#metadata

A live ERC-20 token metadata directory aggregated from the curated, on-chain token lists that wallets and dApps actually trust — Uniswap Labs Default, CoinGecko, 1inch, Aave and the Optimism Superchain list — read keyless from their public endpoints. Resolve any token contract address on any chain to its canonical name, symbol, decimals and logo; list a curated set in full (paged, filterable by chain); search across every list by symbol or name; and discover a token's bridged addresses on other chains. The metadata layer every wallet, swap UI and portfolio tracker needs before it can safely display or transact a token. Live, short cache only — nothing stored.

api.oanor.com/tokenlist-api

A music encyclopedia as an API, powered by TheAudioDB — clean JSON, no key. Search artists and open any artist for their full profile: formed year, country, genre, style and mood, biography, record label, website and social links, and high-resolution images (thumb, logo, banner and fan art). Pull an artist's albums and their music videos, open an album for its description and details and list its tracks, and see what is trending now. Live data straight from TheAudioDB community database. Distinct from streaming and metadata APIs: this is the fan-facing music encyclopedia — biographies, artwork and music videos — ideal for music apps, artist pages, media galleries and Discord bots. 7 data endpoints. Authenticated with an x-oanor-key; fair-use rate limits per plan.

api.oanor.com/audiodb-api

Spotify music and podcast metadata as an API — no login, no OAuth. Resolve any Spotify track, album, artist or playlist by its id, spotify: URI or open.spotify.com URL and get clean JSON: names, the canonical Spotify ids and URIs, cover art, release dates, durations, explicit flags and 30-second audio previews. Albums come back with their full track list, artists with their top tracks, and playlists with their tracks and owner. A universal resolve endpoint auto-detects the entity type from any Spotify link, and an oEmbed endpoint returns the title, thumbnail and embeddable player HTML for any Spotify URL. Live data straight from Spotify's public embed. Ideal for enriching your catalogue with Spotify ids, building "listen on Spotify" links, previewing tracks, and matching music across services. 6 data endpoints. Authenticated with an x-oanor-key; fair-use rate limits per plan.

api.oanor.com/spotify-api

The open music-metadata database as an API — artists, release-groups (albums), releases, recordings and labels, identified by stable MusicBrainz IDs (MBIDs), returned as clean JSON. Search any entity by name or Lucene query; look up an artist with their external links and tags, an album, a release with its full track list, a recording with its ISRCs, or a label; and browse an artist's complete discography. Live data with MBIDs, disambiguations, types, countries, life spans, ISRCs, barcodes, catalogue numbers and relations — the canonical identifiers that link and de-duplicate music data across services. Ideal for metadata enrichment and matching, music catalogues, tagging and library tools, and research. 11 data endpoints. Authenticated with an x-oanor-key; fair-use rate limits per plan.

api.oanor.com/musicbrainz-api

BioSamples as an API, powered by EMBL-EBI — the database that stores and links the metadata of biological samples, the physical specimens behind biological experiments. A sample in BioSamples carries a stable accession (such as SAMEA3231268) and a rich set of characteristics — organism, tissue or organism part, cell type, sex, disease, developmental stage, strain and any submitter-provided attributes — and is referenced by other EBI archives including the European Nucleotide Archive (ENA), ArrayExpress and PRIDE. /v1/search?q=liver searches samples by free text and returns each match's accession, name, organism and release date. /v1/sample?id=SAMEA3231268 returns a sample's metadata — its accession, name, NCBI taxon id, organism, release and update dates, the number of relationships to other samples, and its characteristics flattened to a clean key→value map. Accessions look like SAMEA…, SAMN… or SAMD…; get one from the search endpoint. Ideal for life-science data integration, sample tracking, metadata harmonisation and linking sequencing or expression data back to its source specimen. Data from EMBL-EBI BioSamples (public). This is a biological-sample metadata registry — distinct from study (BioStudies), sequence (ENA), variant (ClinVar) and structure databases.

api.oanor.com/biosamples-api

BioStudies as an API, powered by EMBL-EBI — the database that holds the descriptions of biological studies and links their data together across EBI resources, including imaging (BioImage Archive), functional genomics (ArrayExpress), proteomics, and the literature (Europe PMC). Each study has an accession, a title and abstract, the collection it belongs to and links to its underlying data and publications. /v1/search?query=covid searches the studies and returns each match's accession (e.g. S-EPMC8017430), title, author, study type, release date and link/file counts. /v1/study?id=S-EPMC8017430 returns a study's metadata — its accession, the collection it belongs to (such as EuropePMC, ArrayExpress or BioImages), title, abstract, release date, authors and the number of linked resources. Accessions look like S-EPMC8017430 or S-BSST123; get one from the search endpoint. Ideal for research-data discovery, linking literature to its underlying datasets, systematic reviews and reproducibility tooling. Data from EMBL-EBI BioStudies (public). This is a studies and datasets metadata index — distinct from the sequence (UniProt, ENA), structure (PDB, EMDB), variant (ClinVar) and ontology databases.

api.oanor.com/biostudies-api