# Skylark Precise Positioning Service

**Canonical:** https://apis.io/apis/swift-navigation/skylark-precise-positioning-service/  
**Provider:** Swift Navigation — https://apis.io/providers/swift-navigation/  
**Base URL:** http://na.all-freq.skylark.swiftnav.com:2101  
**Documentation:** https://www.swiftnav.com/products/skylark

Skylark Precise Positioning Service is one of 4 APIs that [Swift Navigation](https://apis.io/providers/swift-navigation/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include GNSS, Corrections, NTRIP, RTCM, and Streaming. The published artifact set on APIs.io includes API documentation, a getting-started guide, authentication docs, and rate-limit docs.

Real-time GNSS corrections delivered as continuously-open NTRIP streams. A client opens an HTTP GET against a regional caster mountpoint with HTTP Basic credentials issued per device, and the caster writes RTCM 3.x correction frames until the connection closes, while the client pushes its own approximate position back as NMEA GGA. Each caster serves a keyless NTRIP sourcetable at "/" that enumerates every stream, its RTCM message numbers and its constellation set.

## Machine-readable artifacts (9)

- **Documentation** — https://support.swiftnav.com/support/solutions/articles/44002519397-ntrip-client-configuration-for-skylark-corrections
- **GettingStarted** — https://www.swiftnav.com/skylark-quick-start-guide
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/swift-navigation/refs/heads/main/authentication/swift-navigation-authentication.yml
- **StreamCatalog** — https://raw.githubusercontent.com/api-evangelist/swift-navigation/refs/heads/main/asyncapi/swift-navigation-skylark-ntrip-streams.yml
- **Examples** — https://raw.githubusercontent.com/api-evangelist/swift-navigation/refs/heads/main/examples/swift-navigation-examples.yml
- **Plans** — https://raw.githubusercontent.com/api-evangelist/swift-navigation/refs/heads/main/plans/swift-navigation-plans-pricing.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/swift-navigation/refs/heads/main/rate-limits/swift-navigation-rate-limits.yml
- **SignUp** — https://account.swiftnav.com/sign-up
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/swift-navigation/refs/heads/main/apis.yml

## Other Swift Navigation APIs (3)

- [Swift Binary Protocol (SBP)](https://apis.io/apis/swift-navigation/swift-binary-protocol-sbp/)
- [Sora API](https://apis.io/apis/swift-navigation/sora-api/)
- [Swift Navigation Web Data Endpoints](https://apis.io/apis/swift-navigation/swift-navigation-web-data-endpoints/)

## Tags

GNSS, Corrections, NTRIP, RTCM, Streaming

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