Library · 2025
Astral API
The Astral API indexes location attestations from the Ethereum Attestation Service across chains and serves them through OGC-compliant REST and GraphQL interfaces backed by PostGIS.
Purpose
Attestations scattered across chains are invisible to geospatial tooling until something indexes them into a queryable spatial source.
Approach
A multi-chain indexer and gateway -- location attestations from the Ethereum Attestation Service, stored in PostGIS, served over OGC-compliant REST and GraphQL.
Status
Research preview; live hosted service, open source on GitHub.
Connections
Related Notes
Astral Compute
PreviewAstral Compute evaluates spatial predicates -- distance, containment, intersection -- inside a trusted execution environment and returns cryptographically signed results that a third party can verify.
Astral Docs: Location Proofs
ActiveThe Astral documentation describes location proofs as verifiable artifacts pairing a claim about the timing and position of an event with corroborating evidence, graded along a certainty spectrum rather than treated as absolute.
Astral Docs: Location Records
ActiveThe Astral documentation describes location records -- signed, verifiable location data artifacts that add cryptographic attribution and integrity checking to raw geospatial data.
Astral: a spatial extension for the decentralized web
ActiveThis FOSS4G North America 2025 talk introduces Astral: the Location Protocol for signed spatial records, a modular library of location-proof strategies, and Spatial.sol utilities for smart contracts.
Astral SDK
ActiveThe Astral SDK is a TypeScript library for creating and verifying location attestations -- signed records that bind location data to a signer and a time, off-chain or on-chain via the Ethereum Attestation Service.