> ## 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. # GetFredSeriesBatch > GetFredSeriesBatch retrieves multiple FRED series in a single call. ## OpenAPI ````yaml /api/EconomicService.openapi.yaml post /api/economic/v1/get-fred-series-batch openapi: 3.1.0 info: title: EconomicService API version: 1.0.0 servers: - url: https://api.worldmonitor.app security: - WorldMonitorKey: [] - ApiKeyHeader: [] paths: /api/economic/v1/get-fred-series-batch: post: tags: - EconomicService summary: GetFredSeriesBatch description: GetFredSeriesBatch retrieves multiple FRED series in a single call. operationId: GetFredSeriesBatch parameters: - name: Idempotency-Key in: header description: >- Optional client-generated idempotency key. Retrying a POST with the same key and an identical request body replays the original response (only the status, body, and Content-Type are reproduced) instead of re-executing; reusing the key with a different body is rejected with 422. For mutations this avoids duplicating the side effect, while for batch-read POSTs it replays a cached snapshot that can be up to 24 hours stale. Keys are scoped per authenticated caller (falling back to the source IP for unauthenticated endpoints) and retained for 24 hours. required: false example: 4f8b9c2e-1a3d-4b6f-8e0a-2c5d7f9b1e34 schema: type: string minLength: 1 maxLength: 255 pattern: ^[\x21-\x7E]{1,255}$ requestBody: content: application/json: example: limit: 25 seriesIds: - GDP schema: $ref: '#/components/schemas/GetFredSeriesBatchRequest' required: true responses: '200': description: Successful response headers: Idempotency-Key: schema: type: string description: >- The idempotency key echoed from the request. Present only when the client opted into idempotency. Idempotent-Replayed: schema: type: boolean description: >- true when this response was replayed from an earlier request with the same key, false on the first (original) request. Present only when the client opted into idempotency. content: application/json: example: fetched: 1 requested: 1 results: exampleKey: frequency: example observations: - date: '2026-01-15' value: 1.5 seriesId: GDP title: example units: example schema: $ref: '#/components/schemas/GetFredSeriesBatchResponse' '400': description: >- Validation error, invalid Idempotency-Key header, or malformed JSON request body content: application/json: schema: oneOf: - $ref: '#/components/schemas/ValidationError' - type: object required: - error - message properties: error: type: string message: type: string - $ref: '#/components/schemas/InvalidRequestBodyError' '401': description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/UnauthorizedError' '403': description: >- API access requires an active subscription (the API key's subscription is inactive or expired). content: application/json: schema: $ref: '#/components/schemas/ForbiddenError' '409': description: A request with this Idempotency-Key is still being processed headers: Idempotency-Key: schema: type: string description: The idempotency key supplied by the client. Retry-After: schema: type: string description: Seconds to wait before retrying the in-flight request. content: application/json: schema: type: object required: - error - message properties: error: type: string message: type: string '422': description: The Idempotency-Key was already used with a different request body headers: Idempotency-Key: schema: type: string description: The idempotency key supplied by the client. content: application/json: schema: type: object required: - error - message properties: error: type: string message: type: string '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' components: schemas: GetFredSeriesBatchRequest: type: object properties: seriesIds: type: array items: type: string maxItems: 20 minItems: 1 description: FRED series IDs (e.g., "WALCL", "FEDFUNDS"). Max 20. maxItems: 20 minItems: 1 limit: type: integer format: int32 description: Maximum number of observations per series. Defaults to 120. description: >- GetFredSeriesBatchRequest looks up multiple FRED series in a single call. GetFredSeriesBatchResponse: type: object properties: results: type: object additionalProperties: $ref: '#/components/schemas/FredSeries' description: Map of series_id -> FRED series for found series. fetched: type: integer format: int32 description: Number of series successfully fetched. requested: type: integer format: int32 description: Number of series requested. description: GetFredSeriesBatchResponse contains the requested FRED series data. 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. InvalidRequestBodyError: type: object description: Returned when a JSON POST request body is empty or malformed. properties: message: type: string description: Invalid request body required: - message 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 FredSeries: type: object properties: seriesId: type: string minLength: 1 description: Series identifier (e.g., "GDP", "UNRATE", "CPIAUCSL"). title: type: string description: Series title. units: type: string description: Unit of measurement. frequency: type: string description: Data frequency (e.g., "Monthly", "Quarterly"). observations: type: array items: $ref: '#/components/schemas/FredObservation' required: - seriesId description: FredSeries represents a FRED time series with metadata. 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. FredObservation: type: object properties: date: type: string description: Observation date as YYYY-MM-DD string. value: type: number format: double description: Observation value. description: >- FredObservation represents a single data point from a FRED economic series. 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). ````