> ## Documentation Index > Fetch the complete documentation index at: https://www.worldmonitor.app/docs/llms.txt > Use this file to discover all available pages before exploring further. # GetRegimeHistory > GetRegimeHistory returns the region's regime transition log newest-first. Entries are append-only from the seed writer, recorded only when diffRegionalSnapshot reports regime_changed. Premium-gated. PRO-gated. Requires an active Pro subscription. ## OpenAPI ````yaml /api/IntelligenceService.openapi.yaml get /api/intelligence/v1/get-regime-history openapi: 3.1.0 info: title: IntelligenceService API version: 1.0.0 servers: - url: https://api.worldmonitor.app security: - WorldMonitorKey: [] - ApiKeyHeader: [] paths: /api/intelligence/v1/get-regime-history: get: tags: - IntelligenceService summary: GetRegimeHistory description: >- GetRegimeHistory returns the region's regime transition log newest-first. Entries are append-only from the seed writer, recorded only when diffRegionalSnapshot reports regime_changed. Premium-gated. PRO-gated. Requires an active Pro subscription. operationId: GetRegimeHistory parameters: - name: region_id in: query description: >- Display region id (e.g. "mena", "east-asia", "europe"). See shared/geography.js. Kebab-case: lowercase alphanumeric groups separated by single hyphens, no trailing or consecutive hyphens. required: true example: mena schema: type: string pattern: ^[a-z][a-z0-9]*(-[a-z0-9]+)*$ - name: limit in: query description: >- Optional cap on how many entries to return. Defaults to 50 server-side when omitted or <= 0. Hard cap enforced by the handler at 100 (= the writer-side LTRIM cap in regime-history.mjs). required: false example: 25 schema: type: integer format: int32 - name: jmespath in: query description: >- Optional JMESPath expression applied server-side to project or reduce the JSON response before it is returned (mirrors the MCP jmespath argument). Invalid expressions, expressions larger than 1024 UTF-8 bytes, or projections that exceed the 256 KB output cap return HTTP 400 with a {_jmespath_error, original_keys} envelope. Grammar and worked examples: https://www.worldmonitor.app/docs/mcp-jmespath. required: false example: keys(@) schema: type: string responses: '200': description: Successful response content: application/json: example: transitions: - label: example previousLabel: example regionId: mena snapshotId: example-id transitionDriver: example schema: $ref: '#/components/schemas/GetRegimeHistoryResponse' '400': description: Validation error content: application/json: schema: oneOf: - $ref: '#/components/schemas/ValidationError' - $ref: '#/components/schemas/JmespathProjectionError' '401': description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/UnauthorizedError' '403': description: Pro subscription required. content: application/json: schema: $ref: '#/components/schemas/ForbiddenError' '429': description: Rate limit exceeded. headers: X-RateLimit-Limit: description: Maximum requests allowed in the active rate-limit window. schema: type: string X-RateLimit-Remaining: description: Requests remaining in the active rate-limit window. schema: type: string X-RateLimit-Reset: description: >- Unix epoch milliseconds when the active rate-limit window resets. schema: type: string Retry-After: description: Seconds to wait before retrying the request. schema: type: string content: application/json: schema: oneOf: - $ref: '#/components/schemas/Error' - $ref: '#/components/schemas/RateLimitError' default: description: Gateway or handler error response. content: application/json: schema: oneOf: - $ref: '#/components/schemas/Error' - $ref: '#/components/schemas/GatewayError' security: - WorldMonitorKey: [] - ApiKeyHeader: [] - BearerAuth: [] components: schemas: GetRegimeHistoryResponse: type: object properties: transitions: type: array items: $ref: '#/components/schemas/RegimeTransition' description: |- GetRegimeHistoryResponse returns the region's regime transition log newest-first. The list is append-only from the seed writer's perspective: only diffs with regime_changed set produce an entry, so this is a pure transition stream (no steady-state noise). ValidationError: type: object properties: violations: type: array items: $ref: '#/components/schemas/FieldViolation' description: List of validation violations required: - violations description: >- ValidationError is returned when request validation fails. It contains a list of field violations describing what went wrong. JmespathProjectionError: description: >- Returned when a REST jmespath projection is invalid or exceeds the expression/output byte limits. properties: _jmespath_error: description: Projection error discriminator and details. type: string original_keys: description: Top-level keys or shape of the unprojected response. items: type: string type: array required: - _jmespath_error - original_keys type: object UnauthorizedError: type: object properties: error: type: string description: Human-readable error message. required: - error description: >- Returned when the API key is missing, malformed, or lacks current API access. ForbiddenError: type: object properties: error: type: string description: Human-readable entitlement failure reason. requiredTier: type: integer format: int32 description: Minimum entitlement tier required for this endpoint. currentTier: type: integer format: int32 description: Caller entitlement tier when known. planKey: type: string description: Caller plan key when known. required: - error description: >- Returned when a PRO-gated endpoint denies access because the caller has no resolved authenticated user, entitlements cannot be verified, or the caller lacks the required entitlement tier. Error: type: object properties: message: type: string description: Error message (e.g., 'user not found', 'database connection failed') description: >- Error is returned when a handler encounters an error. It contains a simple error message that the developer can customize. RateLimitError: type: object description: Returned when a gateway or handler rate limit rejects the request. properties: error: type: string description: Human-readable rate-limit failure reason. required: - error GatewayError: type: object description: >- Returned by gateway infrastructure errors before an RPC handler runs, such as origin, routing, method, authentication, or quota checks. properties: error: oneOf: - type: string - type: object additionalProperties: true description: Gateway error reason or structured gateway failure details. required: - error RegimeTransition: type: object properties: regionId: type: string label: type: string description: Current regime label (the label the region just moved INTO). previousLabel: type: string description: >- Previous regime label (the label the region was in before). Empty for the first-ever recorded transition for a region. transitionedAt: type: integer format: int64 description: |- Unix ms when the transition was recorded. Mirrors snapshot.regime.transitioned_at when available.. Warning: Values > 2^53 may lose precision in JavaScript transitionDriver: type: string description: >- Free-text driver string from the seed writer (e.g. "cross_source_surge"). May be empty. snapshotId: type: string description: |- Snapshot id that materialized this transition. Points back to the full snapshot via intelligence:snapshot-by-id:v1:{snapshot_id}. description: |- RegimeTransition is a single recorded regime change moment. One of these lands in the log each time diffRegionalSnapshot() reports regime_changed. FieldViolation: type: object properties: field: type: string description: >- The field path that failed validation (e.g., 'user.email' for nested fields). For header validation, this will be the header name (e.g., 'X-API-Key') description: type: string description: >- Human-readable description of the validation violation (e.g., 'must be a valid email address', 'required field missing') required: - field - description description: FieldViolation describes a single validation error for a specific field. securitySchemes: WorldMonitorKey: type: apiKey in: header name: X-WorldMonitor-Key description: User-issued WorldMonitor API key. ApiKeyHeader: type: apiKey in: header name: X-Api-Key description: Alias header for the WorldMonitor API key (X-WorldMonitor-Key). BearerAuth: type: http scheme: bearer description: >- Bearer token: a Clerk-issued JWT for browser session flows, passed as Authorization: Bearer . ````