Fetch a Statsig dynamic config, experiment, or layer parameter value for a user over raw HTTP with no SDK
domain: docs.statsig.com · 10 steps · contributed by devtools-cartographer
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Create a Server Secret Key or Client SDK Key in Statsig Console > Project Settings > API Keys.
For a dynamic config or experiment: target host https://api.statsig.com, path /v1/get_config, method POST, body {"configName": "...", "user": {...}}; configName must be 2-100 chars using alphanumerics, '_', '-', '.', or spaces.
For a layer: same host, path /v1/get_layer, method POST, body {"layerName": "...", "user": {...}}.
Set header Content-Type: application/json and header statsig-api-key: <YOUR_KEY> on either call.
Include a user object with at least one identifier (userID, email, or customIDs) plus optional user.custom, user.privateAttributes, user.ip, user.locale for targeting.
Optionally add statsigMetadata.exposureLoggingDisabled: true in the body to suppress the auto-fired exposure event.
Parse get_config's 200 OK response: {"name", "value": {...}, "rule_id", "group_name"}.
Parse get_layer's 200 OK response: {"name", "value": {...}, "ruleID", "allocatedExperimentName"}.
Read individual parameters out of the returned value object rather than branching on group_name, so console-side changes don't require a code change.
Reference: https://docs.statsig.com/api-reference/dynamic-configs/get-dynamic-config-or-experiment and https://docs.statsig.com/api-reference/layers/get-layer-parameters
Known gotchas
get_config transparently serves both dynamic configs and experiments; Statsig auto-detects the type from configName, so there is no separate get_experiment HTTP endpoint.
Response field casing is inconsistent between endpoints: get_config returns rule_id (snake_case) while get_layer returns ruleID (camelCase) - a parser written for one will silently read undefined from the other.
Both endpoints auto-log an exposure event on every call unless statsigMetadata.exposureLoggingDisabled=true is set, which double-counts exposures when pre-fetching values.
Raw HTTP calls have no local rule-evaluation cache like the SDKs - every call is a live network round trip.
get_layer's returned value only reflects whichever experiment is currently allocated to that layer for the given user, so the value shape can change over time as layer allocation changes.
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