Notice: This project has been deprecated.
On 2024-11-27, Spotify introduced changes to their Web API that removed features this project utilized. By removing audio features and audio analysis, MetaGrab has ceased to be useful compared to other similar projects. One of MetaGrab's unique features was the showing of all the sections that Spotify has on a particular track and the key, time signature, tempo, etc. associated with each section. Without this feature, I do not see a point in continuing to maintain this project. Thank you for understanding.
Spotify API alternatives:
Other databases for music analysis (often much more accurate than Spotify):
An API that grabs Spotify's metadata for any track you'd like!
This is the API used by my other project, MetaGrab. It's written in Go and grabs Spotify's metadata about any track on its platform. Metadata is data about other data. Track metadata can include artists, what album the track appeared on, and the qualitative feel of the track.
config.example.json is an example for the config that then becomes config.json. The config becomes a struct as such:
typeConfigurationstruct {
//ID and Secret are obtained at https://developer.spotify.com/dashboard/IDstring// IDSecretstring// SECRET//SearchLimit is an integer that sets the maximum number of search results (type misc.Search) given by the search.GetSearch functionSearchLimitint// SEARCH_LIMIT//RateBucket is the size of the bucket filled at the rate defined by RateLimit, for use for the ratelimit middleware functionalityRateLimit time.Duration// RATE_LIMITRateBucketint// RATE_BUCKET//BindAddress is the address in which the API is hostedBindAddressstring// BIND_ADDRESS//AccessControl is a domain that all API access is restricted to in the Access-Control-Allow-Origin headerAccessControlstring// ACCESS_CONTROL
}The track enpoint provides a JSON of the track associated with the track ID parameter. The track ID is a base-62 identifier assigned to every track by Spotify and can be found at the end of a Spotify URI. The track struct is the combination of information retrieved by multiple Spotify endpoints, all of which are defined as such:
//Info is catalog information for a single tracktypeInfostruct {
//Album on which the track appears. This is considered a "simplified album object", and is mostly used to feed the track.GetAlbum function, which returns a misc.AlbumAlbumstruct {
//The Spotify ID for the albumIDstring`json:"id"`//The cover art for the album in various sizes, widest firstImages []struct {
//The source URL of the imageURLstring`json:"url"`
} `json:"images"`//The name of the album. In case of an album takedown, the value may be an empty stringNamestring`json:"name"`
} `json:"album"`//Artists who performed the track. This in considered a "simplified artist object"Artists []struct {
//The name of the artistNamestring`json:"name"`//The Spotify URI for the artistURIstring`json:"uri"`
} `json:"artists"`//A list of the countries in which the track can be played, identified by their ISO 3166-1 alpha-2 code.AvailableMarkets []string`json:"available_markets"`//Whether or not the track has explicit lyrics (true = yes it does; false = no it does not OR unknown)Explicitbool`json:"explicit"`//The Spotify ID for the trackIDstring`json:"id"`//The name of the trackNamestring`json:"name"`//The popularity of the track. The value will be between 0 and 100, with 100 being the most popular//The popularity of a track is a value between 0 and 100, with 100 being the most popular. The popularity is calculated by algorithm and is based, in the most part, on the total number of plays the track has had and how recent those plays are//Generally speaking, songs that are being played a lot now will have a higher popularity than songs that were played a lot in the past. Duplicate tracks (e.g. the same track from a single and an album) are rated independently. Artist and album popularity is derived mathematically from track popularity. Note that the popularity value may lag actual popularity by a few days: the value is not updated in real timePopularityint`json:"popularity"`//The number of the track. If an album has several discs, the track number is the number on the specified discNumberint`json:"track_number"`//The Spotify URI for the trackURIstring`json:"uri"`
}
//Album is catalog information for a single albumtypeAlbumstruct {
//The type of the album: one of "Album", "Single", or "Compilation".Typestring`json:"album_type"`//The Spotify ID for the albumIDstring`json:"id"`//The cover art for the album in various sizes, widest firstImages []struct {
//The source URL of the imageURLstring`json:"url"`
} `json:"images"`//The music label for the albumLabelstring`json:"label"`//The name of the album. In case of an album takedown, the value may be an empty stringNamestring`json:"name"`//The date the album was first released, formatted depending on the 3 possible values held by DatePrec//"year": yyyy (e.g. "1981")//"month": MMM-yyyy (e.g. "Dec-1981")//"day": dd-MMM-yyyy (e.g. "15-Dec-1981")Datestring`json:"release_date"`DatePrecstring`json:"release_date_precision"`//The Spotify URI for the albumURIstring`json:"uri"`
}
//Features contains audio feature informationtypeFeaturesstruct {
//The duration of the track in millisecondsDurationint`json:"duration_ms"`//The estimated overall key of the track. Integers map to pitches using standard Pitch Class notation. (e.g. 0 = C, 1 = C♯/D♭, 2 = D, etc.). If no key was detected, the value is -1Keyint`json:"key"`//Mode indicates the modality (major or minor) of a track, the type of scale from which its melodic content is derived. Major is represented by 1 and minor is 0Modeint`json:"mode"`//An estimated overall time signature of a track. The time signature (meter) is a notational convention to specify how many beats are in each bar (or measure). The time signature ranges from 3 to 7 indicating time signatures of “3/4”, to “7/4”. Spotify only returns a single integer, which may or may not be very usefulTimeSigint`json:"time_signature"`//A confidence measure from 0.0 to 1.0 of whether the track is acoustic. 1.0 represents high confidence the track is acousticAcousticnessfloat64`json:"acousticness"`//Danceability describes how suitable a track is for dancing based on a combination of musical elements including tempo, rhythm stability, beat strength, and overall regularity. A value of 0.0 is least danceable and 1.0 is most danceableDanceabilityfloat64`json:"danceability"`//Energy is a measure from 0.0 to 1.0 and represents a perceptual measure of intensity and activity. Typically, energetic tracks feel fast, loud, and noisy. Perceptual features contributing to this attribute include dynamic range, perceived loudness, timbre, onset rate, and general entropyEnergyfloat64`json:"energy"`//Predicts whether a track contains no vocals. “Ooh” and “aah” sounds are treated as instrumental in this context. Rap or spoken word tracks are clearly “vocal”. The closer the instrumentalness value is to 1.0, the greater likelihood the track contains no vocal content. Values above 0.5 are intended to represent instrumental tracks, but confidence is higher as the value approaches 1.0Instrumentalnessfloat64`json:"instrumentalness"`//Detects the presence of an audience in the recording. Higher liveness values represent an increased probability that the track was performed live. A value above 0.8 provides strong likelihood that the track is liveLivenessfloat64`json:"liveness"`//The overall loudness of a track in decibels (dB). Loudness values are averaged across the entire track and are useful for comparing relative loudness of tracks. Loudness is the quality of a sound that is the primary psychological correlate of physical strength (amplitude). Values typical range between -60 and 0 dbLoudnessfloat64`json:"loudness"`//Speechiness detects the presence of spoken words in a track. The more exclusively speech-like the recording (e.g. talk show, audio book, poetry), the closer to 1.0 the attribute value. Values above 0.66 describe tracks that are probably made entirely of spoken words. Values between 0.33 and 0.66 describe tracks that may contain both music and speech, either in sections or layered, including such cases as rap music. Values below 0.33 most likely represent music and other non-speech-like tracksSpeechinessfloat64`json:"speechiness"`//A measure from 0.0 to 1.0 describing the musical positiveness conveyed by a track. Tracks with high valence sound more positive (e.g. happy, cheerful, euphoric), while tracks with low valence sound more negative (e.g. sad, depressed, angry)Valencefloat64`json:"valence"`//The overall estimated tempo of a track in beats per minute (BPM). In musical terminology, tempo is the speed or pace of a given piece and derives directly from the average beat durationTempofloat64`json:"tempo"`
}
//Analysis is detailed low-level audio analysis for a single track, describing the track's structure and musical contenttypeAnalysisstruct {
//Sections are defined by large variations in rhythm or timbreSections []struct {
//The starting point (in seconds) of the time intervalStartfloat64`json:"start"`//The duration (in seconds) of the time intervalDurationfloat64`json:"duration"`//The confidence, from 0.0 to 1.0, of the reliability of the intervalConffloat64`json:"confidence"`//The overall loudness of the section in decibels (dB)Loudnessfloat64`json:"loudness"`//The overall estimated tempo of the section in beats per minute (BPM)//The confidence, from 0.0 to 1.0, is the reliability of the tempo. Some tracks contain tempo changes or sounds which don’t contain tempo (like pure speech) which would correspond to a low value in this fieldTempofloat64`json:"tempo"`TempoConffloat64`json:"tempo_confidence"`//The estimated overall key of the section. The values in this field ranging from 0 to 11 mapping to pitches using standard Pitch Class notation (e.g. 0 = C, 1 = C♯/D♭, 2 = D, etc.). If no key was detected, the value is -1//The confidence, from 0.0 to 1.0, is the reliability of the key. Songs with many key changes may correspond to low values in this fieldKeyint`json:"key"`KeyConffloat64`json:"key_confidence"`//Indicates the modality (major or minor) of a track, the type of scale from which its melodic content is derived. This field will contain a 0 for “minor”, a 1 for “major”, or a -1 for no result//The confidence, from 0.0 to 1.0, is the reliability of the modeModeint`json:"mode"`ModeConffloat64`json:"mode_confidence"`//An estimated overall time signature of a track. The time signature (meter) is a notational convention to specify how many beats are in each bar (or measure). The time signature ranges from 3 to 7 indicating time signatures of “3/4”, to “7/4”. Spotify only returns a single integer, which may or may not be very useful//The confidence, from 0.0 to 1.0, is the reliability of the time signature. Sections with time signature changes may correspond to low values in this fieldTimeSigint`json:"time_signature"`TimeSigConffloat64`json:"time_signature_confidence"`
} `json:"sections"`
}
//Track struct is a struct that contains all of the above structs and is served at the track endpointtypeTrackstruct {
InfoInfoAlbumAlbumFeaturesFeaturesAnalysisAnalysis
}Here is an example JSON served by this endpoint with the ID 0g5J7GjfRxsunVrrcDLejQ:
{
"Info": {
"album": {
"id":"2TIcThPVCssqowwlTKYEpv",
"images": [
{
"url":"https://i.scdn.co/image/ab67616d0000b273c6b83566875ae494bc4997ab"
},
{
"url":"https://i.scdn.co/image/ab67616d00001e02c6b83566875ae494bc4997ab"
},
{
"url":"https://i.scdn.co/image/ab67616d00004851c6b83566875ae494bc4997ab"
}
],
"name":"Mama Told Me"
},
"artists": [
{
"name":"Alexus",
"uri":"spotify:artist:73aRlPLCZSv6wlTUUK0aFP"
}
],
"available_markets": [
"AD","AE","AL","AR","AT","AU","BA","BE","BG","BH","BO","BR","BY","CA","CH","CL","CO","CR","CY","CZ","DE","DK","DO","DZ","EC","EE","EG","ES","FI","FR","GB","GR","GT","HK","HN","HR","HU","ID","IE","IL","IN","IS","IT","JO","JP","KW","KZ","LB","LI","LT","LU","LV","MA","MC","MD","ME","MK","MT","MX","MY","NI","NL","NO","NZ","OM","PA","PE","PH","PL","PS","PT","PY","QA","RO","RS","RU","SA","SE","SG","SI","SK","SV","TH","TN","TR","TW","UA","US","UY","VN","XK","ZA"
],
"explicit":false,
"id":"0g5J7GjfRxsunVrrcDLejQ",
"name":"Mama Told Me - Original Mix",
"popularity":19,
"track_number":2,
"uri":"spotify:track:0g5J7GjfRxsunVrrcDLejQ"
},
"Album": {
"album_type":"Single",
"id":"2TIcThPVCssqowwlTKYEpv",
"images": [
{
"url":"https://i.scdn.co/image/ab67616d0000b273c6b83566875ae494bc4997ab"
},
{
"url":"https://i.scdn.co/image/ab67616d00001e02c6b83566875ae494bc4997ab"
},
{
"url":"https://i.scdn.co/image/ab67616d00004851c6b83566875ae494bc4997ab"
}
],
"label":"Interphase Digital",
"name":"Mama Told Me",
"release_date":"2-Nov-2012",
"release_date_precision":"day",
"uri":"spotify:album:2TIcThPVCssqowwlTKYEpv"
},
"Features": {
"duration_ms":352125,
"key":3,
"mode":1,
"time_signature":4,
"acousticness":0.00918,
"danceability":0.474,
"energy":0.764,
"instrumentalness":0.263,
"liveness":0.373,
"loudness":-7.2,
"speechiness":0.0533,
"valence":0.532,
"tempo":178.931
},
"Analysis": {
"sections": [
{
"start":0,
"duration":6.48168,
"confidence":1,
"loudness":-24.361,
"tempo":179.689,
"tempo_confidence":0.387,
"key":10,
"key_confidence":0.301,
"mode":1,
"mode_confidence":0.472,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":6.48168,
"duration":16.43191,
"confidence":0.771,
"loudness":-17.123,
"tempo":178.942,
"tempo_confidence":0.638,
"key":0,
"key_confidence":0.648,
"mode":0,
"mode_confidence":0.635,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":22.91359,
"duration":16.75694,
"confidence":1,
"loudness":-7.268,
"tempo":179.042,
"tempo_confidence":0.614,
"key":10,
"key_confidence":0.532,
"mode":0,
"mode_confidence":0.499,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":39.67054,
"duration":25.48386,
"confidence":0.422,
"loudness":-6.589,
"tempo":178.692,
"tempo_confidence":0.42,
"key":3,
"key_confidence":0.383,
"mode":1,
"mode_confidence":0.677,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":65.1544,
"duration":12.49106,
"confidence":1,
"loudness":-19.461,
"tempo":179.19,
"tempo_confidence":0.272,
"key":5,
"key_confidence":0.398,
"mode":0,
"mode_confidence":0.386,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":77.64545,
"duration":31.24873,
"confidence":1,
"loudness":-7.087,
"tempo":177.343,
"tempo_confidence":0.312,
"key":3,
"key_confidence":0.823,
"mode":1,
"mode_confidence":0.763,
"time_signature":4,
"time_signature_confidence":0.163
},
{
"start":108.89418,
"duration":67.03196,
"confidence":0.795,
"loudness":-5.841,
"tempo":178.883,
"tempo_confidence":0.405,
"key":5,
"key_confidence":0.686,
"mode":0,
"mode_confidence":0.642,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":175.92615,
"duration":38.89741,
"confidence":0.515,
"loudness":-5.077,
"tempo":178.892,
"tempo_confidence":0.395,
"key":3,
"key_confidence":0.544,
"mode":1,
"mode_confidence":0.489,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":214.82355,
"duration":18.12729,
"confidence":1,
"loudness":-15,
"tempo":179.619,
"tempo_confidence":0.399,
"key":3,
"key_confidence":0.271,
"mode":1,
"mode_confidence":0.557,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":232.95084,
"duration":18.385,
"confidence":0.848,
"loudness":-8.892,
"tempo":179.292,
"tempo_confidence":0.342,
"key":3,
"key_confidence":0.456,
"mode":1,
"mode_confidence":0.536,
"time_signature":4,
"time_signature_confidence":0.553
},
{
"start":251.33585,
"duration":74.75952,
"confidence":0.858,
"loudness":-6.648,
"tempo":179.001,
"tempo_confidence":0.491,
"key":5,
"key_confidence":0.65,
"mode":0,
"mode_confidence":0.607,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":326.09537,
"duration":13.76423,
"confidence":0.569,
"loudness":-7.039,
"tempo":179.032,
"tempo_confidence":0.653,
"key":3,
"key_confidence":0.343,
"mode":1,
"mode_confidence":0.582,
"time_signature":4,
"time_signature_confidence":1
},
{
"start":339.8596,
"duration":12.26539,
"confidence":0.318,
"loudness":-8.866,
"tempo":180.903,
"tempo_confidence":0.236,
"key":3,
"key_confidence":0.401,
"mode":1,
"mode_confidence":0.647,
"time_signature":4,
"time_signature_confidence":0.857
}
]
}
}The search enpoint provides a JSON of a Spotify search result from the query in the URL. The query matches to tracks by the track name and the artist name. The maximum number of tracks returned by this endpoint can be set by modifying the searchLimit in the config. The search result is defined as such:
//Search is information about tracks that match a keyword string by the track name or artist. This is returned by the search.GetSearch function, and the maximum number of internal track structs is provided by the limit parameter in said functiontypeSearchstruct {
//Each track returned by the searchTracksstruct {
//An Info struct for each track, as defined aboveItems []Info`json:"items"`
} `json:"tracks"`
}Here is an example JSON served by this endpoint with the query bark and a maximum of 3 results:
{
"tracks": {
"items": [
{
"album": {
"id":"537qKeG5gbEvKJpQ4Qmszn",
"images": [
{
"url":"https://i.scdn.co/image/ab67616d0000b273813b607b3b7e094c306af4fd"
},
{
"url":"https://i.scdn.co/image/ab67616d00001e02813b607b3b7e094c306af4fd"
},
{
"url":"https://i.scdn.co/image/ab67616d00004851813b607b3b7e094c306af4fd"
}
],
"name":"Bark At The Moon (Expanded Edition)"
},
"artists": [
{
"name":"Ozzy Osbourne","uri":"spotify:artist:6ZLTlhejhndI4Rh53vYhrY"
}
],
"available_markets": [
"AD","AE","AL","AR","AT","AU","BA","BE","BG","BH","BO","BR","BY","CA","CH","CL","CO","CR","CY","CZ","DE","DK","DO","DZ","EC","EE","EG","ES","FI","FR","GB","GR","GT","HK","HN","HR","HU","ID","IE","IL","IN","IS","IT","JO","JP","KW","KZ","LB","LI","LT","LU","LV","MA","MC","MD","ME","MK","MT","MX","MY","NI","NL","NO","NZ","OM","PA","PE","PH","PL","PS","PT","PY","QA","RO","RS","RU","SA","SE","SG","SI","SK","SV","TH","TN","TR","TW","UA","US","UY","VN","XK","ZA"
],
"explicit":false,
"id":"2E7W1X4maFFcjHrVrFA7Vs",
"name":"Bark at the Moon",
"popularity":66,
"track_number":1,
"uri":"spotify:track:2E7W1X4maFFcjHrVrFA7Vs"
},
{
"album": {
"id":"0pgmZ0HKZYEIr71WHdaMN7",
"images": [
{
"url":"https://i.scdn.co/image/ab67616d0000b273a0d2b590266ae8b25e5ddc4f"
},
{
"url":"https://i.scdn.co/image/ab67616d00001e02a0d2b590266ae8b25e5ddc4f"
},
{
"url":"https://i.scdn.co/image/ab67616d00004851a0d2b590266ae8b25e5ddc4f"
}
],
"name":"Barking"
}, "artists": [
{
"name":"Ramz",
"uri":"spotify:artist:6ywXRaHY7m2DJ0dd7CsLAB"
}
],
"available_markets": [
"AD","AE","AL","AR","AT","AU","BA","BE","BG","BH","BO","BR","BY","CA","CH","CL","CO","CR","CY","CZ","DE","DK","DO","DZ","EC","EE","EG","ES","FI","FR","GB","GR","GT","HK","HN","HR","HU","ID","IE","IL","IN","IS","IT","JO","JP","KW","KZ","LB","LI","LT","LU","LV","MA","MC","MD","ME","MK","MT","MX","MY","NI","NL","NO","NZ","OM","PA","PE","PH","PL","PS","PT","PY","QA","RO","RS","RU","SA","SE","SG","SI","SK","SV","TH","TN","TR","TW","UA","US","UY","VN","XK","ZA"
],
"explicit":false,
"id":"2U5cq89GCnsR1yixKkC8d5",
"name":"Barking",
"popularity":70,
"track_number":1,
"uri":"spotify:track:2U5cq89GCnsR1yixKkC8d5"
},
{
"album": {
"id":"0bJIHF1Or1YBLFBMwv53K2",
"images": [
{
"url":"https://i.scdn.co/image/ab67616d0000b273cfc4b1939aba562fc97159c5"
},
{
"url":"https://i.scdn.co/image/ab67616d00001e02cfc4b1939aba562fc97159c5"
},
{
"url":"https://i.scdn.co/image/ab67616d00004851cfc4b1939aba562fc97159c5"
}
],
"name":"Hotel Diablo"
},
"artists": [
{
"name":"Machine Gun Kelly",
"uri":"spotify:artist:6TIYQ3jFPwQSRmorSezPxX"
},
{
"name":"YUNGBLUD",
"uri":"spotify:artist:6Ad91Jof8Niiw0lGLLi3NW"
},
{
"name":"Travis Barker",
"uri":"spotify:artist:4exLIFE8sISLr28sqG1qNX"
}
],
"available_markets": [
"AD","AE","AL","AR","AT","AU","BA","BE","BG","BH","BO","BR","CA","CH","CL","CO","CR","CY","CZ","DE","DK","DO","DZ","EC","EE","EG","ES","FI","FR","GB","GR","GT","HK","HN","HR","HU","ID","IE","IL","IN","IS","IT","JO","JP","KW","KZ","LB","LI","LT","LU","LV","MA","MC","MD","ME","MK","MT","MX","MY","NI","NL","NO","NZ","OM","PA","PE","PH","PL","PS","PT","PY","QA","RO","RS","RU","SA","SE","SG","SI","SK","SV","TH","TN","TR","TW","UA","US","UY","VN","XK","ZA"
],
"explicit":true,
"id":"2gTdDMpNxIRFSiu7HutMCg",
"name":"I Think I'm OKAY (with YUNGBLUD \u0026 Travis Barker)",
"popularity":80,
"track_number":14,
"uri":"spotify:track:2gTdDMpNxIRFSiu7HutMCg"
}
]
}
}There are a number of things shipped by the Spotify API that is not covered with this API. This may be because they're not very useful, or they're confusing to most users and therefore not needed for most contexts this API is designed for. Here is a list of them with explanations if needed:
- Info -
- Artists -
external_urlshreftype- Literally just the string "artist"
disc_numberexternal_idsexternal_urlshref- Track Relinking (comprising of
is_playable,linked_from, andrestrictions) preview_url- Can be derived easily
- Artists -
- Album -
album_typeavailable_markets- Included in the Info structcopyrightsexternal_idsexternal_urlsgenres- Spotify documents that genre is shipped with albums and artists. This, however, is a lie. Genre is only shipped with artists. For obvious reasons (genre diversity), this is ridiculous. It isn't worth the hassle to grab all the potentially misleading genres from all (multiple!) artists from each track, so it is not covered.hreftracks
- Features -
analysis_urltype
- Analysis -
barsbeatssegmentstatums
Make sure any and all use of this software complies with the license, the GNU Affero General Public License v3.0