# eCFR Search Service API

**Canonical:** https://apis.io/apis/ecfr/ecfr-search-service-api/  
**Provider:** eCFR — https://apis.io/providers/ecfr/  
**Base URL:** https://www.ecfr.gov/api/versioner/v1  
**Documentation:** https://www.ecfr.gov/developers/documentation/api/v1

eCFR Search Service API is one of 3 APIs that [eCFR](https://apis.io/providers/ecfr/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Search Service. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

Historical search of the eCFR

## Machine-readable artifacts (2)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/ecfr/refs/heads/main/openapi/ecfr-search-service-api-openapi.yml
- **Documentation** — https://www.ecfr.gov/developers/documentation/api/v1

## Other eCFR APIs (2)

- [eCFR Admin Service API](https://apis.io/apis/ecfr/ecfr-admin-service-api/)
- [eCFR Versioner Service API](https://apis.io/apis/ecfr/ecfr-versioner-service-api/)

## Tags

Search Service

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/ecfr/ecfr-search-service-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/ecfr/.