Astronomy API v3
Version 3 of the Astronomy API, published by the provider as a reference draft with a complete OpenAPI 3.1 definition before it ships — "so that the design can be read and argued with". A breaking redesign of the v2 request and response shapes: JSON numbers instead of strings, one representation per value, a declared meta.units block, ISO 8601 instants with an explicit sampling step and timezone, cursor pagination on positions, RFC 9457 problem details, bearer authentication, and apsis events alongside eclipses. Five operations across positions, events, search and the two studio renderers. NOT YET IN PRODUCTION — /api/v2 remains the callable surface.
Astronomy API v3 is one of 6 APIs that Astronomy API publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Astronomy, Positions, Events, and Star Charts. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.
This API exposes 5 operations across 5 paths, organized into 3 resource areas, and defines 28 schemas. It is described by OpenAPI 3.1.0, at version 3.0.
Requests are made against a single base URL, https://api.astronomyapi.com/api/v3.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
Astronomy API v3 declares
1 security scheme
for authenticating requests.
It accepts HTTP bearer tokens (applicationKey).
By default, every request must be authenticated.
applicationKey— The application key, sent as Authorization: Bearer . Keys are never accepted in the query string, where they would be recorded in logs and browser history.
Paths & Operations 5
Across 5 paths, the API surfaces 5 operations — 3 GET, 2 POST. They span 3 resource areas: Bodies, Search, Studio. Each is listed below with its method, path, parameters, and response codes.
Where the Sun, the Moon and the planets are, and what they look like.
The catalogue of deep sky objects and stars.
Rendered images of the sky.
Schemas 28
The contract defines 28 schemas that model the data the API accepts and returns. The most detailed are Sample (11 properties), CatalogueObject (8 properties), EclipseEvent (8 properties), Contacts (6 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from Astronomy API 5
Other APIs Astronomy API publishes across the network.
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