packages/replica-packages.yml |
First-party open-source libraries (no API client SDK exists) |
well-known/replica-well-known.yml |
Full /.well-known/ probe record — zero documents found |
security/replica-domain-security.yml |
TLS/HSTS per host; DNSSEC, SPF and DMARC (p=reject) on replicahq.com |
Replica (replicahq.com) — this repo — is not Replica Cyber (replicacyber.com), Replicate (replicate.com), Replicated (replicated.com), Replicant or Replika. Public claims that "Replica achieved SOC 2 Type II" belong to Replica Cyber and are not attributed here.