HTTP API
The current stable HTTP API is reachable under /api/v1 on a Prometheus server. Any non-breaking additions will be added under that endpoint.
Format overview
The API response format is JSON. Every successful API request returns a 2xx status code.
Invalid requests that reach the API handlers return a JSON error object and one of the following HTTP response codes:
400 Bad Requestwhen parameters are missing or incorrect.422 Unprocessable Entitywhen an expression can't be executed (RFC4918).503 Service Unavailablewhen queries time out or abort.
Other non-2xx codes may be returned for errors occurring before the API endpoint is reached.
An array of warnings may be returned if there are errors that do not inhibit the request execution. All of the data that was successfully collected will be returned in the data field.
The JSON response envelope format is as follows:
{
"status": "success" | "error",
"data": <data>,
// Only set if status is "error". The data field may still hold
// additional data.
"errorType": "<string>",
"error": "<string>",
// Only if there were warnings while executing the request.
// There will still be data in the data field.
"warnings": ["<string>"]
}
Generic placeholders are defined as follows:
<rfc3339 | unix_timestamp>: Input timestamps may be provided either in RFC3339 format or as a Unix timestamp in seconds, with optional decimal places for sub-second precision. Output timestamps are always represented as Unix timestamps in seconds.<series_selector>: Prometheus time series selectors likehttp_requests_totalorhttp_requests_total{method=~"(GET|POST)"}and need to be URL-encoded.<duration>: Prometheus duration strings. For example,5mrefers to a duration of 5 minutes.<bool>: boolean values (stringstrueandfalse).
Note: Names of query parameters that may be repeated end with [].
Expression queries
Query language expressions may be evaluated at a single instant or over a range of time. The sections below describe the API endpoints for each type of expression query.
Instant queries
The following endpoint evaluates an instant query at a single point in time:
GET /api/v1/query
POST /api/v1/query
URL query parameters:
query=<string>: Prometheus expression query string.time=<rfc3339 | unix_timestamp>: Evaluation timestamp. Optional.timeout=<duration>: Evaluation timeout. Optional. Defaults to and is capped by the value of the-query.timeoutflag.
The current server time is used if the time parameter is omitted.
You can URL-encode these parameters directly in the request body by using the POST method and Content-Type: application/x-www-form-urlencoded header. This is useful when specifying a large query that may breach server-side URL character limits.
The data section of the query result has the following format:
{
"resultType": "matrix" | "vector" | "scalar" | "string",
"result": <value>
}
<value> refers to the query result data, which has varying formats depending on the resultType. See the expression query result formats.
The following example evaluates the expression up at the time 2015-07-01T20:10:51.781Z:
$ curl 'http://localhost:9090/api/v1/query?query=up&time=2015-07-01T20:10:51.781Z'
{
"status" : "success",
"data" : {
"resultType" : "vector",
"result" : [
{
"metric" : {
"__name__" : "up",
"job" : "prometheus",
"instance" : "localhost:9090"
},
"value": [ 1435781451.781, "1" ]
},
{
"metric" : {
"__name__" : "up",
"job" : "node",
"instance" : "localhost:9100"
},
"value" : [ 1435781451.781, "0" ]
}
]
}
}
Range queries
The following endpoint evaluates an expression query over a range of time:
GET /api/v1/query_range
POST /api/v1/query_range
URL query parameters:
query=<string>: Prometheus expression query string.start=<rfc3339 | unix_timestamp>: Start timestamp, inclusive.end=<rfc3339 | unix_timestamp>: End timestamp, inclusive.step=<duration | float>: Query resolution step width indurationformat or float number of seconds.timeout=<duration>: Evaluation timeout. Optional. Defaults to and is capped by the value of the-query.timeoutflag.
You can URL-encode these parameters directly in the request body by using the POST method and Content-Type: application/x-www-form-urlencoded header. This is useful when specifying a large query that may breach server-side URL character limits.
The data section of the query result has the following format:
{
"resultType": "matrix",
"result": <value>
}
For the format of the <value> placeholder, see the range-vector result format.
The following example evaluates the expression up over a 30-second range with a query resolution of 15 seconds.
$ curl 'http://localhost:9090/api/v1/query_range?query=up&start=2015-07-01T20:10:30.781Z&end=2015-07-01T20:11:00.781Z&step=15s'
{
"status" : "success",
"data" : {
"resultType" : "matrix",
"result" : [
{
"metric" : {
"__name__" : "up",
"job" : "prometheus",
"instance" : "localhost:9090"
},
"values" : [
[ 1435781430.781, "1" ],
[ 1435781445.781, "1" ],
[ 1435781460.781, "1" ]
]
},
{
"metric" : {
"__name__" : "up",
"job" : "node",
"instance" : "localhost:9091"
},
"values" : [
[ 1435781430.781, "0" ],
[ 1435781445.781, "0" ],
[ 1435781460.781, "1" ]
]
}
]
}
}
Querying metadata
Prometheus offers a set of API endpoints to query metadata about series and their labels.
NOTE: These API endpoints may return metadata for series for which there is no sample within the selected time range, and/or for series whose samples have been marked as deleted via the deletion API endpoint. The exact extent of additionally returned series metadata is an implementation detail that may change in the future.Finding series by label matchers
The following endpoint returns the list of time series that match a certain label set.
GET /api/v1/series
POST /api/v1/series
URL query parameters:
match[]=<series_selector>: Repeated series selector argument that selects the series to return. At least onematch[]argument must be provided.start=<rfc3339 | unix_timestamp>: Start timestamp.end=<rfc3339 | unix_timestamp>: End timestamp.
You can URL-encode these parameters directly in the request body by using the POST method and Content-Type: application/x-www-form-urlencoded header. This is useful when specifying a large or dynamic number of series selectors that may breach server-side URL character limits.
The data section of the query result consists of a list of objects that contain the label name/value pairs which identify each series.
The following example returns all series that match either of the selectors up or process_start_time_seconds{job="prometheus"}:
$ curl -g 'http://localhost:9090/api/v1/series?' --data-urlencode 'match[]=up' --data-urlencode 'match[]=process_start_time_seconds{job="prometheus"}'
{
"status" : "success",
"data" : [
{
"__name__" : "up",
"job" : "prometheus",
"instance" : "localhost:9090"
},
{
"__name__" : "up",
"job" : "node",
"instance" : "localhost:9091"
},
{
"__name__" : "process_start_time_seconds",
"job" : "prometheus",
"instance" : "localhost:9090"
}
]
}
Getting label names
The following endpoint returns a list of label names:
GET /api/v1/labels
POST /api/v1/labels
URL query parameters:
start=<rfc3339 | unix_timestamp>: Start timestamp. Optional.end=<rfc3339 | unix_timestamp>: End timestamp. Optional.match[]=<series_selector>: Repeated series selector argument that selects the series from which to read the label names. Optional.
The data section of the JSON response is a list of string label names.
Here is an example.
$ curl 'localhost:9090/api/v1/labels'
{
"status": "success",
"data": [
"__name__",
"call",
"code",
"config",
"dialer_name",
"endpoint",
"event",
"goversion",
"handler",
"instance",
"interval",
"job",
"le",
"listener_name",
"name",
"quantile",
"reason",
"role",
"scrape_job",
"slice",
"version"
]
}
Querying label values
The following endpoint returns a list of label values for a provided label name:
GET /api/v1/label/<label_name>/values
URL query parameters:
start=<rfc3339 | unix_timestamp>: Start timestamp. Optional.end=<rfc3339 | unix_timestamp>: End timestamp. Optional.match[]=<series_selector>: Repeated series selector argument that selects the series from which to read the label values. Optional.
The data section of the JSON response is a list of string label values.
This example queries for all label values for the job label:
$ curl http://localhost:9090/api/v1/label/job/values
{
"status" : "success",
"data" : [
"node",
"prometheus"
]
}
Querying exemplars
This is experimental and might change in the future. The following endpoint returns a list of exemplars for a valid PromQL query for a specific time range:
GET /api/v1/query_exemplars
POST /api/v1/query_exemplars
URL query parameters:
query=<string>: Prometheus expression query string.start=<rfc3339 | unix_timestamp>: Start timestamp.end=<rfc3339 | unix_timestamp>: End timestamp.
$ curl -g 'http://localhost:9090/api/v1/query_exemplars?query=test_exemplar_metric_total&start=2020-09-14T15:22:25.479Z&end=2020-09-14T15:23:25.479Z'
{
"status": "success",
"data": [
{
"seriesLabels": {
"__name__": "test_exemplar_metric_total",
"instance": "localhost:8090",
"job": "prometheus",
"service": "bar"
},
"exemplars": [
{
"labels": {
"traceID": "EpTxMJ40fUus7aGY"
},
"value": "6",
"timestamp": 1600096945.479,
}
]
},
{
"seriesLabels": {
"__name__": "test_exemplar_metric_total",
"instance": "localhost:8090",
"job": "prometheus",
"service": "foo"
},
"exemplars": [
{
"labels": {
"traceID": "Olp9XHlq763ccsfa"
},
"value": "19",
"timestamp": 1600096955.479,
},
{
"labels": {
"traceID": "hCtjygkIHwAN9vs4"
},
"value": "20",
"timestamp": 1600096965.489,
},
]
}
]
}
Expression query result formats
Expression queries may return the following response values in the result property of the data section. <sample_value> placeholders are numeric sample values. JSON does not support special float values such as NaN, Inf, and -Inf, so sample values are transferred as quoted JSON strings rather than raw numbers.
Range vectors
Range vectors are returned as result type matrix. The corresponding result property has the following format:
[
{
"metric": { "<label_name>": "<label_value>", ... },
"values": [ [ <unix_time>, "<sample_value>" ], ... ]
},
...
]
Instant vectors
Instant vectors are returned as result type vector. The corresponding result property has the following format:
[
{
"metric": { "<label_name>": "<label_value>", ... },
"value": [ <unix_time>, "<sample_value>" ]
},
...
]
Scalars
Scalar results are returned as result type scalar. The corresponding result property has the following format:
[ <unix_time>, "<scalar_value>" ]
Strings
String results are returned as result type string. The corresponding result property has the following format:
[ <unix_time>, "<string_value>" ]
Targets
The following endpoint returns an overview of the current state of the Prometheus target discovery:
GET /api/v1/targets
Both the active and dropped targets are part of the response by default. labels represents the label set after relabelling has occurred. discoveredLabels represent the unmodified labels retrieved during service discovery before relabelling has occurred.
$ curl http://localhost:9090/api/v1/targets
{
"status": "success",
"data": {
"activeTargets": [
{
"discoveredLabels": {
"__address__": "127.0.0.1:9090",
"__metrics_path__": "/metrics",
"__scheme__": "http",
"job": "prometheus"
},
"labels": {
"instance": "127.0.0.1:9090",
"job": "prometheus"
},
"scrapePool": "prometheus",
"scrapeUrl": "http://127.0.0.1:9090/metrics",
"globalUrl": "http://example-prometheus:9090/metrics",
"lastError": "",
"lastScrape": "2017-01-17T15:07:44.723715405+01:00",
"lastScrapeDuration": 0.050688943,
"health": "up",
"scrapeInterval": "1m",
"scrapeTimeout": "10s"
}
],
"droppedTargets": [
{
"discoveredLabels": {
"__address__": "127.0.0.1:9100",
"__metrics_path__": "/metrics",
"__scheme__": "http",
"__scrape_interval__": "1m",
"__scrape_timeout__": "10s",
"job": "node"
},
}
]
}
}
The state query parameter allows the caller to filter by active or dropped targets, (e.g., state=active, state=dropped, state=any). Note that an empty array is still returned for targets that are filtered out. Other values are ignored.
$ curl 'http://localhost:9090/api/v1/targets?state=active'
{
"status": "success",
"data": {
"activeTargets": [
{
"discoveredLabels": {
"__address__": "127.0.0.1:9090",
"__metrics_path__": "/metrics",
"__scheme__": "http",
"job": "prometheus"
},
"labels": {
"instance": "127.0.0.1:9090",
"job": "prometheus"
},
"scrapePool": "prometheus",
"scrapeUrl": "http://127.0.0.1:9090/metrics",
"globalUrl": "http://example-prometheus:9090/metrics",
"lastError": "",
"lastScrape": "2017-01-17T15:07:44.723715405+01:00",
"lastScrapeDuration": 50688943,
"health": "up"
}
],
"droppedTargets": []
}
}
Rules
The /rules API endpoint returns a list of alerting and recording rules that are currently loaded. In addition it returns the currently active alerts fired by the Prometheus instance of each alerting rule.
As the /rules endpoint is fairly new, it does not have the same stability guarantees as the overarching API v1.
GET /api/v1/rules
URL query parameters: - type=alert|record: return only the alerting rules (e.g. type=alert) or the recording rules (e.g. type=record). When the parameter is absent or empty, no filtering is done.
$ curl http://localhost:9090/api/v1/rules
{
"data": {
"groups": [
{
"rules": [
{
"alerts": [
{
"activeAt": "2018-07-04T20:27:12.60602144+02:00",
"annotations": {
"summary": "High request latency"
},
"labels": {
"alertname": "HighRequestLatency",
"severity": "page"
},
"state": "firing",
"value": "1e+00"
}
],
"annotations": {
"summary": "High request latency"
},
"duration": 600,
"health": "ok",
"labels": {
"severity": "page"
},
"name": "HighRequestLatency",
"query": "job:request_latency_seconds:mean5m{job=\"myjob\"} > 0.5",
"type": "alerting"
},
{
"health": "ok",
"name": "job:http_inprogress_requests:sum",
"query": "sum by (job) (http_inprogress_requests)",
"type": "recording"
}
],
"file": "/rules.yaml",
"interval": 60,
"name": "example"
}
]
},
"status": "success"
}
Alerts
The /alerts endpoint returns a list of all active alerts.
As the /alerts endpoint is fairly new, it does not have the same stability guarantees as the overarching API v1.
GET /api/v1/alerts
$ curl http://localhost:9090/api/v1/alerts
{
"data": {
"alerts": [
{
"activeAt": "2018-07-04T20:27:12.60602144+02:00",
"annotations": {},
"labels": {
"alertname": "my-alert"
},
"state": "firing",
"value": "1e+00"
}
]
},
"status": "success"
}
Querying target metadata
The following endpoint returns metadata about metrics currently scraped from targets. This is experimental and might change in the future.
GET /api/v1/targets/metadata
URL query parameters:
match_target=<label_selectors>: Label selectors that match targets by their label sets. All targets are selected if left empty.metric=<string>: A metric name to retrieve metadata for. All metric metadata is retrieved if left empty.limit=<number>: Maximum number of targets to match.
The data section of the query result consists of a list of objects that contain metric metadata and the target label set.
The following example returns all metadata entries for the go_goroutines metric from the first two targets with label job="prometheus".
curl -G http://localhost:9091/api/v1/targets/metadata \
--data-urlencode 'metric=go_goroutines' \
--data-urlencode 'match_target={job="prometheus"}' \
--data-urlencode 'limit=2'
{
"status": "success",
"data": [
{
"target": {
"instance": "127.0.0.1:9090",
"job": "prometheus"
},
"type": "gauge",
"help": "Number of goroutines that currently exist.",
"unit": ""
},
{
"target": {
"instance": "127.0.0.1:9091",
"job": "prometheus"
},
"type": "gauge",
"help": "Number of goroutines that currently exist.",
"unit": ""
}
]
}
The following example returns metadata for all metrics for all targets with label instance="127.0.0.1:9090.
curl -G http://localhost:9091/api/v1/targets/metadata \
--data-urlencode 'match_target={instance="127.0.0.1:9090"}'
{
"status": "success",
"data": [
// ...
{
"target": {
"instance": "127.0.0.1:9090",
"job": "prometheus"
},
"metric": "prometheus_treecache_zookeeper_failures_total",
"type": "counter",
"help": "The total number of ZooKeeper failures.",
"unit": ""
},
{
"target": {
"instance": "127.0.0.1:9090",
"job": "prometheus"
},
"metric": "prometheus_tsdb_reloads_total",
"type": "counter",
"help": "Number of times the database reloaded block data from disk.",
"unit": ""
},
// ...
]
}
Querying metric metadata
It returns metadata about metrics currently scrapped from targets. However, it does not provide any target information. This is considered experimental and might change in the future.
GET /api/v1/metadata
URL query parameters:
limit=<number>: Maximum number of metrics to return.metric=<string>: A metric name to filter metadata for. All metric metadata is retrieved if left empty.
The data section of the query result consists of an object where each key is a metric name and each value is a list of unique metadata objects, as exposed for that metric name across all targets.
The following example returns two metrics. Note that the metric http_requests_total has more than one object in the list. At least one target has a value for HELP that do not match with the rest.
curl -G http://localhost:9090/api/v1/metadata?limit=2
{
"status": "success",
"data": {
"cortex_ring_tokens": [
{
"type": "gauge",
"help": "Number of tokens in the ring",
"unit": ""
}
],
"http_requests_total": [
{
"type": "counter",
"help": "Number of HTTP requests",
"unit": ""
},
{
"type": "counter",
"help": "Amount of HTTP requests",
"unit": ""
}
]
}
}
The following example returns metadata only for the metric http_requests_total.
curl -G http://localhost:9090/api/v1/metadata?metric=http_requests_total
{
"status": "success",
"data": {
"http_requests_total": [
{
"type": "counter",
"help": "Number of HTTP requests",
"unit": ""
},
{
"type": "counter",
"help": "Amount of HTTP requests",
"unit": ""
}
]
}
}
Alertmanagers
The following endpoint returns an overview of the current state of the Prometheus alertmanager discovery:
GET /api/v1/alertmanagers
Both the active and dropped Alertmanagers are part of the response.
$ curl http://localhost:9090/api/v1/alertmanagers
{
"status": "success",
"data": {
"activeAlertmanagers": [
{
"url": "http://127.0.0.1:9090/api/v1/alerts"
}
],
"droppedAlertmanagers": [
{
"url": "http://127.0.0.1:9093/api/v1/alerts"
}
]
}
}
Status
Following status endpoints expose current Prometheus configuration.
Config
The following endpoint returns currently loaded configuration file:
GET /api/v1/status/config
The config is returned as dumped YAML file. Due to limitation of the YAML library, YAML comments are not included.
$ curl http://localhost:9090/api/v1/status/config
{
"status": "success",
"data": {
"yaml": "<content of the loaded config file in YAML>",
}
}
Flags
The following endpoint returns flag values that Prometheus was configured with:
GET /api/v1/status/flags
All values are of the result type string.
$ curl http://localhost:9090/api/v1/status/flags
{
"status": "success",
"data": {
"alertmanager.notification-queue-capacity": "10000",
"alertmanager.timeout": "10s",
"log.level": "info",
"query.lookback-delta": "5m",
"query.max-concurrency": "20",
...
}
}
New in v2.2
Runtime Information
The following endpoint returns various runtime information properties about the Prometheus server:
GET /api/v1/status/runtimeinfo
The returned values are of different types, depending on the nature of the runtime property.
$ curl http://localhost:9090/api/v1/status/runtimeinfo
{
"status": "success",
"data": {
"startTime": "2019-11-02T17:23:59.301361365+01:00",
"CWD": "/",
"reloadConfigSuccess": true,
"lastConfigTime": "2019-11-02T17:23:59+01:00",
"timeSeriesCount": 873,
"corruptionCount": 0,
"goroutineCount": 48,
"GOMAXPROCS": 4,
"GOGC": "",
"GODEBUG": "",
"storageRetention": "15d"
}
}
New in v2.14
Build Information
The following endpoint returns various build information properties about the Prometheus server:
GET /api/v1/status/buildinfo
All values are of the result type string.
$ curl http://localhost:9090/api/v1/status/buildinfo
{
"status": "success",
"data": {
"version": "2.13.1",
"revision": "cb7cbad5f9a2823a622aaa668833ca04f50a0ea7",
"branch": "master",
"buildUser": "[email protected]",
"buildDate": "20191102-16:19:59",
"goVersion": "go1.13.1"
}
}
New in v2.14
TSDB Stats
The following endpoint returns various cardinality statistics about the Prometheus TSDB:
GET /api/v1/status/tsdb
- headStats: This provides the following data about the head block of the TSDB:
- numSeries: The number of series.
- chunkCount: The number of chunks.
- minTime: The current minimum timestamp in milliseconds.
- maxTime: The current maximum timestamp in milliseconds.
- seriesCountByMetricName: This will provide a list of metrics names and their series count.
- labelValueCountByLabelName: This will provide a list of the label names and their value count.
- memoryInBytesByLabelName This will provide a list of the label names and memory used in bytes. Memory usage is calculated by adding the length of all values for a given label name.
- seriesCountByLabelPair This will provide a list of label value pairs and their series count.
$ curl http://localhost:9090/api/v1/status/tsdb
{
"status": "success",
"data": {
"headStats": {
"numSeries": 508,
"chunkCount": 937,
"minTime": 1591516800000,
"maxTime": 1598896800143,
},
"seriesCountByMetricName": [
{
"name": "net_conntrack_dialer_conn_failed_total",
"value": 20
},
{
"name": "prometheus_http_request_duration_seconds_bucket",
"value": 20
}
],
"labelValueCountByLabelName": [
{
"name": "__name__",
"value": 211
},
{
"name": "event",
"value": 3
}
],
"memoryInBytesByLabelName": [
{
"name": "__name__",
"value": 8266
},
{
"name": "instance",
"value": 28
}
],
"seriesCountByLabelValuePair": [
{
"name": "job=prometheus",
"value": 425
},
{
"name": "instance=localhost:9090",
"value": 425
}
]
}
}
New in v2.15
WAL Replay Stats
The following endpoint returns information about the WAL replay:
GET /api/v1/status/walreplay
read: The number of segments replayed so far. total: The total number segments needed to be replayed. progress: The progress of the replay (0 - 100%). state: The state of the replay. Possible states: - waiting: Waiting for the replay to start. - in progress: The replay is in progress. - done: The replay has finished.
$ curl http://localhost:9090/api/v1/status/walreplay
{
"status": "success",
"data": {
"min": 2,
"max": 5,
"current": 40,
"state": "in progress"
}
}
New in v2.28
TSDB Admin APIs
These are APIs that expose database functionalities for the advanced user. These APIs are not enabled unless the --web.enable-admin-api is set.
Snapshot
Snapshot creates a snapshot of all current data into snapshots/<datetime>-<rand> under the TSDB's data directory and returns the directory as response. It will optionally skip snapshotting data that is only present in the head block, and which has not yet been compacted to disk.
POST /api/v1/admin/tsdb/snapshot
PUT /api/v1/admin/tsdb/snapshot
URL query parameters:
skip_head=<bool>: Skip data present in the head block. Optional.
$ curl -XPOST http://localhost:9090/api/v1/admin/tsdb/snapshot
{
"status": "success",
"data": {
"name": "20171210T211224Z-2be650b6d019eb54"
}
}
The snapshot now exists at <data-dir>/snapshots/20171210T211224Z-2be650b6d019eb54
New in v2.1 and supports PUT from v2.9
Delete Series
DeleteSeries deletes data for a selection of series in a time range. The actual data still exists on disk and is cleaned up in future compactions or can be explicitly cleaned up by hitting the Clean Tombstones endpoint.
If successful, a 204 is returned.
POST /api/v1/admin/tsdb/delete_series
PUT /api/v1/admin/tsdb/delete_series
URL query parameters:
match[]=<series_selector>: Repeated label matcher argument that selects the series to delete. At least onematch[]argument must be provided.start=<rfc3339 | unix_timestamp>: Start timestamp. Optional and defaults to minimum possible time.end=<rfc3339 | unix_timestamp>: End timestamp. Optional and defaults to maximum possible time.
Not mentioning both start and end times would clear all the data for the matched series in the database.
Example:
$ curl -X POST \
-g 'http://localhost:9090/api/v1/admin/tsdb/delete_series?match[]=up&match[]=process_start_time_seconds{job="prometheus"}'
New in v2.1 and supports PUT from v2.9
Clean Tombstones
CleanTombstones removes the deleted data from disk and cleans up the existing tombstones. This can be used after deleting series to free up space.
If successful, a 204 is returned.
POST /api/v1/admin/tsdb/clean_tombstones
PUT /api/v1/admin/tsdb/clean_tombstones
This takes no parameters or body.
$ curl -XPOST http://localhost:9090/api/v1/admin/tsdb/clean_tombstones
New in v2.1 and supports PUT from v2.9
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