# Hexagraph

## Docs

- [Scholarly Authors API — Profiles and Citation Metrics](https://hexagraph-docs.voyla.in/api-reference/authors.md): Search author profiles and retrieve citation counts, publication totals, ORCID identifiers, and institutional affiliations via Hexagraph.
- [Autocomplete API — Fast Type-Ahead Entity Suggestions](https://hexagraph-docs.voyla.in/api-reference/autocomplete.md): Get type-ahead search suggestions for any Hexagraph entity — outputs, authors, sources, institutions, publishers, and funders — in one request.
- [Hexagraph API: HTTP Error Codes and How to Handle Them](https://hexagraph-docs.voyla.in/api-reference/errors.md): HTTP error codes returned by the Hexagraph API. Covers 400 Bad Request, 404 Not Found, 429 Too Many Requests, and 500 server errors with example responses.
- [Research Funders API — Grant Agencies and Foundations](https://hexagraph-docs.voyla.in/api-reference/funders.md): Search and retrieve research funding agencies with DOI identifiers, linking government bodies, foundations, and international research councils.
- [Hexagraph GraphQL API: Endpoint, Playground & Rate Limits](https://hexagraph-docs.voyla.in/api-reference/graphql/overview.md): Introduction to the Hexagraph GraphQL gateway. Access the interactive playground, send programmatic queries, and learn when to choose GraphQL over REST.
- [Hexagraph GraphQL Queries: output, outputs, and author](https://hexagraph-docs.voyla.in/api-reference/graphql/queries.md): Full reference for Hexagraph GraphQL queries: output(id), outputs(query), and author(id). Includes arguments, return fields, and complete query examples.
- [Research Institutions API — Universities, Labs, and Centers](https://hexagraph-docs.voyla.in/api-reference/institutions.md): Search universities, national labs, and research centers by name or country, and retrieve institution type and affiliated author data.
- [Scholarly Outputs API — Works, Articles, and Preprints](https://hexagraph-docs.voyla.in/api-reference/outputs.md): Query and retrieve scholarly works including journal articles, preprints, and books with citation metrics, author lists, and source data.
- [Hexagraph REST API Reference: Endpoints and Params](https://hexagraph-docs.voyla.in/api-reference/overview.md): Complete reference for the Hexagraph REST API. Base URL, request format, response structure, pagination, filtering, and query parameters for all endpoints.
- [Academic Publishers API — Organizations and Journals](https://hexagraph-docs.voyla.in/api-reference/publishers.md): Search and retrieve academic publishing organizations — commercial publishers, university presses, and society publishers — from Hexagraph.
- [Publication Sources API — Journals and Repositories](https://hexagraph-docs.voyla.in/api-reference/sources.md): Query journals, repositories, and conference venues by name, retrieve ISSN identifiers, venue type, and associated publication metadata.
- [Utility Endpoints — Health, ID Resolver, Rate Limits](https://hexagraph-docs.voyla.in/api-reference/utilities.md): Check service health, resolve any OA:ID to its entity type, and monitor per-second, per-minute, and per-day API rate-limit quota usage.
- [Hexagraph API Access: No Auth, Rate Limits Explained](https://hexagraph-docs.voyla.in/authentication.md): Hexagraph uses open access with enforced rate limits rather than API keys. Learn how access controls work and what to do when limits are reached.
- [Response Caching: How Hexagraph Speeds Up API Queries](https://hexagraph-docs.voyla.in/concepts/caching.md): Hexagraph caches responses to speed up repeated queries. Learn how caching affects your integration's performance and how to design around it.
- [Hexagraph Data Model: Scholarly Entities Explained](https://hexagraph-docs.voyla.in/concepts/data-model.md): Understand the six core entity types in Hexagraph — outputs, authors, sources, institutions, publishers, and funders — and how they interrelate.
- [Hexagraph OA:ID System: Format, Resolution, and Usage](https://hexagraph-docs.voyla.in/concepts/id-system.md): Hexagraph uses OA:ID prefixed identifiers for all scholarly entities. Learn how to construct, resolve, and use these IDs across REST and GraphQL endpoints.
- [Hexagraph API Rate Limits: Per-Minute and Daily Quotas](https://hexagraph-docs.voyla.in/concepts/rate-limits.md): Hexagraph enforces per-IP rate limits of 30 requests per minute and 1,000 per day. Learn how limits work and how to build resilient integrations.
- [Retrieve Author Profiles and Publication Metrics via API](https://hexagraph-docs.voyla.in/guides/author-profiles.md): Use the Hexagraph authors endpoint to fetch researcher profiles, citation counts, output totals, institutional affiliations, and ORCID identifiers.
- [Implement Type-Ahead Autocomplete Search with Hexagraph](https://hexagraph-docs.voyla.in/guides/autocomplete.md): Power type-ahead search in your app using Hexagraph's autocomplete endpoint, which surfaces works, authors, sources, institutions, publishers, and funders.
- [Query Scholarly Data with the Hexagraph GraphQL API](https://hexagraph-docs.voyla.in/guides/graphql-queries.md): Use Hexagraph's GraphQL endpoint to fetch multiple scholarly entities in a single query. Explore outputs, authors, and more with the interactive playground.
- [Search and Filter Scholarly Outputs via the REST API](https://hexagraph-docs.voyla.in/guides/search-outputs.md): Query Hexagraph's outputs endpoint to search scholarly works by keyword, filter by attributes like DOI presence, and paginate through large result sets.
- [Hexagraph — Scholarly Metadata API Gateway Overview](https://hexagraph-docs.voyla.in/introduction.md): Hexagraph is a high-performance academic data gateway with unified REST and GraphQL APIs for querying scholarly works, authors, sources, and institutions.
- [Hexagraph Privacy Policy: Data Collection & Your Rights](https://hexagraph-docs.voyla.in/legal/privacy-policy.md): How Hexagraph collects, processes, and protects your information when you use the Hexagraph API and research platform. Last updated May 2026.
- [Hexagraph Quickstart: First REST and GraphQL Request](https://hexagraph-docs.voyla.in/quickstart.md): Learn how to make your first Hexagraph API call and run a GraphQL query to retrieve enriched scholarly metadata in under 5 minutes.